<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">medvis</journal-id><journal-title-group><journal-title xml:lang="ru">Медицинская визуализация</journal-title><trans-title-group xml:lang="en"><trans-title>Medical Visualization</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1607-0763</issn><issn pub-type="epub">2408-9516</issn><publisher><publisher-name>RDS-Media Ltd.</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.24835/1607-0763-1206</article-id><article-id custom-type="elpub" pub-id-type="custom">medvis-1308</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ПОЧКИ. Специальная сессия под редакцией профессора А.И. Громова</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>KIDNEYS. Special session edited by professor A.I. Gromov</subject></subj-group></article-categories><title-group><article-title>Доплеровский артефакт мерцания: физические механизмы и место в диагностической практике. Современное состояние вопроса</article-title><trans-title-group xml:lang="en"><trans-title>Doppler twinkling artifact: physical mechanisms and place in diagnostic practice. State of the art</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9014-9022</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Громов</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Gromov</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Громов Александр Игоревич – доктор мед. наук, профессор, профессор кафедры лучевой диагностики; руководитель группы лучевых методов диагностики и лечения отдела онкоурологии</p><p>105425 Москва, 3-я Парковая ул., 51, стр. 1;</p><p>127473 Москва, ул. Делегатская, д. 20, стр.1</p></bio><bio xml:lang="en"><p>Alexander I. Gromov – Doct. of Sci. (Med.), Associate Professor; head of the radiation diagnosis and treatment methods, Oncourology Department</p><p>51-1, 3rd Parkovaya str., Moscow 105425;20/1, Delegatskaya str., Moscow 127473</p></bio><email xlink:type="simple">gai8@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4979-7706</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сапожников</surname><given-names>О. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Sapozhnikov</surname><given-names>O. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сапожников Олег Анатольевич – доктор физ.-мат. наук, профессор физического факультета МГУ имени М.В. Ломоносова</p><p>119991 Москва, Ленинские горы, Российская Федерация;</p><p>Seattle, WA, 98105 USA</p></bio><bio xml:lang="en"><p>Oleg A. Sapozhnikov – Doct. of Sci. (Phys.-Math.), Professor at Physics Faculty of M.V. Lomonosov Moscow State University</p><p>Leninskie Gory, Moscow 119991, Russian FederationSeattle, WA, 98105 USA</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8784-8415</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Каприн</surname><given-names>А. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Kaprin</surname><given-names>A. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Каприн Андрей Дмитриевич – доктор мед. наук, профессор, академик РАН, заслуженный врач РФ, генеральный директор ФГБУ “НМИЦ радиологии” Минздрава России; директор МНИОИ им. П. А. Герцена – филиал ФГБУ “НМИЦ радиологии” Минздрава России; заведующий кафедрой урологии и оперативной нефрологии с курсом онкоурологии медицинского факультета ФГАОУ ВО “Российский университет дружбы народов”</p><p>125284 Москва, 2-й Боткинский проезд, д. 3;125284 Москва, 2-й Боткинский проезд, д. 3; 117198 Москва, ул. Миклухо-Маклая, д. 6</p></bio><bio xml:lang="en"><p>Andrei D. Kaprin – Doct. of Sci. (Med.), Academician of RAS, Professor, general director of the National Medical Research Centre of Radiology of Ministry of health of Russian Federation; Director of P. Hertsen Moscow oncology research institute; Head of Department of Oncology and Radiology of RUDN University</p><p>3, 2nd Botkinsky proezd, Moscow 125284; 6, Miklukho-Maklay str., Moscow 117198 </p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>НИИ урологии и интервенционной радиологии им. Н.А. Лопаткина – филиал ФГБУ “НМИЦ радиологии” Минздрава России;&#13;
ФГБОУ ВО “Московский государственный медико-стоматологический университет им. А.И. Евдокимова” Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>N. Lopatkin Scientific Research Institute of Urology and Interventional Radiology – branch of the National Medical Research Radiologiсal Center of the Ministry of Health of Russian Federation;&#13;
A.I. Evdokimov Moscow State University of Medicine and Dentistry of the Ministry of Healthcare of the Russian Federation</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГБОУ ВО “Московский государственный университет имени М.В. Ломоносова”;&#13;
Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University;&#13;
Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>ФГБУ “Национальный медицинский исследовательский центр радиологии” Минздрава России;&#13;
МНИОИ им. П. А. Герцена – филиал ФГБУ «НМИЦ радиологии» Минздрава России;&#13;
ФГАОУ ВО “Российский университет дружбы народов” Минобрнауки России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation;&#13;
P. Hertsen Moscow oncology research institute – Branch of National Medical Research Radiological Centre of the Ministry of Healthcare of the Russian Federation;&#13;
The Peoples' Friendship University of Russia</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>28</day><month>12</month><year>2022</year></pub-date><volume>27</volume><issue>1</issue><fpage>120</fpage><lpage>134</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Громов А.И., Сапожников О.А., Каприн А.Д., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Громов А.И., Сапожников О.А., Каприн А.Д.</copyright-holder><copyright-holder xml:lang="en">Gromov A.I., Sapozhnikov O.A., Kaprin A.D.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://medvis.rdsmedia.ru/jour/article/view/1308">https://medvis.rdsmedia.ru/jour/article/view/1308</self-uri><abstract><p>Введение. Артефакт мерцания известен специалистам ультразвуковой диагностики с 1996 г. Однако до настоящего времени нет однозначного понимания как физических основ его появления, так и областей ультразвуковой диагностики, где выявление его несет реальную диагностическую информацию.Материал и методы. В электронных базах данных (PubMed, E-library, Web of Science) был проведен поиск опубликованных исследований по ключевым словам “twinkling artifact”, “мерцающий артефакт”, “артефакт мерцания”. Систематизирована и проанализирована имеющаяся научная литература, посвященная доплеровскому артефакту мерцания с момента первых публикаций о его существовании. Отмечены собственные разработки на эту тему. Определены современные взгляды на данное явление и его место в ультразвуковой диагностике. Представлена основная на настоящий момент версия о причинах возникновения данного явления.Результаты. Сформулированы рекомендации для практических врачей по изменению настроек ультразвукового сканера с целью повышения выявляемости артефакта мерцания. Определены направления использования артефакта для получения дополнительных диагностических признаков патологических изменений, к которым в настоящее время относят диагностику нефро-, уретеро- и холедохолитиаза.Заключение. Отмечена высокая эффективность использования артефакта мерцания для диагностики мелких камней почек, сопоставимая с возможностями компьютерной томографии. Показана низкая результативность использования артефакта для выявления микрокальцинатов молочной железы и обызвествлений других анатомических структур.</p></abstract><trans-abstract xml:lang="en"><p>The twinkling artifact has been known to specialists in ultrasound diagnostics since 1996. However, until now there is no understanding of the reasons for its appearance, and the place of its application in diagnostics.</p><sec><title>Material and methods</title><p>Material and methods. Electronic databases (PubMed, E-library, Web of Science) were searched studies using the keyword – “twinkling artifact”. The scientific publications on the Doppler twinkling artifact from the moment of the first reports about its existence is systematized and analyzed. The authors' own developments on this topic are presented. Modern views on this phenomenon and its place in ultrasound diagnostics are described. An explanation of the physical mechanisms of this phenomenon is given.</p></sec><sec><title>Results</title><p>Results. Recommendations are formulated for practitioners on changing the settings of an ultrasound scanner in order to increase twinkling artifact detectability. The directions of using the artifact to obtain additional diagnostic signs of pathological changes, which currently include the diagnosis of nephro-, uretero- and choledocholithiasis, are determined.</p></sec><sec><title>Conclusions</title><p>Conclusions. The high efficiency of the use of the twinkling artifact for the diagnosis of small kidney stones, comparable with the capabilities of computed tomography, has been shown.  </p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>ультразвуковые артефакты</kwd><kwd>артефакт мерцания</kwd><kwd>мерцающий артефакт</kwd></kwd-group><kwd-group xml:lang="en"><kwd>ultrasonic artifact</kwd><kwd>twinkling artifact</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Написание обзора частично поддержано грантом РФФИ № 20-02-00139.</funding-statement><funding-statement xml:lang="en">The review was partially supported by RFBR grant No. 20-02-00139.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Smith R.C., Varanelli M. Diagnosis and management of acute ureterolithiasis: CT is truth. Am. J. Roentgenol. 2000; 175 (1): 3–6. http://doi.org/10.2214/ajr.175.1.1750003</mixed-citation><mixed-citation xml:lang="en">Smith R.C., Varanelli M. Diagnosis and management of acute ureterolithiasis: CT is truth. Am. J. Roentgenol. 2000; 175 (1): 3–6. http://doi.org/10.2214/ajr.175.1.1750003</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Sorensen M.D., Harper J.D., Hsi R.S. et al. B-mode ultrasound versus color Doppler twinkling artifact in detecting kidney stones. J. Endourol. 2013; 27 (2): 149–153. http://doi.org/10.1089/end.2012.0430</mixed-citation><mixed-citation xml:lang="en">Sorensen M.D., Harper J.D., Hsi R.S. et al. B-mode ultrasound versus color Doppler twinkling artifact in detecting kidney stones. J. Endourol. 2013; 27 (2): 149–153. http://doi.org/10.1089/end.2012.0430</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Aytaç S.K., Özcan H. Effect of color Doppler system on the twinkling sign associated with urinary tract calculi. J. Clin. Ultrasound. 1999; 27 (8): 433–439. http://doi.org/10.1002/(sici)1097-0096(199910)27:8&lt;433::aid-jcu4&gt;3.0.co;2-1</mixed-citation><mixed-citation xml:lang="en">Aytaç S.K., Özcan H. Effect of color Doppler system on the twinkling sign associated with urinary tract calculi. J. Clin. Ultrasound. 1999; 27 (8): 433–439. http://doi.org/10.1002/(sici)1097-0096(199910)27:8&lt;433::aid-jcu4&gt;3.0.co;2-1</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Lee J.Y., Kim S.H., Cho J.Y., Han D. Color and power Doppler twinkling artifacts from urinary stones: clinical observations and phantom studies. Am. J. Roentgenol. 2001; 176 (6): 1441–1445. http://doi.org/10.2214/ajr.176.6.1761441</mixed-citation><mixed-citation xml:lang="en">Lee J.Y., Kim S.H., Cho J.Y., Han D. Color and power Doppler twinkling artifacts from urinary stones: clinical observations and phantom studies. Am. J. Roentgenol. 2001; 176 (6): 1441–1445. http://doi.org/10.2214/ajr.176.6.1761441</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Громов А.И., Зыкин Б.И., Кубова С.Ю., Сытник К.А. Тканевая допплерография. II. Диагностика камней дистального отдела мочеточника. Эхография. 2003; 4 (4): 376–382.</mixed-citation><mixed-citation xml:lang="en">Gromov A.I., Zykin B.I., Kubova S.Yu., Sytnik K.A. Tissue dopplerography. II. Diagnosis of stones in the distal ureter. Echography. 2003; 2 (4): 376–382. (In Russian)</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Turrin A., Minola P., Costa F. et al. Diagnostic value of colour Doppler twinkling artefact in sites negative for stones on B mode renal sonography. Urol. Res. 2007; 35 (6): 313–317. http://doi.org/10.1007/s00240-007-0110-8</mixed-citation><mixed-citation xml:lang="en">Turrin A., Minola P., Costa F. et al. Diagnostic value of colour Doppler twinkling artefact in sites negative for stones on B mode renal sonography. Urol. Res. 2007; 35 (6): 313–317. http://doi.org/10.1007/s00240-007-0110-8</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Park S.J., Yi B. H., Lee H.K. et al. Evaluation of patients with suspected ureteral calculi using sonography as an initial diagnostic tool: how can we improve diagnostic accuracy? J. Ultrasound Med. 2008; 27 (10): 1441–1450. http://doi.org/10.7863/jum.2008.27.10.1441</mixed-citation><mixed-citation xml:lang="en">Park S.J., Yi B. H., Lee H.K. et al. Evaluation of patients with suspected ureteral calculi using sonography as an initial diagnostic tool: how can we improve diagnostic accuracy? J. Ultrasound Med. 2008; 27 (10): 1441–1450. http://doi.org/10.7863/jum.2008.27.10.1441</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Dillman J.R., Kappil M., Weadock W.J. et al. Sonographic twinkling artifact for renal calculus detection: correlation with CT. Radiology. 2011; 259 (3): 911–916. http://doi.org/10.1148/radiol.11102128</mixed-citation><mixed-citation xml:lang="en">Dillman J.R., Kappil M., Weadock W.J. et al. Sonographic twinkling artifact for renal calculus detection: correlation with CT. Radiology. 2011; 259 (3): 911–916. http://doi.org/10.1148/radiol.11102128</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Kielar A.Z., Shabana W., Vakili M., Rubin J. Prospective evaluation of Doppler sonography to detect the twinkling artifact versus unenhanced computed tomography for identifying urinary tract calculi. J. Ultrasound Med. 2012; 31 (10): 1619–1625. http://doi.org/10.7863/jum.2012.31.10.1619</mixed-citation><mixed-citation xml:lang="en">Kielar A.Z., Shabana W., Vakili M., Rubin J. Prospective evaluation of Doppler sonography to detect the twinkling artifact versus unenhanced computed tomography for identifying urinary tract calculi. J. Ultrasound Med. 2012; 31 (10): 1619–1625. http://doi.org/10.7863/jum.2012.31.10.1619</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Winkel R.R., Kalhauge A., Fredfeldt K.E. The usefulness of ultrasound colour-Doppler twinkling artefact for detecting urolithiasis compared with low dose nonenhanced computerized tomography. Ultrasound Med. Biol. 2012; 38 (7): 1180–1187. http://doi.org/10.1016/j.ultrasmedbio.2012.03.003</mixed-citation><mixed-citation xml:lang="en">Winkel R.R., Kalhauge A., Fredfeldt K.E. The usefulness of ultrasound colour-Doppler twinkling artefact for detecting  urolithiasis  compared  with  low  dose nonenhanced computerized tomography. Ultrasound Med. Biol. 2012; 38 (7): 1180–1187. http://doi.org/10.1016/j.ultrasmedbio.2012.03.003</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Korkmaz M., Aras B., Şanal B. et al. Investigating the clinical significance of twinkling artifacts in patients with urolithiasis smaller than 5 mm. Jpn. J. Radiol. 2014; 32 (8): 482–486. http://doi.org/10.1007/s11604-014-0337-6</mixed-citation><mixed-citation xml:lang="en">Korkmaz M., Aras B., Şanal B. et al. Investigating the clinical significance of twinkling artifacts in patients with urolithiasis smaller than 5 mm. Jpn. J. Radiol. 2014; 32 (8): 482–486. http://doi.org/10.1007/s11604-014-0337-6</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Masch W.R., Cohan R.H., Ellis J.H. et al. Clinical effectiveness of prospectively reported sonographic twinkling artifact for the diagnosis of renal calculus in patients without known urolithiasis. Am. J. Roentgenol. 2016; 206 (2): 326–331. http://doi.org/10.2214/AJR.15.14998</mixed-citation><mixed-citation xml:lang="en">Masch W.R., Cohan R.H., Ellis J.H. et al. Clinical effectiveness of prospectively reported sonographic twinkling artifact for the diagnosis of renal calculus in patients without known urolithiasis. Am. J. Roentgenol. 2016; 206 (2): 326–331. http://doi.org/10.2214/AJR.15.14998</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Wood B.G., Urban M.W. Detecting kidney stones using twinkling artifacts: Survey of kidney stones with varying composition and size. Ultrasound Med. Biol. 46 (1): 156–166. http://doi.org/10.1016/j.ultrasmedbio.2019.09.008</mixed-citation><mixed-citation xml:lang="en">Wood B.G., Urban M.W. Detecting kidney stones using twinkling artifacts: Survey of kidney stones with varying composition and size. Ultrasound Med. Biol. 46 (1): 156–166. http://doi.org/10.1016/j.ultrasmedbio.2019.09.008</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Rahmouni A., Bargoin R., Herment A. et al. Color Doppler twinkling artifact in hyperechoic regions. Radiology. 1996; 199 (1): 269–271. http://doi.org/10.1148/radiology.199.1.8633158</mixed-citation><mixed-citation xml:lang="en">Rahmouni A., Bargoin R., Herment A. et al. Color Doppler twinkling artifact in hyperechoic regions. Radiology. 1996; 199 (1): 269–271. http://doi.org/10.1148/radiology.199.1.8633158</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Васильев А.Ю., Громов А.И. Цветовое допплеровское картирование с использованием энергетического допплера в оценке патологии предстательной железы. Военно-медицинский журнал. 1997; 318 (4): 33–37.</mixed-citation><mixed-citation xml:lang="en">Vasiliev A.Yu., Gromov A.I. Color Doppler mapping using power Doppler in the assessment of prostate pathology. Military Medical Journal. 1997; 318 (4): 33–37. (In Russian)</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Chelfouh N., Grenier N., Higueret D. et al. Characterization of urinary calculi: in vitro study of “twinkling artifact” revealed by color-flow sonography. Am. J. Roentgenol. 1998; 171 (4): 1055–1060. http://doi.org/10.2214/ajr.171.4.9762996</mixed-citation><mixed-citation xml:lang="en">Chelfouh N., Grenier N., Higueret D. et al. Characterization of urinary calculi: in vitro study of “twinkling artifact” revealed by color-flow sonography. Am. J. Roentgenol. 1998; 171 (4): 1055–1060. http://doi.org/10.2214/ajr.171.4.9762996</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Khan H.G., Gailloud P., Martin J.B. et al. Twinkling artifact on intracerebral color Doppler sonography. Am. J. Neuroradiol. 1999; 20 (2): 246–247.</mixed-citation><mixed-citation xml:lang="en">Khan H.G., Gailloud P., Martin J.B. et al. Twinkling artifact on intracerebral color Doppler sonography. Am. J. Neuroradiol. 1999; 20 (2): 246–247.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Trillaud H., Pariente J. L., Rabie A., Grenier N. Detection of encrusted indwelling ureteral stents using a twinkling artifact revealed on color Doppler sonography. Am. J. Roentgenol. 2001; 176 (6): 1446–1448. http://doi.org/10.2214/ajr.176.6.1761446</mixed-citation><mixed-citation xml:lang="en">Trillaud H., Pariente J. L., Rabie A., Grenier N. Detection of encrusted indwelling ureteral stents using a twinkling artifact revealed on color Doppler sonography. Am. J. Roentgenol. 2001; 176 (6): 1446–1448. http://doi.org/10.2214/ajr.176.6.1761446</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Ustymowicz A., Krejza J., Mariak Z. Twinkling artifact in color Doppler imaging of the orbit. J. Ultrasound Med. 2002; 21 (5): 559–563. http://doi.org/10.7863/jum.2002.21.5.559</mixed-citation><mixed-citation xml:lang="en">Ustymowicz A., Krejza J., Mariak Z. Twinkling artifact in color Doppler imaging of the orbit. J. Ultrasound Med. 2002; 21 (5): 559–563. http://doi.org/10.7863/jum.2002.21.5.559</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Громов А.И., Зыкин Б.И. Тканевая допплерография. Регистрация с помощью цветовой допплерографии эффекта резонанса микроконкрементов, возникающего под воздействием ультразвуковой волны. Эхография. 2002; 3 (4): 348–353.</mixed-citation><mixed-citation xml:lang="en">Gromov A.I., Zykin B.I. Tissue dopplerography. Registration using color dopplerography of the effect of resonance of microcalculi, which occurs under the influence of an ultrasonic wave. Echography. 2002; 3 (4): 348–353. (In Russian)</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Кубова С.Ю. Значение допплеровского “мерцающего артефакта” для диагностики конкрементов и внутритканевых кальцинатов: Автореф. дис. ... канд. мед. наук. Обнинск, 2004. 22 с.</mixed-citation><mixed-citation xml:lang="en">Kubova S.Yu. The value of the Doppler “twinkling artifact” for the diagnosis of calculi and interstitial calcifications: Abstract of Cand. Med. Sci. Obninsk, 2004. 22 p. (In Russian)</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Громов А.И., Кубова С.Ю. Ультразвуковые артефакты. М.: Видар-М, 2007. 64 с.</mixed-citation><mixed-citation xml:lang="en">Gromov A.I., Kubova S.Yu. Ultrasonic artifacts. M.: Vidar-M, 2007. 64 p. (In Russian)</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Kamaya A., Tuthill T., Rubin J.M. Twinkling artifact on color Doppler sonography: dependence on machine parameters and underlying cause. Am. J. Roentgenol. 2003; 180 (1): 215–222. http://doi.org/10.2214/ajr.180.1.1800215</mixed-citation><mixed-citation xml:lang="en">Kamaya A., Tuthill T., Rubin J.M. Twinkling artifact on color Doppler sonography: dependence on machine parameters and underlying cause. Am. J. Roentgenol. 2003; 180 (1): 215–222. http://doi.org/10.2214/ajr.180.1.1800215</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">Лелюк В.Г., Лелюк С.Э., Карпочев М.В. Допплеровский “twinkling”-артефакт в эксперименте и практике. Эхография. 2003; 4 (1): 74–83.</mixed-citation><mixed-citation xml:lang="en">Lelyuk V.G., Lelyuk S.E., Karpochev M.V. Doppler “twinkling”  artifact  in  experiment  and  practice. Echography. 2003; 4 (1): 74–83. (In Russian)</mixed-citation></citation-alternatives></ref><ref id="cit25"><label>25</label><citation-alternatives><mixed-citation xml:lang="ru">Alan C., Koçoğlu H., Kosar S. et al. Role of twinkling artifact in characterization of urinary calculi. Actas Urol. Esp. (English Edition). 2011; 35 (7): 396–402. http://doi.org/10.1016/j.acuro.2011.02.006</mixed-citation><mixed-citation xml:lang="en">Alan C., Koçoğlu H., Kosar S. et al. Role of twinkling artifact in characterization of urinary calculi. Actas Urol. Esp. (English Edition). 2011; 35 (7): 396–402. http://doi.org/10.1016/j.acuro.2011.02.006</mixed-citation></citation-alternatives></ref><ref id="cit26"><label>26</label><citation-alternatives><mixed-citation xml:lang="ru">Jamzad A., Setarehdan S.K. A novel approach for quantification and analysis of the color Doppler twinkling artifact with application in noninvasive surface roughness characterization: an in vitro phantom study. J. Ultrasound Med. 2014; 33 (4): 597–610. http://doi.org/10.7863/ultra.33.4.597</mixed-citation><mixed-citation xml:lang="en">Jamzad A., Setarehdan S.K. A novel approach for quantification and analysis of the color Doppler twinkling artifact with application in noninvasive surface roughness characterization: an in vitro phantom study. J. Ultrasound Med. 2014; 33 (4): 597–610. http://doi.org/10.7863/ultra.33.4.597</mixed-citation></citation-alternatives></ref><ref id="cit27"><label>27</label><citation-alternatives><mixed-citation xml:lang="ru">Shabana W., Bude R.O., Rubin J.M. Comparison between color Doppler twinkling artifact and acoustic shadowing for renal calculus detection: an in vitro study. Ultrasound Med. Biol. 2009; 35 (2): 339–350. http://doi.org/10.1016/j.ultrasmedbio.2008.09.023</mixed-citation><mixed-citation xml:lang="en">Shabana W., Bude R.O., Rubin J.M. Comparison between color Doppler twinkling artifact and acoustic shadowing for renal calculus detection: an in vitro study. Ultrasound Med. Biol. 2009; 35 (2): 339–350. http://doi.org/10.1016/j.ultrasmedbio.2008.09.023</mixed-citation></citation-alternatives></ref><ref id="cit28"><label>28</label><citation-alternatives><mixed-citation xml:lang="ru">Verhagen M.V., Watson T.A., Hickson M. et al. Acoustic shadowing in pediatric kidney stone ultrasound: a retrospective study with non-enhanced computed tomography as reference standard. Pediatr. Radiol. 2019; 49 (6): 777–783. http://doi.org/10.1007/s00247-019-04372-x</mixed-citation><mixed-citation xml:lang="en">Verhagen M.V., Watson T.A., Hickson M. et al. Acoustic shadowing in pediatric kidney stone ultrasound: a retrospective study with non-enhanced computed tomography as reference standard. Pediatr. Radiol. 2019; 49 (6): 777–783. http://doi.org/10.1007/s00247-019-04372-x</mixed-citation></citation-alternatives></ref><ref id="cit29"><label>29</label><citation-alternatives><mixed-citation xml:lang="ru">Lu W., Sapozhnikov O.A., Bailey M.R. et al. Evidence for trapped surface bubbles as the cause for the twinkling artifact in ultrasound imaging. Ultrasound Med. Biol. 2013; 39 (6): 1026–1038. https://doi.org/10.1016/j.ultrasmedbio.2013.01.011</mixed-citation><mixed-citation xml:lang="en">Lu W., Sapozhnikov O.A., Bailey M.R. et al. Evidence for trapped surface bubbles as the cause for the twinkling artifact in ultrasound imaging. Ultrasound Med. Biol. 2013; 39 (6): 1026–1038. https://doi.org/10.1016/j.ultrasmedbio.2013.01.011</mixed-citation></citation-alternatives></ref><ref id="cit30"><label>30</label><citation-alternatives><mixed-citation xml:lang="ru">Sapozhnikov O.A., Trusov L.A., Gromov A.I. et al. Radiation force imparted on a kidney stone by a Doppler-mode diagnostic pulse. J. Acoust. Soc. Am. 2006; 120 (5, Pt. 2): 3109. https://doi.org/10.1121/1.4787586</mixed-citation><mixed-citation xml:lang="en">Sapozhnikov O.A., Trusov L.A., Gromov A.I. et al. Radiation force imparted on a kidney stone by a Doppler-mode diagnostic pulse. J. Acoust. Soc. Am. 2006; 120 (5, Pt. 2): 3109. https://doi.org/10.1121/1.4787586</mixed-citation></citation-alternatives></ref><ref id="cit31"><label>31</label><citation-alternatives><mixed-citation xml:lang="ru">Sapozhnikov O.A., Owen N.R., Bailey M.R. et al. Use of scattering of ultrasound pulses and shock waves by kidney stones for imaging in lithotripsy. In: Proceedings of the 14th International Congress on Sound and Vibration. 2007; ICSV 2007: 229–236.</mixed-citation><mixed-citation xml:lang="en">Sapozhnikov O.A., Owen N.R., Bailey M.R. et al. Use of scattering of ultrasound pulses and shock waves by kidney stones for imaging in lithotripsy. In: Proceedings of the 14th International Congress on Sound and Vibration. 2007; ICSV 2007: 229–236.</mixed-citation></citation-alternatives></ref><ref id="cit32"><label>32</label><citation-alternatives><mixed-citation xml:lang="ru">Gromov A.I., Kubova S.Y., Kapustin V.V. et al. Visualization of acoustic currents in liquid accumulations under ultrasound investigation. Eur. Radiol. (ECR 2007), Book of Abstracts. 17 Suppl. 1 (February 2007): 497.</mixed-citation><mixed-citation xml:lang="en">Gromov A.I., Kubova S.Y., Kapustin V.V. et al. Visualization of acoustic currents in liquid accumulations under ultrasound investigation. Eur. Radiol. (ECR 2007), Book of Abstracts. 17 Suppl. 1 (February 2007): 497.</mixed-citation></citation-alternatives></ref><ref id="cit33"><label>33</label><citation-alternatives><mixed-citation xml:lang="ru">Sapozhnikov O.A., Maxwell A.D., MacConaghy B., Bailey M.R. A mechanistic analysis of stone fracture in lithotripsy. J. Acoust. Soc. Am. 2007; 112 (2): 1190–1202. http://doi.org/10.1121/1.2404894</mixed-citation><mixed-citation xml:lang="en">Sapozhnikov O.A., Maxwell A.D., MacConaghy B., Bailey M.R. A mechanistic analysis of stone fracture in lithotripsy. J. Acoust. Soc. Am. 2007; 112 (2): 1190–1202. http://doi.org/10.1121/1.2404894</mixed-citation></citation-alternatives></ref><ref id="cit34"><label>34</label><citation-alternatives><mixed-citation xml:lang="ru">Sapozhnikov O.A., Bailey M.R. Radiation force of an arbitrary acoustic beam on an elastic sphere in a fluid. J. Acoust. Soc. Am. 2013; 133 (2): 661–676. http://doi.org/10.1121/1.4773924</mixed-citation><mixed-citation xml:lang="en">Sapozhnikov O.A., Bailey M.R. Radiation force of an arbitrary acoustic beam on an elastic sphere in a fluid. J. Acoust. Soc. Am. 2013; 133 (2): 661–676. http://doi.org/10.1121/1.4773924</mixed-citation></citation-alternatives></ref><ref id="cit35"><label>35</label><citation-alternatives><mixed-citation xml:lang="ru">Леонов Д.В., Кульберг Н.С., Громов А.И., Морозов С.П., Ким С.Ю. Исследование причин возникновения мерцающего артефакта в доплеровских режимах ультразвукового медицинского диагностического устройства. Акустический журнал. 2018; 64 (1): 100–111.</mixed-citation><mixed-citation xml:lang="en">Leonov D.V., Kulberg N.S., Gromov A.I., Morozov S.P., Kim S.Yu. Investigation of the causes of the twinkling artifact in the Doppler modes of an ultrasound medical diagnostic device. Akusticheskij Zhurnal. 2018; 64 (1): 100–111. (In Russian)</mixed-citation></citation-alternatives></ref><ref id="cit36"><label>36</label><citation-alternatives><mixed-citation xml:lang="ru">Кульберг Н.С., Громов А.И., Леонов Д.В., Осипов Л.В., Усанов М.С., Морозов С.П. Диагностический режим обнаружения кальцинатов и конкрементов при ультразвуковом исследовании. Радиология-практика. 2018; 1 (67): 37–49.</mixed-citation><mixed-citation xml:lang="en">Kulberg N.S., Gromov A.I., Leonov D.V., Osipov L.V., Usanov M.S., Morozov S.P. Diagnostic mode for the detection of calcifications and calculi during ultrasound examination. Radiology-practice. 2018; 1 (67): 37–49. (In Russian)</mixed-citation></citation-alternatives></ref><ref id="cit37"><label>37</label><citation-alternatives><mixed-citation xml:lang="ru">Sapozhnikov O., Lu W., Bailey M.R. et al. Bubbles trapped on the surface of kidney stones as a cause of the twinkling artifact in ultrasound imaging. Proceedings Meet. Acoust. 2013; 19 (1): 075033. http://doi.org/10.1121/1.4800292</mixed-citation><mixed-citation xml:lang="en">Sapozhnikov O., Lu W., Bailey M.R. et al. Bubbles trapped on the surface of kidney stones as a cause of the twinkling artifact in ultrasound imaging. Proceedings Meet. Acoust. 2013; 19 (1): 075033. http://doi.org/10.1121/1.4800292</mixed-citation></citation-alternatives></ref><ref id="cit38"><label>38</label><citation-alternatives><mixed-citation xml:lang="ru">Lu W., Sapozhnikov O., Hsi R. et al. Evidence for trapped surface micro-bubbles as the etiology of the twinkling artifact observed from ultrasound imaging of kidney stones. J. Urol. 2013; 189 (4S): e830–e831. http://doi.org/10.1016/j.ultrasmedbio.2013.01.011</mixed-citation><mixed-citation xml:lang="en">Lu W., Sapozhnikov O., Hsi R. et al. Evidence for trapped surface micro-bubbles as the etiology of the twinkling artifact observed from ultrasound imaging of kidney stones. J. Urol. 2013; 189 (4S): e830–e831. http://doi.org/10.1016/j.ultrasmedbio.2013.01.011</mixed-citation></citation-alternatives></ref><ref id="cit39"><label>39</label><citation-alternatives><mixed-citation xml:lang="ru">Harvey E.N., Barnes D.K., McElroy W.D. et al. Bubble formation in animals. I. Physical factors. J. Cellular Comparative Physiol. 1944; 24 (1): 1–22. https://doi.org/10.1002/jcp.1030240102</mixed-citation><mixed-citation xml:lang="en">Harvey E.N., Barnes D.K., McElroy W.D. et al. Bubble formation in animals. I. Physical factors. J. Cellular Comparative Physiol. 1944; 24 (1): 1–22. https://doi.org/10.1002/jcp.1030240102</mixed-citation></citation-alternatives></ref><ref id="cit40"><label>40</label><citation-alternatives><mixed-citation xml:lang="ru">Sandersius S., Rez P. Morphology of crystals in calcium oxalate monohydrate kidney stones. Urol. Res. 2007; 35 (6): 287–293. http://doi.org/10.1007/s00240-007-0115-3</mixed-citation><mixed-citation xml:lang="en">Sandersius S., Rez P. Morphology of crystals in calcium oxalate monohydrate kidney stones. Urol. Res. 2007; 35 (6): 287–293. http://doi.org/10.1007/s00240-007-0115-3</mixed-citation></citation-alternatives></ref><ref id="cit41"><label>41</label><citation-alternatives><mixed-citation xml:lang="ru">Racek M., Racek J., Hupáková I. Scanning electron microscopy in analysis of urinary stones. Scand. J. Clin. Lab. Invest. 2019; 79 (3): 208–217. http://doi.org/10.1080/00365513.2019.1578995</mixed-citation><mixed-citation xml:lang="en">Racek M., Racek J., Hupáková I. Scanning electron microscopy in analysis of urinary stones. Scand. J. Clin. Lab. Invest. 2019; 79 (3): 208–217. http://doi.org/10.1080/00365513.2019.1578995</mixed-citation></citation-alternatives></ref><ref id="cit42"><label>42</label><citation-alternatives><mixed-citation xml:lang="ru">Tanabe M., Naito Y., Nishimoto M., Liu L. Effect of pulse repetition frequency on microcalcification detection in color flow imaging. Jap. J. App. Phys. 2014; 53 (7S): 07KF15.</mixed-citation><mixed-citation xml:lang="en">Tanabe M., Naito Y., Nishimoto M., Liu L. Effect of pulse repetition frequency on microcalcification detection in color flow imaging. Jap. J. App. Phys. 2014; 53 (7S): 07KF15.</mixed-citation></citation-alternatives></ref><ref id="cit43"><label>43</label><citation-alternatives><mixed-citation xml:lang="ru">Simon J.C., Sapozhnikov O.A., Kreider W. et al. The role of trapped bubbles in kidney stone detection with the color Doppler ultrasound twinkling artifact. Phys. Med. Biol. 2018; 63 (2): 025011. http://doi.org/10.1088/1361-6560/aa9a2f</mixed-citation><mixed-citation xml:lang="en">Simon J.C., Sapozhnikov O.A., Kreider W. et al. The role of trapped bubbles in kidney stone detection with the color Doppler ultrasound twinkling artifact. Phys. Med. Biol. 2018; 63 (2): 025011. http://doi.org/10.1088/1361-6560/aa9a2f</mixed-citation></citation-alternatives></ref><ref id="cit44"><label>44</label><citation-alternatives><mixed-citation xml:lang="ru">Simon J.C., Holm J.R., Thiel J. et al. Evidence of microbubbles on kidney stones in humans. Ultrasound Med. Biol. 2020; 46 (7): 1802–1807. http://doi.org/10.1016/j.ultrasmedbio.2020.02.010</mixed-citation><mixed-citation xml:lang="en">Simon J.C., Holm J.R., Thiel J. et al. Evidence of microbubbles on kidney stones in humans. Ultrasound Med. Biol. 2020; 46 (7): 1802–1807. http://doi.org/10.1016/j.ultrasmedbio.2020.02.010</mixed-citation></citation-alternatives></ref><ref id="cit45"><label>45</label><citation-alternatives><mixed-citation xml:lang="ru">Леонов Д.В., Кульберг Н.С., Громов А.И., Морозов С.П., Владзимирский А.В. Режим обнаружения твердых минеральных включений при медицинской акустической визуализации. Акустический журнал. 2018; 64 (5): 618–631. http://doi.org/10.1134/S0320791918050064</mixed-citation><mixed-citation xml:lang="en">Leonov D.V., Kulberg N.S., Gromov A.I., Morozov S.P., Vladzimirsky A.V. Mode of detection of solid mineral inclusions in medical acoustic imaging Akusticheskij Zhurnal. 2018; 64 (5): 618–631. http://doi.org/10.1134/S0320791918050064 (In Russian)</mixed-citation></citation-alternatives></ref><ref id="cit46"><label>46</label><citation-alternatives><mixed-citation xml:lang="ru">Salmaslıoğlu A., Bulakçı M., Bakır B. et al. The usefulness of agent emission imaging-high mechanical index ultrasound mode in the diagnosis of urolithiasis: a prospective preliminary study. Diagn. Intervent. Radiol. 2018; 24 (3): 169–174. http://doi.org/10.5152/dir.2018.18005</mixed-citation><mixed-citation xml:lang="en">Salmaslıoğlu A., Bulakçı M., Bakır B. et al. The usefulness of agent emission imaging-high mechanical index ultrasound mode in the diagnosis of urolithiasis: a prospective preliminary study. Diagn. Intervent. Radiol. 2018; 24 (3): 169–174. http://doi.org/10.5152/dir.2018.18005</mixed-citation></citation-alternatives></ref><ref id="cit47"><label>47</label><citation-alternatives><mixed-citation xml:lang="ru">Kim H.C., Yang D.M., Jin W. et al. Color Doppler twinkling artifacts in various conditions during abdominal and pelvic sonography. J. Ultrasound Med. 2010; 29 (4): 621–632. http://doi.org/10.7863/jum.2010.29.4.621</mixed-citation><mixed-citation xml:lang="en">Kim H.C., Yang D.M., Jin W. et al. Color Doppler twinkling artifacts in various conditions during abdominal and pelvic sonography. J. Ultrasound Med. 2010; 29 (4): 621–632. http://doi.org/10.7863/jum.2010.29.4.621</mixed-citation></citation-alternatives></ref><ref id="cit48"><label>48</label><citation-alternatives><mixed-citation xml:lang="ru">Леонов Д.В. Ультразвуковая медицинская диагностическая система на основе доплеровского мерцающего артефакта: Автореф. дис. ... канд. техн. наук. М., 2018. 16 с.</mixed-citation><mixed-citation xml:lang="en">Leonov D.V. Ultrasound medical diagnostic system based on Doppler twinkling artifact: Abstract of Diss. Cand. Techn. Sci. M., 2018. 16 p. (In Russian)</mixed-citation></citation-alternatives></ref><ref id="cit49"><label>49</label><citation-alternatives><mixed-citation xml:lang="ru">Tsao T.F., Kang R.J., Gueng M.K. et al. Color Doppler twinkling artifact and clinical use. J. Med. Ultrasound. 2009; 17 (3): 157–166. https://doi.org/10.1016/S0929-6441(09)60122-3</mixed-citation><mixed-citation xml:lang="en">Tsao T.F., Kang R.J., Gueng M.K. et al. Color Doppler twinkling artifact and clinical use. J. Med. Ultrasound. 2009; 17 (3): 157–166. https://doi.org/10.1016/S0929-6441(09)60122-3</mixed-citation></citation-alternatives></ref><ref id="cit50"><label>50</label><citation-alternatives><mixed-citation xml:lang="ru">Yang J.H., Kang G., Choi M.J. The role of the acoustic radiation force in color Doppler twinkling artifacts. Ultrasonography. 2015; 34 (2): 109–114. http://doi.org/10.14366/usg.14065</mixed-citation><mixed-citation xml:lang="en">Yang J.H., Kang G., Choi M.J. The role of the acoustic radiation force in color Doppler twinkling artifacts. Ultrasonography. 2015; 34 (2): 109–114. http://doi.org/10.14366/usg.14065</mixed-citation></citation-alternatives></ref><ref id="cit51"><label>51</label><citation-alternatives><mixed-citation xml:lang="ru">Bacha R., Gilani S.A., Manzoor I. Relation of color Doppler twinkling artifact and scale or pulse repetition frequency. J. Med. Ultrasound. 2019; 27 (1): 13–18. http://doi.org/10.4103/JMU.JMU_129_18</mixed-citation><mixed-citation xml:lang="en">Bacha R., Gilani S.A., Manzoor I. Relation of color Doppler twinkling artifact and scale or pulse repetition frequency. J. Med. Ultrasound. 2019; 27 (1): 13–18. http://doi.org/10.4103/JMU.JMU_129_18</mixed-citation></citation-alternatives></ref><ref id="cit52"><label>52</label><citation-alternatives><mixed-citation xml:lang="ru">Gao J., Hentel K., Rubin J.M. Correlation between twinkling artifact and color Doppler carrier frequency: preliminary observations in renal calculi. Ultrasound Med. Biol. 2012; 38 (9): 1534–1539. http://doi.org/10.1016/j.ultrasmedbio.2012.04.011</mixed-citation><mixed-citation xml:lang="en">Gao J., Hentel K., Rubin J.M. Correlation between twinkling artifact and color Doppler carrier frequency: preliminary observations in renal calculi. Ultrasound Med. Biol. 2012; 38 (9): 1534–1539. http://doi.org/10.1016/j.ultrasmedbio.2012.04.011</mixed-citation></citation-alternatives></ref><ref id="cit53"><label>53</label><citation-alternatives><mixed-citation xml:lang="ru">Rokni E., Zinck S., Simon J.C. Evaluation of stone features that cause the color Doppler ultrasound twinkling artifact. Ultrasound Med. Biol. 2021; 47 (5): 1310–1318. http://doi.org/10.1016/j.ultrasmedbio.2021.01.016</mixed-citation><mixed-citation xml:lang="en">Rokni E., Zinck S., Simon J.C. Evaluation of stone features that cause the color Doppler ultrasound twinkling artifact. Ultrasound Med. Biol. 2021; 47 (5): 1310–1318. http://doi.org/10.1016/j.ultrasmedbio.2021.01.016</mixed-citation></citation-alternatives></ref><ref id="cit54"><label>54</label><citation-alternatives><mixed-citation xml:lang="ru">Davran R. The usefulness of color Doppler twinkling artifact in the diagnosis of urinary calculi. Eur. J. Radiol. 2009; 71 (2): 378. https://doi.org/10.1016/j.ejrad.2008.06.021</mixed-citation><mixed-citation xml:lang="en">Davran R. The usefulness of color Doppler twinkling artifact in the diagnosis of urinary calculi. Eur. J. Radiol. 2009; 71 (2): 378. https://doi.org/10.1016/j.ejrad.2008.06.021</mixed-citation></citation-alternatives></ref><ref id="cit55"><label>55</label><citation-alternatives><mixed-citation xml:lang="ru">Granata A., Maccarrone R., Raspanti F.G. et al. Ultrasonography for diagnosis and management of nephrolithiasis: state of the art and new perspectives. G. Ital. Nefrol. 2020; 37 (Suppl. 75).</mixed-citation><mixed-citation xml:lang="en">Granata A., Maccarrone R., Raspanti F.G. et al. Ultrasonography for diagnosis and management of nephrolithiasis: state of the art and new perspectives. G. Ital. Nefrol. 2020; 37 (Suppl. 75).</mixed-citation></citation-alternatives></ref><ref id="cit56"><label>56</label><citation-alternatives><mixed-citation xml:lang="ru">Wang M., Ma Q., Chen Y. et al. Value of the color Doppler imaging mode in improving physicians’ diagnostic performance in patients with mid-ureteric stones larger than 5 mm: a retrospective study. Urolithiasis. 2021; 49 (5): 463–469. http://doi.org/10.1007/s00240-021-01250-w</mixed-citation><mixed-citation xml:lang="en">Wang M., Ma Q., Chen Y. et al. Value of the color Doppler imaging mode in improving physicians’ diagnostic performance in patients with mid-ureteric stones larger than 5 mm: a retrospective study. Urolithiasis. 2021; 49 (5): 463–469. http://doi.org/10.1007/s00240-021-01250-w</mixed-citation></citation-alternatives></ref><ref id="cit57"><label>57</label><citation-alternatives><mixed-citation xml:lang="ru">Ng C., Tsung J.W. Avoiding computed tomography scans by using point-of-care ultrasound when evaluating suspected pediatric renal colic. J. Emergenc. Med. 2015; 49 (2): 165–171. http://doi.org/10.1016/j.jemermed.2015.01.017</mixed-citation><mixed-citation xml:lang="en">Ng C., Tsung J.W. Avoiding computed tomography scans by using point-of-care ultrasound when evaluating suspected pediatric renal colic. J. Emergenc. Med. 2015; 49 (2): 165–171. http://doi.org/10.1016/j.jemermed.2015.01.017</mixed-citation></citation-alternatives></ref><ref id="cit58"><label>58</label><citation-alternatives><mixed-citation xml:lang="ru">Chan W., Stone M.B. Male with fever and flank pain. Ann. Emergenc. Med. 2016; 67 (1): E1–E2. https://doi.org/10.1016/j.annemergmed.2015.07.505</mixed-citation><mixed-citation xml:lang="en">Chan W., Stone M.B. Male with fever and flank pain. Ann. Emergenc. Med. 2016; 67 (1): E1–E2. https://doi.org/10.1016/j.annemergmed.2015.07.505</mixed-citation></citation-alternatives></ref><ref id="cit59"><label>59</label><citation-alternatives><mixed-citation xml:lang="ru">Sen V., Imamoglu C., Kucukturkmen I. et al. Can Doppler ultrasonography twinkling artifact be used as an alternative imaging modality to non-contrast-enhanced computed tomography in patients with ureteral stones? A prospective clinical study. Urolithiasis. 2017; 45 (2): 215–219. http://doi.org/10.1007/s00240-016-0891-8</mixed-citation><mixed-citation xml:lang="en">Sen V., Imamoglu C., Kucukturkmen I. et al. Can Doppler ultrasonography twinkling artifact be used as an alternative imaging modality to non-contrast-enhanced computed tomography in patients with ureteral stones? A prospective clinical study. Urolithiasis. 2017; 45 (2): 215–219. http://doi.org/10.1007/s00240-016-0891-8</mixed-citation></citation-alternatives></ref><ref id="cit60"><label>60</label><citation-alternatives><mixed-citation xml:lang="ru">Liu N., Zhang Y., Shan K. et al. Sonographic twinkling artifact for diagnosis of acute ureteral calculus. Wld J. Urol. 2020; 38 (2): 489–495. http://doi.org/10.1007/s00345-019-02773-z</mixed-citation><mixed-citation xml:lang="en">Liu N., Zhang Y., Shan K. et al. Sonographic twinkling artifact for diagnosis of acute ureteral calculus. Wld J. Urol. 2020; 38 (2): 489–495. http://doi.org/10.1007/s00345-019-02773-z</mixed-citation></citation-alternatives></ref><ref id="cit61"><label>61</label><citation-alternatives><mixed-citation xml:lang="ru">Gliga M.L., Chirila C N., Podeanu D.M. et al. Twinkle, twinkle little stone: an artifact improves the ultrasound performance! Med. Ultrasonography. 2017; 19 (3): 272–275. http://doi.org/10.11152/mu-984</mixed-citation><mixed-citation xml:lang="en">Gliga M.L., Chirila C N., Podeanu D.M. et al. Twinkle, twinkle little stone: an artifact improves the ultrasound performance! Med. Ultrasonography. 2017; 19 (3): 272–275. http://doi.org/10.11152/mu-984</mixed-citation></citation-alternatives></ref><ref id="cit62"><label>62</label><citation-alternatives><mixed-citation xml:lang="ru">Bacha R., Manzoor I., Gilani S.A., Khan A.I. Clinical significance of twinkling artifact in the diagnosis of urinary stones. Ultrasound Med. Biol. 2019; 45 (12): 3199–3206. http://doi.org/10.1016/j.ultrasmedbio.2019.08.015</mixed-citation><mixed-citation xml:lang="en">Bacha R., Manzoor I., Gilani S.A., Khan A.I. Clinical significance of twinkling artifact in the diagnosis of urinary stones. Ultrasound Med. Biol. 2019; 45 (12): 3199–3206. http://doi.org/10.1016/j.ultrasmedbio.2019.08.015</mixed-citation></citation-alternatives></ref><ref id="cit63"><label>63</label><citation-alternatives><mixed-citation xml:lang="ru">Al Saiady M., Alqatie A., Almushayqih M. Twinkle artifact in renal ultrasound, is it a solid point for the diagnosis of renal stone in children? J. Ultrasonography. 2021; 21 (87): e282–e285. http://doi.org/10.15557/JoU.2021.0048</mixed-citation><mixed-citation xml:lang="en">Al Saiady M., Alqatie A., Almushayqih M. Twinkle artifact in renal ultrasound, is it a solid point for the diagnosis of renal stone in children? J. Ultrasonography. 2021; 21 (87): e282–e285. http://doi.org/10.15557/JoU.2021.0048</mixed-citation></citation-alternatives></ref><ref id="cit64"><label>64</label><citation-alternatives><mixed-citation xml:lang="ru">Yavuz A., Ceken K., Alimoglu E., Kabaalioglu A. The reliability of color doppler “twinkling” artifact for diagnosing millimetrical nephrolithiasis: comparison with B-Mode US and CT scanning results. J. Med. Ultrasonics. 2015; 42 (2): 215–222. http://doi.org/10.1007/s10396-014-0599-8</mixed-citation><mixed-citation xml:lang="en">Yavuz A., Ceken K., Alimoglu E., Kabaalioglu A. The reliability of color doppler “twinkling” artifact for diagnosing millimetrical nephrolithiasis: comparison with B-Mode US and CT scanning results. J. Med. Ultrasonics. 2015; 42 (2): 215–222. http://doi.org/10.1007/s10396-014-0599-8</mixed-citation></citation-alternatives></ref><ref id="cit65"><label>65</label><citation-alternatives><mixed-citation xml:lang="ru">Hanafi M.Q., Fakhrizadeh A., Jaafaezadeh E. An investigation into the clinical accuracy of twinkling artifacts in patients with urolithiasis smaller than 5 mm in comparison with computed tomography scanning. J. Family Med. Prim. Care. 2019; 8 (2): 401–406. http://doi.org/10.4103/jfmpc.jfmpc_300_18</mixed-citation><mixed-citation xml:lang="en">Hanafi M.Q., Fakhrizadeh A., Jaafaezadeh E. An investigation into the clinical accuracy of twinkling artifacts in patients with urolithiasis smaller than 5 mm in comparison with computed tomography scanning. J. Family Med. Prim. Care. 2019; 8 (2): 401–406. http://doi.org/10.4103/jfmpc.jfmpc_300_18</mixed-citation></citation-alternatives></ref><ref id="cit66"><label>66</label><citation-alternatives><mixed-citation xml:lang="ru">Laher A.E., McDowall J., Gerber L. et al. The ultrasound ‘twinkling artefact’ in the diagnosis of urolithiasis: hocus or valuable point-of-care-ultrasound? A systematic review and meta-analysis. Eur. J. Emerg. Med. 2020; 27 (1): 13–20. http://doi.org/10.1097/MEJ.0000000000000601</mixed-citation><mixed-citation xml:lang="en">Laher A.E., McDowall J., Gerber L. et al. The ultrasound ‘twinkling artefact’ in the diagnosis of urolithiasis: hocus or valuable point-of-care-ultrasound? A systematic review and meta-analysis. Eur. J. Emerg. Med. 2020; 27 (1): 13–20. http://doi.org/10.1097/MEJ.0000000000000601</mixed-citation></citation-alternatives></ref><ref id="cit67"><label>67</label><citation-alternatives><mixed-citation xml:lang="ru">Bulakçı M., Tefik T., Akbulut F. et al. The use of non-contrast computed tomography and color Doppler ultra-sound in the characterization of urinary stones-preliminary results. Turkish J. Urology. 2015; 41 (4): 165–170. http://doi.org/10.5152/tud.2015.91297</mixed-citation><mixed-citation xml:lang="en">Bulakçı M., Tefik T., Akbulut F. et al. The use of non-contrast computed tomography and color Doppler ultra-sound in the characterization of urinary stones-preliminary results. Turkish J. Urology. 2015; 41 (4): 165–170. http://doi.org/10.5152/tud.2015.91297</mixed-citation></citation-alternatives></ref><ref id="cit68"><label>68</label><citation-alternatives><mixed-citation xml:lang="ru">Hassani H., Raynal G., Spie R. et al. Imaging-based assessment of the mineral composition of urinary stones: an in vitro study of the combination of Hounsfield unit measurement in noncontrast helical computerized tomography and the twinkling artifact in color Doppler ultrasound. Ultrasound Med. Biol. 2012; 38 (5): 803–810. http://doi.org/10.1016/j.ultrasmedbio.2012.01.009</mixed-citation><mixed-citation xml:lang="en">Hassani H., Raynal G., Spie R. et al. Imaging-based assessment of the mineral composition of urinary stones: an in vitro study of the combination of Hounsfield unit measurement in noncontrast helical computerized tomography and the twinkling artifact in color Doppler ultrasound. Ultrasound Med. Biol. 2012; 38 (5): 803–810. http://doi.org/10.1016/j.ultrasmedbio.2012.01.009</mixed-citation></citation-alternatives></ref><ref id="cit69"><label>69</label><citation-alternatives><mixed-citation xml:lang="ru">Shang M., Sun X., Liu Q. et al. Quantitative evaluation of the effects of urinary stone composition and size on color Doppler twinkling artifact: A phantom study. J. Ultrasound Med. 2017; 36 (4): 733–740. http://doi.org/10.7863/ultra.16.01039</mixed-citation><mixed-citation xml:lang="en">Shang M., Sun X., Liu Q. et al. Quantitative evaluation of the effects of urinary stone composition and size on color Doppler twinkling artifact: A phantom study. J. Ultrasound Med. 2017; 36 (4): 733–740. http://doi.org/10.7863/ultra.16.01039</mixed-citation></citation-alternatives></ref><ref id="cit70"><label>70</label><citation-alternatives><mixed-citation xml:lang="ru">Jamzad A., Setarehdan S.K. Noninvasive prediction of renal stone surface irregularities by numerical analysis of the color Doppler twinkling artifact: an ex vivo study. J. Ultrasound Med. 2018; 37 (5): 1211–1224. http://doi.org/10.1002/jum.14465</mixed-citation><mixed-citation xml:lang="en">Jamzad A., Setarehdan S.K. Noninvasive prediction of renal stone surface irregularities by numerical analysis of the color Doppler twinkling artifact: an ex vivo study. J. Ultrasound Med. 2018; 37 (5): 1211–1224. http://doi.org/10.1002/jum.14465</mixed-citation></citation-alternatives></ref><ref id="cit71"><label>71</label><citation-alternatives><mixed-citation xml:lang="ru">Kim H.J., Lee J.Y., Jang J.Y. et al. Color Doppler twinkling artifacts from gallstones: in vitro analysis regarding their compositions and architectures. Ultrasound Med. Biol. 2010; 36 (12): 2117–2122. http://doi.org/10.1016/j.ultrasmedbio.2010.08.021</mixed-citation><mixed-citation xml:lang="en">Kim H.J., Lee J.Y., Jang J.Y. et al. Color Doppler twinkling artifacts from gallstones: in vitro analysis regarding their compositions and architectures. Ultrasound Med. Biol. 2010; 36 (12): 2117–2122. http://doi.org/10.1016/j.ultrasmedbio.2010.08.021</mixed-citation></citation-alternatives></ref><ref id="cit72"><label>72</label><citation-alternatives><mixed-citation xml:lang="ru">Yu M.H., Lee J.Y., Yoon J.H. et al. Color Doppler twinkling artifacts from gallbladder adenomyomatosis with 1.8 MHz and 4.0 MHz color Doppler frequencies. Ultrasound Med. Biol. 2012; 38 (7): 1188–1194. http://doi.org/10.1016/j.ultrasmedbio.2012.03.010</mixed-citation><mixed-citation xml:lang="en">Yu M.H., Lee J.Y., Yoon J.H. et al. Color Doppler twinkling artifacts from gallbladder adenomyomatosis with 1.8 MHz and 4.0 MHz color Doppler frequencies. Ultrasound Med. Biol. 2012; 38 (7): 1188–1194. http://doi.org/10.1016/j.ultrasmedbio.2012.03.010</mixed-citation></citation-alternatives></ref><ref id="cit73"><label>73</label><citation-alternatives><mixed-citation xml:lang="ru">Ghersin E., Soudack M., Gaitini, D. Twinkling artifact in gallbladder adenomyomatosis. J. Ultrasound Med. 2003; 22 (2): 229–231. http://doi.org/10.7863/jum.2003.22.2.229</mixed-citation><mixed-citation xml:lang="en">Ghersin E., Soudack M., Gaitini, D. Twinkling artifact in gallbladder adenomyomatosis. J. Ultrasound Med. 2003; 22 (2): 229–231. http://doi.org/10.7863/jum.2003.22.2.229</mixed-citation></citation-alternatives></ref><ref id="cit74"><label>74</label><citation-alternatives><mixed-citation xml:lang="ru">Hammad A.Y., Miura J.T., Turaga K.K. et al. A literature review of radiological findings to guide the diagnosis of gallbladder adenomyomatosis. HPB. 2016; 18 (2): 129–135. http://doi.org/10.1016/j.hpb.2015.09.006</mixed-citation><mixed-citation xml:lang="en">Hammad A.Y., Miura J.T., Turaga K.K. et al. A literature review of radiological findings to guide the diagnosis of gallbladder adenomyomatosis. HPB. 2016; 18 (2): 129–135. http://doi.org/10.1016/j.hpb.2015.09.006</mixed-citation></citation-alternatives></ref><ref id="cit75"><label>75</label><citation-alternatives><mixed-citation xml:lang="ru">Ozan E., Atac G.K., and Gundogdu S. Twinkling artifact on color Doppler ultrasound: an advantage or a pitfall? J. Med. Ultrasonics. 2016; 43 (3): 361–371. http://doi.org/10.1007/s10396-016-0715-z</mixed-citation><mixed-citation xml:lang="en">Ozan E., Atac G.K., and Gundogdu S. Twinkling artifact on color Doppler ultrasound: an advantage or a pitfall? J. Med. Ultrasonics. 2016; 43 (3): 361–371. http://doi.org/10.1007/s10396-016-0715-z</mixed-citation></citation-alternatives></ref><ref id="cit76"><label>76</label><citation-alternatives><mixed-citation xml:lang="ru">Tsujimoto F. Microcalcifications in the breast detected by a color Doppler method using twinkling artifacts: some important discussions based on clinical cases and experiments with a new ultrasound modality called multidetector-ultrasonography (MD-US). J. Med. Ultrasonics. 2014; 41 (1): 99–108. http://doi.org/10.1007/s10396-013-0476-x</mixed-citation><mixed-citation xml:lang="en">Tsujimoto F. Microcalcifications in the breast detected by a color Doppler method using twinkling artifacts: some important discussions based on clinical cases and experiments with a new ultrasound modality called multidetector-ultrasonography  (MD-US).  J.  Med. Ultrasonics. 2014; 41 (1): 99–108. http://doi.org/10.1007/s10396-013-0476-x</mixed-citation></citation-alternatives></ref><ref id="cit77"><label>77</label><citation-alternatives><mixed-citation xml:lang="ru">Relea A., Alonso J.A., González M. et al. Usefulness of the twinkling artifact on Doppler ultrasound for the detection of breast microcalcifications. Radiología (English Edition). 2018; 60 (5): 413–423. http://doi.org/10.1016/j.rx.2018.04.004</mixed-citation><mixed-citation xml:lang="en">Relea A., Alonso J.A., González M. et al. Usefulness of the twinkling artifact on Doppler ultrasound for the detection of breast microcalcifications. Radiología (English Edition). 2018; 60 (5): 413–423. http://doi.org/10.1016/j.rx.2018.04.004</mixed-citation></citation-alternatives></ref><ref id="cit78"><label>78</label><citation-alternatives><mixed-citation xml:lang="ru">Kang J., Han K., Song I. et al. Real-time ultrasound detection of breast microcalcifications using multifocus twinkling artifact imaging. IEEE Transact. Med. Imaging. 2022; 41 (5): 1300–1308. http://doi.org/10.1109/TMI.2021.3136901</mixed-citation><mixed-citation xml:lang="en">Kang J., Han K., Song I. et al. Real-time ultrasound detection of breast microcalcifications using multifocus twinkling artifact imaging. IEEE Transact. Med. Imaging. 2022; 41 (5): 1300–1308. http://doi.org/10.1109/TMI.2021.3136901</mixed-citation></citation-alternatives></ref><ref id="cit79"><label>79</label><citation-alternatives><mixed-citation xml:lang="ru">Громов А.И., Комин Ю.А., Мозеров С.А., Красницкая С.К. Ультразвуковой мерцающий артефакт в дифференциальной диагностике кальцинатов молочных желез. Медицинская визуализация. 2021; 25 (3): 157–166. https://doi.org/10.24835/1607-0763-1025</mixed-citation><mixed-citation xml:lang="en">Gromov A.I., Komin Yu.A., Mozerov S.A., Gromov A.I., Komin Yu.A., Mozerov S.A., Krasnickaya S.K. Twinkling artifact in differential diagnosis of mammary calcinates. Medical Visualization. 2021; 25 (3): 157–166. https://doi.org/10.24835/1607-0763-1025 (In Russian)</mixed-citation></citation-alternatives></ref><ref id="cit80"><label>80</label><citation-alternatives><mixed-citation xml:lang="ru">Yanik B., Conkbayir I., Çakmakçi E. et al. Color Doppler twinkling artifact in a calcified liver mass. J. Clin. Ultrasound. 2005; 33 (9): 474–476. http://doi.org/10.1002/jcu.20172</mixed-citation><mixed-citation xml:lang="en">Yanik B., Conkbayir I., Çakmakçi E. et al. Color Doppler twinkling artifact in a calcified liver mass. J. Clin. Ultrasound.  2005;  33  (9):  474–476.  http://doi.org/10.1002/jcu.20172</mixed-citation></citation-alternatives></ref><ref id="cit81"><label>81</label><citation-alternatives><mixed-citation xml:lang="ru">Tsao T.F., Kang R.J., Tyan Y.S. et al. Color Doppler twinkling artifact related to chronic pancreatitis with parenchymal calcification. Acta Radiol. 2006; 47 (6): 547–548. http://doi.org/10.1080/02841850600690371</mixed-citation><mixed-citation xml:lang="en">Tsao T.F., Kang R.J., Tyan Y.S. et al. Color Doppler twinkling artifact related to chronic pancreatitis with parenchymal calcification. Acta Radiol. 2006; 47 (6): 547–548. http://doi.org/10.1080/02841850600690371</mixed-citation></citation-alternatives></ref><ref id="cit82"><label>82</label><citation-alternatives><mixed-citation xml:lang="ru">Pabst G., Strobel K., Zehnder J. The value of the twinkling artefact for the diagnosis of sialolithiasis of the large salivary glands. J. Laryngol. Otol. 2018; 132 (2): 162–167. http://doi.org/10.1017/S002221511700250X</mixed-citation><mixed-citation xml:lang="en">Pabst G., Strobel K., Zehnder J. The value of the twinkling artefact for the diagnosis of sialolithiasis of the large salivary glands. J. Laryngol. Otol. 2018; 132 (2): 162–167. http://doi.org/10.1017/S002221511700250X</mixed-citation></citation-alternatives></ref><ref id="cit83"><label>83</label><citation-alternatives><mixed-citation xml:lang="ru">Tian J., Xu L. Color Doppler twinkling artifact in diagnosis of tuberculous pleuritis: A comparison with gray-scale ultrasonography and computed tomography. Ultrasound Med. Biol. 2018; 44 (6): 1291–1295. http://doi.org/10.1016/j.ultrasmedbio.2018.01.003</mixed-citation><mixed-citation xml:lang="en">Tian J., Xu L. Color Doppler twinkling artifact in diagnosis of tuberculous pleuritis: A comparison with gray-scale ultrasonography and computed tomography. Ultrasound Med. Biol. 2018; 44 (6): 1291–1295. http://doi.org/10.1016/j.ultrasmedbio.2018.01.003</mixed-citation></citation-alternatives></ref><ref id="cit84"><label>84</label><citation-alternatives><mixed-citation xml:lang="ru">Serter S., Orguc S., Gumus B. et al. Doppler sonographic findings in testicular microlithiasis. Int. Braz. J. Urol. 2008; 34 (4): 477–484. http://doi.org/10.1590/s1677-55382008000400010</mixed-citation><mixed-citation xml:lang="en">Serter S., Orguc S., Gumus B. et al. Doppler sonographic findings in testicular microlithiasis. Int. Braz. J. Urol. 2008; 34 (4): 477–484. http://doi.org/10.1590/s1677-55382008000400010</mixed-citation></citation-alternatives></ref><ref id="cit85"><label>85</label><citation-alternatives><mixed-citation xml:lang="ru">O’Flynn E.A., Sidhu P.S. The sonographic twinkling artifact in testicular calcification. J. Ultrasound Med. 2009; 28 (4): 515–517. http://doi.org/10.7863/jum.2009.28.4.515</mixed-citation><mixed-citation xml:lang="en">O’Flynn E.A., Sidhu P.S. The sonographic twinkling artifact in testicular calcification. J. Ultrasound Med. 2009; 28 (4): 515–517. http://doi.org/10.7863/jum.2009.28.4.515</mixed-citation></citation-alternatives></ref><ref id="cit86"><label>86</label><citation-alternatives><mixed-citation xml:lang="ru">Tsao T.F., Wu Y.L., Yu J.M. et al. Color Doppler twinkling artifact of calcified cardiac valves in vitro: a not well known phenomenon in echocardiography. Ultrasound Med. Biol. 2011; 37 (3): 386–392. http://doi.org/10.1016/j.ultrasmedbio.2010.12.001</mixed-citation><mixed-citation xml:lang="en">Tsao T.F., Wu Y.L., Yu J.M. et al. Color Doppler twinkling artifact of calcified cardiac valves in vitro: a not well known phenomenon in echocardiography. Ultrasound Med. Biol. 2011; 37 (3): 386–392. http://doi.org/10.1016/j.ultrasmedbio.2010.12.001</mixed-citation></citation-alternatives></ref><ref id="cit87"><label>87</label><citation-alternatives><mixed-citation xml:lang="ru">Nagafuchi Y., Sumitomo S., Soroida Y. et al. The power Doppler twinkling artefact associated with periarticular calcification induced by intra-articular corticosteroid injection in patients with rheumatoid arthritis. Ann. Rheumat. Dis. 2013; 72 (7): 1267–1269. http://doi.org/10.1136/annrheumdis-2012-202897</mixed-citation><mixed-citation xml:lang="en">Nagafuchi Y., Sumitomo S., Soroida Y. et al. The power Doppler twinkling artefact associated with periarticular calcification induced by intra-articular corticosteroid injection in patients with rheumatoid arthritis. Ann. Rheumat. Dis. 2013; 72 (7): 1267–1269. http://doi.org/10.1136/annrheumdis-2012-202897</mixed-citation></citation-alternatives></ref><ref id="cit88"><label>88</label><citation-alternatives><mixed-citation xml:lang="ru">Sharma G., Sharma A. Clinical implications and applications of the twinkling sign in ureteral calculus: a preliminary study. J. Urol. 2013; 189 (6): 2132–2135. http://doi.org/10.1016/j.juro.2012.11.176</mixed-citation><mixed-citation xml:lang="en">Sharma G., Sharma A. Clinical implications and applications of the twinkling sign in ureteral calculus: a preliminary study. J. Urol. 2013; 189 (6): 2132–2135. http://doi.org/10.1016/j.juro.2012.11.176</mixed-citation></citation-alternatives></ref><ref id="cit89"><label>89</label><citation-alternatives><mixed-citation xml:lang="ru">Li T., Khokhlova T.D., Sapozhnikov O.A. et al. A new active cavitation mapping technique for pulsed HIFU applications – Bubble Doppler. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. 2014; 61 (10): 1698–1708. http://doi.org/10.1109/TUFFC.2014.006502</mixed-citation><mixed-citation xml:lang="en">Li T., Khokhlova T.D., Sapozhnikov O.A. et al. A new active cavitation  mapping  technique  for  pulsed  HIFU applications – Bubble Doppler. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. 2014; 61 (10): 1698–1708. http://doi.org/10.1109/TUFFC.2014.006502</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
