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<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">10.24835/1607-0763-1263</article-id><article-id custom-type="elpub" pub-id-type="custom">medvis-1263</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>ТЕХНОЛОГИИ ЛУЧЕВОЙ ДИАГНОСТИКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>RADIOLOGICAL TECHNOLOGIES</subject></subj-group></article-categories><title-group><article-title>Распознавание областей текста с персональными данными на диагностических изображениях</article-title><trans-title-group xml:lang="en"><trans-title>Recognition of text areas with personal data on diagnostic images</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9481-1637</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Новик</surname><given-names>В. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Novik</surname><given-names>V. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Новик Владимир Петрович – научный сотрудник отдела медицинской информатики, радиомики и радиогеномики</p><p>109029 Москва, Средняя Калитниковская ул., д. 28, стр. 1</p></bio><bio xml:lang="en"><p>Vladimir P. Novik – Researcher of the Department of Medical Informatics, Radiomics and Radiogenomics</p><p>24, Petrovka str., Moscow 127051</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7046-7157</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кульберг</surname><given-names>Н. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kulberg</surname><given-names>N. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кульберг Николай Сергеевич – канд. физ.-мат. наук, старший научный сотрудник Института кибернетики и образовательной информатики</p><p>119333 Москва, ул. Вавилова, д. 44, корп. 2</p></bio><bio xml:lang="en"><p>Nicholas S. Kulberg – Cand. of Sci. (Phys.-Math.), Senior Researcher of the Institute of Cybernetics and Educational Informatics</p><p>44, Vavilova str., Moscow 125367</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/0000-0001-7786-0349</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Арзамасов</surname><given-names>К. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Arzamasov</surname><given-names>K. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Арзамасов Кирилл Михайлович – канд. мед. наук, руководитель отдела медицинской информатики, радиомики и радиогеномики</p><p>109029 Москва, Средняя Калитниковская ул., д. 28, стр. 1</p></bio><bio xml:lang="en"><p>Kirill M. Arzamasov – Cand. of Sci. (Med.), Head of the Department of Medical Informatics, Radiomics and Radiogenomics</p><p>24, Petrovka str., Moscow 127051</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3097-8881</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Четвериков</surname><given-names>С. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Chetverikov</surname><given-names>S. F.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Четвериков Сергей Федорович – начальник сектора разработки систем внедрения медицинских интеллектуальных технологий отдела медицинской информатики, радиомики и радиогеномики</p><p>109029 Москва, Средняя Калитниковская ул., д. 28, стр. 1</p></bio><bio xml:lang="en"><p>Sergey F. Chetverikov – Head of the Sector for the development of systems for the introduction of medical intelligent technologies of the Department of Medical Informatics, Radiomics and Radiogenomics</p><p>24, Petrovka str., Moscow 127051</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4857-5404</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хоружая</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Khoruzhaya</surname><given-names>A. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хоружая Анна Николаевна – младший научный сотрудник отдела инновационных технологий</p><p>109029 Москва, Средняя Калитниковская ул., д. 28, стр. 1</p><p>тел.: +7-977-423-32-78</p></bio><bio xml:lang="en"><p>Anna N. Khoruzhaya – Junior Researcher of the Department of Innovative Technologies</p><p>24, Petrovka str., Moscow 127051</p><p>phone: +7-977-423-32-78</p></bio><email xlink:type="simple">khoruanna69@yandex.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/0000-0002-4647-7301</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Козлов</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kozlov</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Козлов Дмитрий Владимирович – младший научный сотрудник отдела медицинской информатики, радиомики и радиогеномики</p><p>109029 Москва, Средняя Калитниковская ул., д. 28, стр. 1</p></bio><bio xml:lang="en"><p>Dmitriy V. Kozlov – Junior Researcher of the Department of Medical Informatics, Radiomics and Radiogenomics</p><p>24, Petrovka str., Moscow 127051</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9396-6063</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кремнева</surname><given-names>Е. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kremneva</surname><given-names>E. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кремнева Елена Игоревна – канд. мед. наук, ведущий научный сотрудник отдела инновационных технологий ГБУЗ города Москвы “Научно-практический клинический центр диагностики и телемедицинских технологий ДЗ города Москвы”; старший научный сотрудник ФГБНУ “Научный центр неврологии”</p><p>109029 Москва, Средняя Калитниковская ул., д. 28, стр. 1125367 Москва, Волоколамское шоссе, д. 80, стр. 1</p></bio><bio xml:lang="en"><p>Elena I. Kremneva – Cand. of Sci. (Med.), Leading Researcher of the Department of Innovative Technologies, Research and Practical Clinical Center for Diagnostics and Telemedicine Technologies of Moscow Health Care Department; Senior Researcher, Research center of neurology</p><p>24, Petrovka str., Moscow 12705180-1, Volokolamskoye shosse, Moscow 125367</p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ГБУЗ “Научно-практический клинический центр диагностики и телемедицинских технологий ДЗ города Москвы”</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Research and Practical Clinical Center for Diagnostics and Telemedicine Technologies of Moscow Health Care Department</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГУ “Федеральный исследовательский центр “Информатика и управление” Российской академии наук”</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Federal Research Center “Computer Science and Control” of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>ГБУЗ “Научно-практический клинический центр диагностики и телемедицинских технологий ДЗ города Москвы”; ФГБНУ “Научный центр неврологии”</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Research and Practical Clinical Center for Diagnostics and Telemedicine Technologies of Moscow Health Care Department; Research center of neurology</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>17</day><month>07</month><year>2023</year></pub-date><volume>27</volume><issue>4</issue><fpage>150</fpage><lpage>158</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Новик В.П., Кульберг Н.С., Арзамасов К.М., Четвериков С.Ф., Хоружая А.Н., Козлов Д.В., Кремнева Е.И., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Новик В.П., Кульберг Н.С., Арзамасов К.М., Четвериков С.Ф., Хоружая А.Н., Козлов Д.В., Кремнева Е.И.</copyright-holder><copyright-holder xml:lang="en">Novik V.P., Kulberg N.S., Arzamasov K.M., Chetverikov S.F., Khoruzhaya A.N., Kozlov D.V., Kremneva E.I.</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/1263">https://medvis.rdsmedia.ru/jour/article/view/1263</self-uri><abstract><sec><title>Цель исследования</title><p>Цель исследования: разработка метода обнаружения областей текста с приватными данными на медицинских диагностических изображениях при помощи модуля Tesseract и модифицированного расстояния Левенштейна.</p></sec><sec><title>Материал и методы</title><p>Материал и методы. Для пороговой фильтрации на начальном этапе определяется яркость точек, принадлежащих символам текста на изображениях. Динамический порог вычисляется по гистограмме яркостей пикселей изображения. Далее для первичного распознавания текста используется модуль Tesseract. На основании значений тэгов из DICOM-файлов формировался набор строк для поиска их в распознанном тексте. Для поиска этих строк использовалось модифицированное расстояние Левенштейна. Для тестирования алгоритма применялся набор DICOM файлов типа “Dose Report” модальности CT. Оценку точности проводили эксперты, размечающие блоки приватной информации на изображениях.</p></sec><sec><title>Результаты</title><p>Результаты. Разработан инструмент с набором метрик и оптимальных порогов для выбора решающих правил в нахождении совпадений, позволяющих обнаруживать области текста с приватными данными на медицинских изображениях. Для этого инструмента определена точность локализации областей с личными данными по сравнению с экспертной разметкой, которая составляет 99,86%.</p></sec><sec><title>Заключение</title><p>Заключение. Разработанный в рамках настоящего исследования инструмент позволяет выявлять персональные данные на цифровых медицинских изображениях с высокой точностью, что указывает на возможность его практического применения при подготовке наборов данных.</p></sec></abstract><trans-abstract xml:lang="en"><p>The aim of the study is to develop a method for detecting areas of text with private data on medical diagnostic images using the Tesseract module and the modified Levenshtein distance.</p><sec><title>Materials and methods</title><p>Materials and methods. For threshold filtering, the brightness of the points belonging to the text characters in the images is determined at the initial stage. The dynamic threshold is calculated from the histogram of the brightness of the pixels of the image. Next, the Tesseract module is used for primary text recognition. Based on the tag values from DICOM files, a set of strings was formed to search for them in the recognized text. A modified Levenshtein distance was used to search for these strings. A set of DICOM files of the “Dose Report” type was used to test the algorithm. The accuracy was assessed by experts marking up blocks of private information on images.</p></sec><sec><title>Results</title><p>Results. A tool has been developed with a set of metrics and optimal thresholds for choosing decisive rules in finding matches that allow detecting areas of text with private data on medical images. For this tool, the accuracy of localization of areas with personal data on a set of 1131 medical images was determined in comparison with expert markup, which is 99.86%.</p></sec><sec><title>Conclusion</title><p>Conclusion. The tool developed within the framework of this study allows identifying personal data on digital medical images with high accuracy, which indicates the possibility of its practical application in the preparation of data sets.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>оптическое распознавание текста</kwd><kwd>медицинские изображения</kwd><kwd>свёрточные нейронные сети</kwd><kwd>Tesseract</kwd><kwd>анонимизация данных</kwd><kwd>DICOM</kwd></kwd-group><kwd-group xml:lang="en"><kwd>optical character recognition (OCR)</kwd><kwd>medical images</kwd><kwd>convolutional neural networks</kwd><kwd>Tesseract</kwd><kwd>DICOM</kwd><kwd>data anonymization</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Публикация подготовлена при поддержке гранта Российского научного фонда № 22-25-20231, https://rscf.ru/project/22-25-20231/.</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">dicomstandard.org [Internet]. 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