vestiftИзвестия Национальной академии наук Беларуси. Серия физико-технических наукProceedings of the National Academy of Sciences of Belarus. Physical-technical series1561-83582524-244XThe Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"10.29235/1561-8358-2022-67-3-324-331vestift-757Research ArticleДИАГНОСТИКА И БЕЗОПАСНОСТЬ ТЕХНИЧЕСКИХ И ПРИРОДНЫХ СИСТЕМDIAGNOSTICS AND SAFETY OF TECHNICAL AND ENVIRONMENT SYSTEMSМетоды оценки точности позиционирования источника излучения при проведении брахитерапииMethod for assessing the accuracy of source positioning during brachytherapyhttps://orcid.org/0000-0001-8165-7597КозловскийД. И.KazlouskiD. I.

Козловский Денис Иванович – магистр (медицинскаяфизика), сотрудник отдела по инженерному обеспечению лучевой терапии

аг. Лесной, Минский район, Минская область

Dzianis I. Kazlouski – Master’s Degree (Medical Physics)

agro-town Lesnoy, 223040, Minsk Disrtict, Minsk Region

dn2007@tut.byРеспубликанский научно-практический центр онкологии и медицинской радиологии имени Н.Н. АлександроваN.N. Alexandrov National Cancer Centre of Belarus, agro-town Lesnoy202209102022673324331Copyright © Козловский Д.И., 20222022Козловский Д.И.Kazlouski D.I.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vestift.belnauka.by/jour/article/view/757

Представлен метод оценки точности позиционирования источника с использованием нового фантома для проведения процедур контроля качества аппликаторов в брахитерапии. Приведено описание фантома для проведения измерения в рамках процедур контроля качества аппликаторов для брахитерапии, которые в виде стержня размещаются в фантоме на расстоянии 2–4 см от места расположения ионизационной камеры. Проведены измерения мощности воздушной кермы от источника и расчет расстояния от источника до ионизационной камеры. Выполнено сравнение измеренных значений расстояний со значениями, полученными при измерении по рентгеновским изображениям аппликатора с расположенным в нем источником либо рентгеноконтрастными маркерами. Зафиксированные при помощи разработанного фантома параметры хорошо согласуются с показателями, полученными при использовании установленного в процедурном помещении рентгеновского аппарата (p > 0,05). Применение предложенного фантома позволит не только определить точность установки источника излучения в позиции пребывания в канале аппликатора, но и проводить верификацию планов облучения для различных типов аппликаторов, в том числе с использованием экранирующих блоков.

A method for assessing the accuracy of source positioning using a new phantom for quality control procedures of applicators in brachytherapy is presented. A description is given of a phantom for performing measurements as part of quality control procedures for brachytherapy applicators, which are placed in the phantom in the form of a rod at a distance of 2–4 cm from the location of the ionization chamber. The air kerma strength was measured and the distance from the source to the ionization chamber was calculated. The measured values of the distances were compared with the values obtained by measuring the X-ray images of the applicator with a source located in it or radiopaque markers. The parameters recorded using the developed phantom are in good agreement with the parameters obtained using the X-ray machine installed in the procedural room (p > 0.05). The use of the proposed phantom will allow not only determination of the accuracy of the radiation source position in the applicator channel, but also verification of the irradiation plans for various types of applicators, including the use of shielding blocks.

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The authors declare that there are no conflicts of interest present.