Publication:
Monte-Carlo calculation of output correction factors for ionization chambers, solid-state detectors, and EBT3 film in small fields of high-energy photons

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J Applied Clin Med Phys - 2022 - Klimanov - Monte‐Carlo calculation of output correction factors for ionization chambers .pdf(600.57 KB)
Дата
2023
Авторы
Klimanov, V. A.
Kirpichev, Y. S.
Serikbekova, Z. K.
Belousov, A. V.
Krusanov, G. A.
Walwyn-Salas, G.
Morozov, V. N.
Kolyvanova, M. A.
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Научные группы
Организационные подразделения
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Организационная единица
Инженерно-физический институт биомедицины
Цель ИФИБ и стратегия развития – это подготовка высококвалифицированных кадров на базе передовых исследований и разработок новых перспективных методов и материалов в области инженерно-физической биомедицины. Занятие лидерских позиций в биомедицинских технологиях XXI века и внедрение их в образовательный процесс, что отвечает решению практикоориентированной задачи мирового уровня – диагностике и терапии на клеточном уровне социально-значимых заболеваний человека.
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Аннотация
High-energy accelerators are often used in oncological practice, but the information on the small-field dosimetry for the photon beams with nominal energy above 10 MV is limited. The goal of the present work was to determine the values of the output correction factor ((Formula presented.)) for solid-state detectors (Diode E, PTW 60017; microDiamond, PTW 60019), EBT3 film, and ionization chambers (Semiflex, PTW 31010; Semiflex 3D, PTW 31021; PinPoint, PTW 31015; PinPoint 3D, PTW 31016) in the small fields formed by 10, 15, 18, and 20 MV photon beams. The output correction factors were calculated by Monte-Carlo method using EGSnrc toolkit for six field sizes (from (Formula presented.) to (Formula presented.)) for isocentric and constant source-to-surface distance (SSD) techniques. The decrease in the field size led to an increase in (Formula presented.) for ionization chambers, while for solid-state detectors and radiochromic film, (Formula presented.) were less than unity at the smallest field size. A larger sensitive volume of ionization chamber corresponded to a stronger deviation of output correction factor from unity: 1.847 (125 mm3 PTW 31010) versus up to 1.183 (16 mm3 PTW 31016) at the smallest field of 10 MV beam. The calculated output correction factors were used to correct the output factors for PTW 60017, PTW 60019, and EBT3. The deviation of the corrected output factor from the results of Monte-Carlo simulation did not exceed 3% in the fields from (Formula presented.) to (Formula presented.) for 10 and 18 MV beams. Thus, Diode E, microDiamond, and EBT3 film can be recommended for small-field dosimetry of high-energy photons. © 2022 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, LLC on behalf of The American Association of Physicists in Medicine.
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Monte-Carlo calculation of output correction factors for ionization chambers, solid-state detectors, and EBT3 film in small fields of high-energy photons / Klimanov, V.A. [et al.] // Journal of Applied Clinical Medical Physics. - 2023. - 10.1002/acm2.13753
URI
https://www.doi.org/10.1002/acm2.13753
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85136904080&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000843469600001
 https://openrepository.mephi.ru/handle/123456789/29848
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