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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국의학물리학회 의학물리 의학물리 제32권 제4호
- 발행연도
- 2021.12
- 수록면
- 122 - 129 (8page)
- DOI
- 10.14316/pmp.2021.32.4.122
이용수
초록· 키워드
오류제보하기
Purpose: This study aimed to design a multipurpose dose verification phantom for external audits to secure safe and optimal radiation therapy.
Methods: In this study, we used International Atomic Energy Agency (IAEA) LiF powder thermoluminescence dosimeter (TLD), which is generally used in the therapeutic radiation dose assurance project. The newly designed multipurpose phantom (MPP) consists of a container filled with water, a TLD holder, and two water-pressing covers. The size of the phantom was designed to be sufficient (30×30×30 cm3). The water container was filled with water and pressed with the cover for normal incidence to be fixed. The surface of the MPP was devised to maintain the same distance from the source at all times, even in the case of oblique incidence regardless of the water level. The MPP was irradiated with 6, 10, and 15 MV photon beams from Varian Linear Accelerator and measured by a 1.25 cm3 ionization chamber to get the correction factors. Monte Carlo (MC) simulation was also used to compare the measurements.
Results: The result obtained by MC had a relatively high uncertainty of 1% at the dosimetry point, but it showed a correction factor value of 1.3% at the 5 cm point. The energy dependence was large at 6 MV and small at 15 MV. Various dosimetric parameters for external audits can be performed within an hour.
Conclusions: The results allow an objective comparison of the quality assurance (QA) of individual hospitals. Therefore, this can be employed for external audits or QA systems in radiation therapy institutions.
목차
등록된 정보가 없습니다.
참고문헌 (18)
참고문헌 신청
Hoornaert MT / 1993 / A dosimetric quality audit of photon beams by the Belgian Hospital Physicist Association / Radiother Oncol 28:37~43
Nisbet A / 1998 / A dosimetric intercomparison of kilovoltage X-rays, megavoltage photons and electrons in the Republic of Ireland / Radiother Oncol 48:95~101
Nisbet A / 1997 / A dosimetric intercomparison of electron beams in UK radiotherapy centres / Phys Med Biol 42:2393~2409
최창헌 / 2010 / External Auditing on Absorbed Dose Using a Solid Water Phantom for Domestic Radiotherapy Facilities / Radiation oncology journal 28(1):50~56
Davis B / 1993 / Quality audit of megavoltage radiotherapy units : intercomparison of dose at a reference point using a mailed TL-dosimetry system / Radiother Oncol 28:79~81
Nisbet A / 1998 / A dosimetric intercomparison of kilovoltage X-rays, megavoltage photons and electrons in the Republic of Ireland / Radiother Oncol 48:95~101
Nisbet A / 1997 / A dosimetric intercomparison of electron beams in UK radiotherapy centres / Phys Med Biol 42:2393~2409
최창헌 / 2010 / External Auditing on Absorbed Dose Using a Solid Water Phantom for Domestic Radiotherapy Facilities / Radiation oncology journal 28(1):50~56
Davis B / 1993 / Quality audit of megavoltage radiotherapy units : intercomparison of dose at a reference point using a mailed TL-dosimetry system / Radiother Oncol 28:79~81
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