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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국의학물리학회 의학물리 의학물리 제29권 제4호
- 발행연도
- 2018.12
- 수록면
- 137 - 142 (6page)
- DOI
- https://doi.org/10.14316/pmp.2018.29.4.137
이용수
초록· 키워드
오류제보하기
This study aimed to evaluate and verify a process for correcting the extended source-to-imager distance (SID) in portal dosimetry (PD). In this study, eight treatment plans (four volumetric modulated arc therapy and four intensity-modulated radiation therapy plans) at different treatment sites and beam energies were selected for measurement. A Varian PD system with portal dose image prediction (PDIP) was used for the measurement and verification. To verify the integrity of the plan, independent measurements were performed with the MapCHECK device. The predicted and measured fluence were evaluated using the gamma passing rate. The output ratio was defined as the ratio of the absolute dose of the reference SID (100 cm) to that of each SID (120 cm or 140 cm). The measured fluence for each SID was absolutely and relatively compared. The average SID output ratios were 0.687 and 0.518 for 120 SID and 140 SID, respectively; the ratio showed less than 1% agreement with the calculation obtained by using the inverse square law. The resolution of the acquired EPIDs were 0.336, 0.280, and 0.240 for 100, 120, and 140 SID, respectively. The gamma passing rates with PD and MapCHECK exceeded 98% for all treatment plans and SIDs. When autoalignment was performed in PD, the X-offset showed no change, and the Y-offset decreased with increasing SID. The PD-generated PDIP can be used for extended SID without additional correction.
목차
등록된 정보가 없습니다.
참고문헌 (21)
참고문헌 신청
Wolff D / 2009 / Volumetric modulated arc therapy (VMAT) vs. serial tomotherapy, step-andshoot IMRT and 3D-conformal RT for treatment of prostate cancer / Radiotherapy and Oncology 93(2):226~233
Park JM / 2018 / Reliability of the gamma index analysis as a verification method of volumetric modulated arc therapy plans / Radiation Oncology 13(1):175
Davidson MT / 2011 / Assessing the role of volumetric modulated arc therapy(VMAT)relative to IMRT and helical tomotherapy in the management of localized, locally advanced, and post-operative prostate cancer / International Journal of Radiation Oncology*Biology*Physics 80(5):1550~1558
Park J / 2015 / The effect of MLC speed and acceleration on the plan delivery accuracy of VMAT / The British journal of radiology 88(1049):20140698
Jornet N / 2014 / Multicentre validation of IMRT pre-treatment verification : comparison of in-house and external audit / Radiotherapy and Oncology 112(3):381~388
Park JM / 2018 / Reliability of the gamma index analysis as a verification method of volumetric modulated arc therapy plans / Radiation Oncology 13(1):175
Davidson MT / 2011 / Assessing the role of volumetric modulated arc therapy(VMAT)relative to IMRT and helical tomotherapy in the management of localized, locally advanced, and post-operative prostate cancer / International Journal of Radiation Oncology*Biology*Physics 80(5):1550~1558
Park J / 2015 / The effect of MLC speed and acceleration on the plan delivery accuracy of VMAT / The British journal of radiology 88(1049):20140698
Jornet N / 2014 / Multicentre validation of IMRT pre-treatment verification : comparison of in-house and external audit / Radiotherapy and Oncology 112(3):381~388
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