지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국의학물리학회 의학물리 의학물리 제28권 제4호
- 발행연도
- 2017.12
- 수록면
- 181 - 189 (9page)
- DOI
- https://doi.org/10.14316/pmp.2017.28.4.181
이용수
초록· 키워드
오류제보하기
The conventional delivery quality assurance (DQA) process for RapidArc (Varian Medical Systems, Palo Alto, USA), has the limitation that it measures and analyzes the dose in a phantom material and cannot analyze the dosimetric changes under the motional organ condition. In this study, a DQA method was designed to overcome the limitations of the conventional DQA process for internal target volume (ITV) based RapidArc. The dynamic DQA measurement device was designed with a moving phantom that can simulate variable target motions. The dose distribution in the real volume of the target and organ-at-risk (OAR)s were reconstructed using 3DVH with the ArcCHECK (SunNuclear, Melbourne, USA) measurement data under the dynamic condition. A total of 10 ITV-based RapidArc plans for liver-cancer patients were analyzed with the designed dynamic DQA process. The average pass rate of gamma evaluation was 81.55±9.48% when the DQA dose was measured in the respiratory moving condition of the patient. Appropriate method was applied to correct the effect of moving phantom structures in the dose calculation, and DVH data of the real volume of target and OARs were created with the recalculated dose by the 3DVH program. We confirmed the valid dose coverage of a real target volume in the ITV-based RapidArc. The variable difference of the DVH of the OARs showed that dose variation can occur differently according to the location, shape, size and motion range of the target. The DQA process devised in this study can effectively evaluate the DVH of the real volume of the target and OARs in a respiratory moving condition in addition to the simple verification of the accuracy of the treatment machine. This can be helpful to predict the prognosis of treatment by the accurate dose analysis in the real target and OARs.
목차
등록된 정보가 없습니다.
참고문헌 (17)
참고문헌 신청
Ezzell GA / 2003 / Guidance document on delivery, treatment planning, and clinical implementation of IMRT : Report of the IMRT subcommittee of the AAPM radiation therapy committee / Med Phys 30:2089~2115
Palta JR / 2008 / Quality assurance of Intensitymodulated radiation therapy / Int J Radiat Oncol Biol Phys 71(1 Suppl):S108~S112
Li JS / 2010 / Uncertainties in IMRT dosimetry / Med Phys 37:2491~2500
Gordon JD / 2011 / Confidence limit variation for a single IMRT system following the TG119 protocol / Med Phys 38:1641~1648
Ezzell GA / 2009 / IMRT commissioning : Multiple institution planning and dosimetry comparisons, a report from AAPM Task Group 119 / Med Phys 36:5359~5373
Palta JR / 2008 / Quality assurance of Intensitymodulated radiation therapy / Int J Radiat Oncol Biol Phys 71(1 Suppl):S108~S112
Li JS / 2010 / Uncertainties in IMRT dosimetry / Med Phys 37:2491~2500
Gordon JD / 2011 / Confidence limit variation for a single IMRT system following the TG119 protocol / Med Phys 38:1641~1648
Ezzell GA / 2009 / IMRT commissioning : Multiple institution planning and dosimetry comparisons, a report from AAPM Task Group 119 / Med Phys 36:5359~5373
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