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 제26권 제2호
- 발행연도
- 2015.6
- 수록면
- 87 - 92 (6page)
- DOI
- http://dx.doi.org/10.14316/pmp.2015.26.2.87
이용수
초록· 키워드
오류제보하기
The gated RapidArc may produce a dosimetric error due to the stop-and-go motion of heavy gantry which can misalign the gantry restart position and reduce the accuracy of important factors in RapidArc delivery such as MLC movement and gantry speed. In this study, the effect of stop-and-go motion in gated RapidArc was analyzed with varying gating window time, which determines the total number of stop-and-go motions. Total 10 RapidArc plans for treatment of liver cancer were prepared. The RPM gating system and the moving phantom were used to set up the accurate gating window time. Two different delivery quality assurance (DQA) plans were created for each RapidArc plan. One is the portal dosimetry plan and the other is MapCHECK2 plan. The respiratory cycle was set to 4 sec and DQA plans were delivered with three different gating conditions: no gating, 1-sec gating window, and 2-sec gating window. The error between calculated dose and measured dose was evaluated based on the pass rate calculated using the gamma evaluation method with 3%/3 mm criteria. The average pass rates in the portal dosimetry plans were 98.72±0.82%, 94.91±1.64%, and 98.23±0.97% for no gating, 1-sec gating, and 2-sec gating, respectively. The average pass rates in MapCHECK2 plans were 97.80±0.91%, 95.38±1.31%, and 97.50±0.96% for no gating, 1-sec gating, and 2-sec gating, respectively. We verified that the dosimetric accuracy of gated RapidArc increases as gating window time increases and efforts should be made to increase gating window time during the RapidArc treatment process.
목차
등록된 정보가 없습니다.
참고문헌 (13)
참고문헌 신청
Ahmed RS / 2007 / Intensity modulated with respiratory gating for radiotherapy of the pleural space / Med Dosim 32(1):16~22
van der Geld YG / 2008 / Evaluation of four-dimensional computed tomography-based intensity-modulated and respiratory-gated radiotherapy techniques for pancreatic carcinoma / Int J Radiat Oncol Biol Phys 72(4):1215~1220
Chen H / 2009 / Dosimetric evaluations of the interplay effect in respiratory-gated intensity-modulated radiation therapy / Med Phys 36(3):893~903
Cheong KH / 2010 / Evaluation of delivered monitor unit accuracy of gated step-and-shoot IMRT using a two-dimensional detector array / Med Phys 37(3):1146~1151
Ling CC / 2008 / Commissioning and quality assurance of RapidArc radiotherapy delivery system / Int J Radiat Oncol Biol Phys 72(2):575~581
van der Geld YG / 2008 / Evaluation of four-dimensional computed tomography-based intensity-modulated and respiratory-gated radiotherapy techniques for pancreatic carcinoma / Int J Radiat Oncol Biol Phys 72(4):1215~1220
Chen H / 2009 / Dosimetric evaluations of the interplay effect in respiratory-gated intensity-modulated radiation therapy / Med Phys 36(3):893~903
Cheong KH / 2010 / Evaluation of delivered monitor unit accuracy of gated step-and-shoot IMRT using a two-dimensional detector array / Med Phys 37(3):1146~1151
Ling CC / 2008 / Commissioning and quality assurance of RapidArc radiotherapy delivery system / Int J Radiat Oncol Biol Phys 72(2):575~581
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