검색
검색 팝업 닫기

Ex) Article Title, Author, Keywords

Article

Original Article

Korean Journal of Medical Physics 2012; 23(2): 99-105

Published online June 25, 2012

Copyright © Korean Society of Medical Physics.

Influence of Couch and Collimator on Dose Distribution of RapidArc Treatment Planning for Prostate Cancer in Radiation Therapy

치료테이블과 콜리메이터가 전립선암 래피드아크 치료계획의 선량분포에 미치는 영향

Hyung Dong Kim*, Byung Young Kim*, Sung Jin Kim*, Sang Mo Yun, Sung Kyu Kim

김형동*ㆍ김병용*ㆍ김성진*ㆍ윤상모ㆍ김성규

*Department of Physics, College of Science, Yeungnam University, Gyongsan, Department of Radiation Oncology, Daegu Fatima Hospital, Department of Therapeutic Radiology & Oncology, College of Medicine, Yeungnam University, Daegu, Korea

*영남대학교 물리학과, 대구파티마병원 방사선종양학과, 영남대학교 의과대학 방사선종양학교실

Abstract

We investigated the influence of photon energy, couch and collimator angle differences between arcs on dose distribution of RapidArc treatment planning for prostate cancer. RapidArc plans were created for 6 MV and 10 MV photons using 2 arcs coplanar and noncoplanar fields. The collimator angle differences between two arcs were 0o, 15o, 30o, 45o, 60o, 75o and 90o. The plans were optimized using same dose constrains for target and OAR (organ at risk). To evaluate the dose distribution, plans were analyzed using CI (conformity index), HI (homogeneity index), QOC (quality of coverage), etc. Photon energy, couch and collimator angle differences between arcs had a little influence on the target and OAR. The difference of dosimetric indices was less than 3.6% in the target and OAR. However, there was significant increase in the region exposed to low dose. The increase of V15% in the femur was 6.4% (left) and 5.5% (right) for the 6 MV treatment plan and 23.4% (left), 24.1% (right) for the noncoplanar plan. The increase of V10% in the Far Region distant from target was 54.2 cc for the 6 MV photon energy, 343.4 cc for the noncoplanar and 457.8 cc for the no collimator rotation between arcs.

KeywordsProstate cancer, RapidArc, Dose distribution, Radiation treatment planning

Korean Society of Medical Physics

Vol.35 No.1
March 2024

pISSN 2508-4445
eISSN 2508-4453
Formerly ISSN 1226-5829

Frequency: Quarterly

Current Issue   |   Archives

Stats or Metrics

Share this article on :

  • line