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Original Article

Korean Journal of Medical Physics 2010; 21(2): 183-191

Published online June 25, 2010

Copyright © Korean Society of Medical Physics.

First Clinical Experience about RapidArc Treatment with Prostate Cancer in Ajou University Hospital

아주대학교병원에서의 전립선암에 대한 래피드아크 치료

Hae-Jin Park*†‡, Mi-Hwa Kim*, Mison Chun*, Young-Teak Oh*, Tae-Suk Suh†‡

박혜진*†‡ㆍ김미화*ㆍ전미선*ㆍ오영택*ㆍ서태석†‡

*Department of Radiation Oncology, Ajou University Hospital, Suwon, Department of Biomedical Engineering, Research Institute of Biomedical Engineering, College of Medicine, The Catholic University of Korea, Seoul, Korea

*아주대학교병원 방사선종양학과, 가톨릭대학교 의과대학 의공학교실, 가톨릭대학교 의과대학 생체의공학연구소

Abstract

In this study, the patient with localized prostate cancer who had previously been treated at Ajou University Hospital was randomly selected since March, 2009. we performed IMRT and 2RA plans and the same dose objectives were used for CTVs, PTVs, rectum, bladder, and femoral head of the respective plans. Arc optimizations and dose calculations were performed using Eclipse versions 8.6. In this paper, we evaluated the performance of IMRT and RA plans to investigate the clinical effect of RA for prostate cancer case. In our comparison of treatment techniques, RA was found to be superior to IMRT being better dose conformity of target volume. As for the rectum and bladder, RA was better than IMRT at decreasing the volume irradiated. RA has the ability to avoid critical organs selectively through applied same dose constraints while maximally treating the target dose. Therefore, this result suggests that there should be less rectal toxicity with RA compared with IMRT, with no compromise in tumor margin. These findings, which show more favorable rectal, bladder, and femoral head DVHs with RA, imply that should not result in excess risk of toxicity when this technique is used. Many experiences with RA have shown not only dosimetric advantage, but also improved clinical toxicity when comparing with IMRT. The main drawbacks of RA are the more complex and time-consuming treatment planning process and the need for more exact physics quality assurance (QA).

KeywordsRapidArc, IMRT, Prostate cancer, Double arcs planning, Quality assurance

Korean Society of Medical Physics

Vol.35 No.2
June 2024

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

Frequency: Quarterly

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