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논문 기본 정보

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학술저널
저자정보
이호정 (양산부산대학교병원) 김동운 (양산부산대학교병원) 주지현 (양산부산대학교병원) 기용간 (부산대학교) 김원택 (부산대학교) 박달 (부산대학교병원) 남지호 (양산부산대학교병원) 김동현 (부산대학교) 전호상 (양산부산대학교병원)
저널정보
한국의학물리학회 의학물리 의학물리 제33권 제4호
발행연도
2022.12
수록면
101 - 107 (7page)
DOI
10.14316/pmp.2022.33.4.101

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Purpose: Radiotherapy after bladder filling protocol (BFP) is known to enhance treatment quality and reduce side effects in prostate cancer, a common male solid cancer globally. However, due to the need to hold back urine during treatment, patients frequently complain of discomfort, and treatment is frequently suspended when patients urinate during treatment and urine penetrates the treatment device, causing malfunction. Therefore, the effect of minimizing treatment time when partial-arc volumetric modulated arc therapy (VMAT) was used instead of full-arc was assessed in this study. Methods: A total of 70 plans were created in 10 patients using 7 different arc sizes, and the treatment time for each plan was calculated. Results: Reduced arc size by half resulted in a 54.4% decrease in mean treatment duration, with a proportional tendency observed. Furthermore, the effect of VMAT arc size reduction on target dose homogeneity was significantly limited, and the effect on surrounding organs at risk (OAR) was negligible. It should be noted, however, that when the arc size decreases by >40%, the dose increases in the area without OAR around the target. Conclusions: The results of this study demonstrated that partial-arc VMAT for enhancing treatment convenience and efficacy of prostate cancer patients undergoing BFP can achieve a considerable reduction in treatment time while preserving treatment quality, and it is expected to be useful for partial-arc VMAT plan design and implementation in practice..

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