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학술저널
저자정보
Lee, Eonju (Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine) Park, Won (Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine) Ahn, Sung Hwan (Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine) Cho, Jae Ho (Department of Radiation Oncology, Yonsei University College of Medicine, Severance Hospital) Kim, Jin Hee (Department of Radiation Oncology, Dongsan Medical Center, Keimyung University School of Medicine) Cho, Kwan Ho (Proton Therapy Center, National Cancer Center) Choi, Young Min (Department of Radiation Oncology, Dong-A University College of Medicine) Kim, Jae-Sung (Department of Radiation Oncology, Seoul National University Bundang Hospital, Seoul National University College of Medicine) Kim, Jin Ho (Department of Radiation Oncology, Seoul National University College of Medicine) Jang, Hong-Seok (Department of Radiation Oncology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) Kim, Young-Seok (Department of Radiation Oncology, Asan Medical Cent) Nam, Taek-Keun
저널정보
대한방사선종양학회 Radiation oncology journal : ROJ Radiation oncology journal : ROJ 제36권 제1호
발행연도
2018.1
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11 - 16 (6page)

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Purpose: To investigate interobserver variation in target volume delineations for prostate cancer salvage radiotherapy using planning computed tomography (CT) versus combined planning CT and magnetic resonance imaging (MRI). Materials and Methods: Ten radiation oncologists independently delineated a target volume on the planning CT scans of five cases with different pathological status after radical prostatectomy. Two weeks later, this was repeated with the addition of planning MRI. The volumes obtained with CT only and combined CT and MRI were compared, and the effect of the addition of planning MRI on interobserver variability was assessed. Results: There were large differences in clinical target volume (CTV) delineated by each observer, regardless of the addition of planning MRI ($9.44-139.27cm^3$ in CT only and $7.77-122.83cm^3$ in CT plus MRI) and no significant differences in the mean and standard deviation of CTV. However, there were decreases in mean volume and standard deviation as a result of using the planning MRI. Conclusion: This study showed substantial interobserver variation in target volume delineation for salvage radiotherapy. The combination of planning MRI with CT tended to decrease the target volume and the variation.

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