2008年4月
Variation of clinical target volume definition among Japanese radiation oncologists in external beam radiotherapy for prostate cancer
JAPANESE JOURNAL OF CLINICAL ONCOLOGY
- 巻
- 38
- 号
- 4
- 開始ページ
- 275
- 終了ページ
- 280
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1093/jjco/hyn014
- 出版者・発行元
- OXFORD UNIV PRESS
Background: We investigated the interobserver variation in the prostate target volume and the trend toward the use of diagnostic computed tomography (CT) or magnetic resonance (MR) images for treatment planning.
Methods: Twenty-five radiation oncologists were asked to draw the external contour of the prostate on CT images (0.3 cm spacing) of a patient with localized prostate cancer. They also answered a questionnaire regarding the use of diagnostic CT or MR images for the contouring.
Results: Of the 25 physicians, 28% rarely or never referred to the diagnostic CT images. In contrast, the physicians tended to refer to the MR images more frequently. Approximately 50% of the physicians believed in the usefulness of contrast-enhanced images for the delineation of the prostate. As for the variation of the prostate contouring, the median craniocaudal prostate length was 36 mm (range, 21-54 mm), and the median prostate volume was 43.5 cm(3) (range, 23.8-98.3 cm(3)). The interobserver variability was not significant in the duration as a radiation oncologist, the board certification status as radiation oncologists, and the number of treatment plans developed for prostate cancer during the last 1 year.
Conclusion: A wide variety of the definitions of the prostate was found among Japanese radiation oncologists.
Methods: Twenty-five radiation oncologists were asked to draw the external contour of the prostate on CT images (0.3 cm spacing) of a patient with localized prostate cancer. They also answered a questionnaire regarding the use of diagnostic CT or MR images for the contouring.
Results: Of the 25 physicians, 28% rarely or never referred to the diagnostic CT images. In contrast, the physicians tended to refer to the MR images more frequently. Approximately 50% of the physicians believed in the usefulness of contrast-enhanced images for the delineation of the prostate. As for the variation of the prostate contouring, the median craniocaudal prostate length was 36 mm (range, 21-54 mm), and the median prostate volume was 43.5 cm(3) (range, 23.8-98.3 cm(3)). The interobserver variability was not significant in the duration as a radiation oncologist, the board certification status as radiation oncologists, and the number of treatment plans developed for prostate cancer during the last 1 year.
Conclusion: A wide variety of the definitions of the prostate was found among Japanese radiation oncologists.
- リンク情報
- ID情報
-
- DOI : 10.1093/jjco/hyn014
- ISSN : 0368-2811
- Web of Science ID : WOS:000255439200006