TY - JOUR
T1 - Variation of clinical target volume definition among japanese radiation oncologists in external beam radiotherapy for prostate cancer
AU - Nakamura, Katsumasa
AU - Shioyama, Yoshiyuki
AU - Tokumaru, Sunao
AU - Hayashi, Nobuyuki
AU - Oya, Natsuo
AU - Hiraki, Yoshiyuki
AU - Kusuhara, Kazuo
AU - Toita, Takafumi
AU - Suefuji, Hiroaki
AU - Hayabuchi, Naofumi
AU - Terashima, Hiromi
AU - Makino, Masaoki
AU - Jingu, Kenichi
N1 - Funding Information:
This study was supported in part by the Grants-in-Aid for Scientific Research from Japan Society for the Promotion of Sciences (No. 18209040 and 18591383).
PY - 2008/4
Y1 - 2008/4
N2 - 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 cm3 (range, 23.8-98.3 cm3). 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.
AB - 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 cm3 (range, 23.8-98.3 cm3). 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.
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U2 - 10.1093/jjco/hyn014
DO - 10.1093/jjco/hyn014
M3 - Article
C2 - 18337319
AN - SCOPUS:42549122735
VL - 38
SP - 275
EP - 280
JO - Japanese Journal of Clinical Oncology
JF - Japanese Journal of Clinical Oncology
SN - 0368-2811
IS - 4
ER -
