Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 275-280 |
| Number of pages | 6 |
| Journal | Japanese journal of clinical oncology |
| Volume | 38 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Apr 1 2008 |
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All Science Journal Classification (ASJC) codes
- Oncology
- Radiology Nuclear Medicine and imaging
- Cancer Research
Cite this
Variation of clinical target volume definition among japanese radiation oncologists in external beam radiotherapy for prostate cancer. / Nakamura, Katsumasa; Shioyama, Yoshiyuki; Tokumaru, Sunao; Hayashi, Nobuyuki; Oya, Natsuo; Hiraki, Yoshiyuki; Kusuhara, Kazuo; Toita, Takafumi; Suefuji, Hiroaki; Hayabuchi, Naofumi; Terashima, Hiromi; Makino, Masaoki; Jingu, Kenichi.
In: Japanese journal of clinical oncology, Vol. 38, No. 4, 01.04.2008, p. 275-280.Research output: Contribution to journal › Article
}
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
PY - 2008/4/1
Y1 - 2008/4/1
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 -