Variation of clinical target volume definition among Japanese radiation oncologists in external beam radiotherapy for prostate cancer
Variation of clinical target volume definition among Japanese radiation oncologists in external beam radiotherapy for prostate cancer
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DOI：
10.1093/jjco/hyn014
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发表时间：
2008-04-01
影响因子：
2.4
通讯作者：
Jingu, Kenichi
中科院分区：
文献类型：
--
作者：
Nakamura, Katsumasa;Shioyama, Yoshiyuki;Jingu, Kenichi
背景资料：我们调查了观察者之间的变化，在前列腺的目标体积和使用诊断计算机断层扫描（CT）或磁共振（MR）图像的治疗planning.Methods的趋势：二十五个放射肿瘤学家被要求绘制的外部轮廓的前列腺CT图像（0.3厘米的间距）的患者与局部前列腺癌。他们还回答了关于使用诊断CT或MR图像的contouring.Results的调查问卷：25名医生，28%很少或从来没有提到诊断CT图像。相反，医生倾向于更频繁地参考MR图像。大约50%的医生相信对比增强图像对前列腺勾画的有用性。至于前列腺轮廓的变化，前列腺头尾长度的中位数为36 mm（范围，21-54 mm），前列腺体积的中位数为43.5 cm（3）（范围，23.8-98.3 cm（3））。观察者间的变化是不显着的持续时间作为一个放射肿瘤学家，董事会认证状态作为放射肿瘤学家，和前列腺癌的治疗计划的数量在过去的1 year.Conclusion：各种各样的定义，前列腺被发现在日本放射肿瘤学家。
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.