Variation of clinical target volume definition among Japanese radiation oncologists in external beam radiotherapy for prostate cancer
| Autor: | Masaoki Makino, Sunao Tokumaru, Yoshiyuki Shioyama, Yoshiyuki Hiraki, Kenichi Jingu, Takafumi Toita, Nobuyuki Hayashi, Hiromi Terashima, Naofumi Hayabuchi, Natsuo Oya, Hiroaki Suefuji, Katsumasa Nakamura, Kazuo Kusuhara |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Male
Cancer Research medicine.medical_specialty Certification medicine.medical_treatment Planning target volume Prostate cancer Japan Prostate Specialty Boards Surveys and Questionnaires medicine Humans Radiology Nuclear Medicine and imaging External beam radiotherapy Radiation treatment planning Radiation oncologist Aged Observer Variation Contouring medicine.diagnostic_test Radiotherapy business.industry Radiotherapy Planning Computer-Assisted Prostatic Neoplasms Magnetic resonance imaging Radiotherapy Dosage General Medicine Middle Aged medicine.disease Magnetic Resonance Imaging medicine.anatomical_structure Oncology Workforce Radiology Nuclear medicine business Tomography X-Ray Computed |
| Zdroj: | Japanese journal of clinical oncology. 38(4) |
| ISSN: | 1465-3621 |
| Popis: | 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 –5 4 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. |
| Databáze: | OpenAIRE |
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