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ID 116458
タイトル別表記
Survey of imaging dose in HDR brachytherapy
著者
Okamoto, Hiroyuki National Cancer Center
Kito, Satoshi Tokyo Metropolitan Bokutoh Hospital|Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital|Kyoto University
Tohyama, Naoki Tokyo Bay Advanced Imaging & Radiation Oncology Makuhari Clinic
Yonai, Shunsuke National Institutes for Quantum and Radiological Science and Technology
Kawamorita, Ryu Tane General Hospital
Nakamura, Masaru Aichi Medical University
Fujimoto, Takahiro Kyoto University
Tani, Syoji Osaka General Medical Center
Yomoda, Akihiro Chiyoda Technol Corporation
Isobe, Toru Elekta K.K
Furukawa, Hiroshi Japan Medical Imaging and Radiological Systems Industries Association
Kotaka, Kikuo Nuclear Safety Technology Center
Itami, Jun National Cancer Center
Dokiya, Takushi Kyoundo Hospital
Shioyama, Yoshiyuki Kyushu University
キーワード
imaging dose
brachytherapy
IGBT
displacement
fluoroscopy
資料タイプ
学術雑誌論文
抄録
Institutional imaging protocols for the verification of brachytherapy applicator placements were investigated in a survey study of domestic radiotherapy institutions. The survey form designed by a free on-line survey system was distributed via the mailing-list system of the Japanese Society for Radiation Oncology. Survey data of 75 institutions between August 2019 and October 2019 were collected. The imaging modalities used were dependent on resources available to the institutions. The displacement of a brachytherapy applicator results in significant dosimetric impact. It is essential to verify applicator placements using imaging modalities before treatment. Various imaging modalities used in institutions included a computed tomography (CT) scanner, an angiography X-ray system, a multi-purpose X-ray system and a radiotherapy simulator. The median total exposure time in overall treatment sessions was ≤75 s for gynecological and prostate cancers. Some institutions used fluoroscopy to monitor the brachytherapy source movement. Institutional countermeasures for reducing unwanted imaging dose included minimizing the image area, changing the imaging orientation, reducing the imaging frequency and optimizing the imaging conditions. It is worth noting that half of the institutions did not confirm imaging dose regularly. This study reported on the usage of imaging modalities for brachytherapy in Japan. More caution should be applied with interstitial brachytherapy with many catheters that can lead to potentially substantial increments in imaging doses for monitoring the actual brachytherapy source using fluoroscopy. It is necessary to share imaging techniques, standardize imaging protocols and quality assurance/quality control among institutions, and imaging dose guidelines for optimization of imaging doses delivered in radiotherapy should be developed.
掲載誌名
Journal of Radiation Research
ISSN
13499157
cat書誌ID
AA00705792
出版者
Oxford University Press|The Japanese Radiation Research Society|Japanese Society for Radiation Oncology
62
1
開始ページ
58
終了ページ
66
発行日
2020-10-19
権利情報
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com
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出版社版DOI
出版社版URL
フルテキストファイル
言語
eng
著者版フラグ
出版社版
部局
医学系