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タイトル: | Impact of double-balloon rectal catheter use in external-beam radiotherapy for prostate cancer. |
著者: | Takayama, Kenji Mizowaki, Takashi https://orcid.org/0000-0002-8135-8746 (unconfirmed) Negoro, Yoshiharu Norihisa, Yoshiki Hiraoka, Masahiro |
著者名の別形: | 溝脇, 尚志 |
キーワード: | Prostate cancer External-beam radiotherapy Rectal balloon Organ motion Rectal sparing |
発行日: | Feb-2011 |
出版者: | Springer Verlag |
誌名: | International journal of clinical oncology / Japan Society of Clinical Oncology |
巻: | 16 |
号: | 1 |
開始ページ: | 50 |
終了ページ: | 56 |
抄録: | [Backgrounds]Prostate motion and rectal sparing are important treatment strategy issues in external-beam radiotherapy for localized prostate cancer. To address these issues, we prospectively investigated the feasibility of using a double-balloon rectal catheter. [Methods]The rectal catheter has inner and outer balloons that wedge the anus between them. Computed tomography (CT) examinations with and without the catheter were conducted in seven patients with localized prostate cancer treated by external-beam radiotherapy. The rectal wall sparing effect was evaluated using virtual three-dimensional conformal radiotherapy plans in each arm. To evaluate interfractional prostate motion, each patient underwent a series of four CT examinations consisting of a planning CT followed by three additional series of CT with and without a catheter during the course of radiotherapy. [Results]Virtual plans demonstrated the reduction of the dose to the rectum by expanding the posterior wall to lie outside the high- to intermediate-dose area when a catheter was applied. Interfractional prostate motion in the anteroposterior direction was effectively reduced by catheter usage; the mean ± standard deviation (SD) of the displacement was 1.3 ± 0.9 mm with a catheter as compared to 2.8 ± 1.8 mm without a catheter (P = 0.014), and the maximum displacement was successfully suppressed to 3 mm with a catheter compared to 6 mm without a catheter. Systematic and random components were also reduced with the catheter. [Conclusion]These results suggest the feasibility and clinical applicability of the double-balloon rectal catheter. |
著作権等: | The final publication is available at www.springerlink.com This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/158361 |
DOI(出版社版): | 10.1007/s10147-010-0129-7 |
PubMed ID: | 20922449 |
出現コレクション: | 学術雑誌掲載論文等 |
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