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j.radonc.2014.02.018.pdf | 2.74 MB | Adobe PDF | 見る/開く |
タイトル: | Intrafractional tracking accuracy in infrared marker-based hybrid dynamic tumour-tracking irradiation with a gimballed linac. |
著者: | Mukumoto, Nobutaka https://orcid.org/0000-0002-4569-3379 (unconfirmed) Nakamura, Mitsuhiro Yamada, Masahiro Takahashi, Kunio Tanabe, Hiroaki Yano, Shinsuke Miyabe, Yuki Ueki, Nami Kaneko, Shuji Matsuo, Yukinori https://orcid.org/0000-0002-4372-8259 (unconfirmed) Mizowaki, Takashi https://orcid.org/0000-0002-8135-8746 (unconfirmed) Sawada, Akira Kokubo, Masaki Hiraoka, Masahiro |
著者名の別形: | 中村, 光宏 |
キーワード: | Four-dimensional image-guided radiotherapy Dynamic tumour-tracking irradiation Respiratory motion Vero4DRT Intra-fractional tracking accuracy |
発行日: | May-2014 |
出版者: | Elsevier Ireland Ltd. |
誌名: | Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology |
巻: | 111 |
号: | 2 |
開始ページ: | 301 |
終了ページ: | 305 |
抄録: | [Purpose]To verify the intrafractional tracking accuracy in infrared (IR) marker-based hybrid dynamic tumour tracking irradiation ("IR Tracking") with the Vero4DRT. [Materials and methods]The gimballed X-ray head tracks a moving target by predicting its future position from displacements of IR markers in real-time. Ten lung cancer patients who underwent IR Tracking were enrolled. The 95th percentiles of intrafractional mechanical (iE^[95]_M), prediction (iE^[95]_P), and overall targeting errors (iE^[95]_T ) were calculated from orthogonal fluoroscopy images acquired during tracking irradiation and from the synchronously acquired log files. [Results]Averaged intrafractional errors were (left–right, cranio-caudal [CC], anterior–posterior [AP]) = (0.1 mm, 0.4 mm, 0.1 mm) for iE^[95]_M, (1.2 mm, 2.7 mm, 2.1 mm) for iE^[95]_P , and (1.3 mm, 2.4 mm, 1.4 mm) for iE^[95]_T. By correcting systematic prediction errors in the previous field, the iE^[95]_P was reduced significantly, by an average of 0.4 mm in the CC (p < 0.05) and by 0.3 mm in the AP (p < 0.01) directions. [Conclusions]Prediction errors were the primary cause of overall targeting errors, whereas mechanical errors were negligible. Furthermore, improvement of the prediction accuracy could be achieved by correcting systematic prediction errors in the previous field. |
著作権等: | © 2014 Elsevier Ireland Ltd. 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/2433/188903 |
DOI(出版社版): | 10.1016/j.radonc.2014.02.018 |
PubMed ID: | 24746563 |
出現コレクション: | 学術雑誌掲載論文等 |
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