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ID 117228
著者
櫻川, 加奈子 Tokushima University
Kamomae, Takeshi Nagoya University
Yokoishi, Michihiro Tokushima University
笠井, 亮佑 Tokushima University
Kajino, Akimi Tokushima University
キーワード
brain metastasis
digitally reconstructed radiograph
ExacTrac
stereotactic radiosurgery
資料タイプ
学術雑誌論文
抄録
This study aimed to investigate the effect of two different image density adjustment parameters on the results of image matching at six degrees of freedom using radiographic images generated by the ExacTrac X-ray system in brain stereotactic radiosurgery (SRS). This study comprised 32 patients who underwent brain SRS at our hospital from January 2020 to December 2020. In this study, (1) the default parameter (an image density parameter between “tissue” and “bone”) was an image density parameter for digitally reconstructed radiograph (DRR) generation used at many facilities, and (2) the bone parameter was the steepest contrast parameter used at our hospital. Of the 32 patients, 24 (75%) had a couch angle of 0.5 mm or more in the translational direction or 0.5° or more in the rotational direction, and 10 (31%) had a couch angle of 1.0 mm or more in the translational direction or 1.0° or more in the rotational direction. Among the 131 cases of all couch angles, 46 (35%) cases had a translational direction of 0.5 mm or more or a rotational direction of 0.5° or more, and 15 (11%) had a translational direction of 1.0 mm or more or a rotational direction of 1.0° or more. The results of this study indicate the usefulness of using appropriate DRR parameters for each case, rather than using the default settings. The use of appropriate DRR parameters can lead to accurate position matching results, leading to fewer image-guided radiation therapy shots and a lower imaging dose.
掲載誌名
Journal of Applied Clinical Medical Physics
ISSN
15269914
cat書誌ID
AA12034060
出版者
Wiley Periodicals|American Association of Physicists in Medicine
23
2
開始ページ
e13505
発行日
2021-12-20
権利情報
This is an open access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
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言語
eng
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出版社版
部局
医学系