Fundamental study on quality assurance (QA) procedures for a real-time tumor tracking radiotherapy (RTRT) system from the viewpoint of imaging devices

Kimura, Suguru; Miyamoto, Naoki; Sutherland, Kenneth L.; Suzuki, Ryusuke; Shirato, Hiroki; Ishikawa, Masayori

Fundamental study on quality assurance (QA) procedures for a real-time tumor tracking radiotherapy (RTRT) system from the viewpoint of imaging devices

Kimura, Suguru; Miyamoto, Naoki; Sutherland, Kenneth L. et al.

Journal of applied clinical medical physics, 2021, 22(7), 165-176

Permalink : https://hdl.handle.net/2115/82339

このアイテムのアクセス数:482件（2026-10-18 07:18 集計）

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https://doi.org/10.1002/acm2.13307			73

論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/82339
タイトル	Fundamental study on quality assurance (QA) procedures for a real-time tumor tracking radiotherapy (RTRT) system from the viewpoint of imaging devices
著者	Kimura, Suguru ; Miyamoto, Naoki ; Sutherland, Kenneth L. ; Suzuki, Ryusuke ; Shirato, Hiroki ; Ishikawa, Masayori
著者名 Kimura, Suguru
e-Rad_Researcher 00552879 著者名 Miyamoto, Naoki
e-Rad_Researcher 30451446 著者名 Sutherland, Kenneth L.
e-Rad_Researcher 00400052 著者名 Suzuki, Ryusuke
e-Rad_Researcher 20187537 著者名 Shirato, Hiroki
e-Rad_Researcher 80314772 著者名 Ishikawa, Masayori
言語	英語
キーワード	image quality
	quality assurance
	quality assurance for imaging devices
	quality control
	real-time tumor tracking
発行日	2021-06-02
出版者	John Wiley & Sons
収録物名	Journal of applied clinical medical physics
巻(号)	22(7)
ページ	165-176
抄録	Purpose: The real-time tumor tracking radiotherapy (RTRT) system requires periodic quality assurance (QA) and quality control. The goal of this study is to propose QA procedures from the viewpoint of imaging devices in the RTRT system. Methods: Tracking by the RTRT system (equips two sets of colored image intensifiers (colored I.I.s) fluoroscopy units) for the moving gold-marker (diameter 2.0 mm) in a rotating phantom were performed under various X-ray conditions. To analyze the relationship between fluoroscopic image quality and precision of gold marker coordinate calculation, the standard deviation of the 3D coordinate (sigma 3D [mm]) of the gold marker, the mean of the pattern recognition score (PRS) and the standard deviation of the distance between rays (DBR) (sigma DBR [mm]) were evaluated. Results: When tracking with speed of 10-60 mm/s, sigma DBR increased, though the mean PRS did not change significantly (p>0.05). On the contrary, the mean PRS increased depending on the integral noise equivalent quanta (integral NEQ) that is an indicator of image quality calculated from the modulation transfer function (MTF) as an indicator of spatial resolution and the noise power spectrum (NPS) as an indicator of noise characteristic. Conclusion: The indicators of NEQ, MTF, and NPS were useful for managing the tracking accuracy of the RTRT system. We propose observing the change of these indicators as additional QA procedures for each imaging device from the commissioning baseline.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
PISSN	1526-9914
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1002/acm2.13307