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Hokkaido University Collection of Scholarly and Academic Papers >
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A motion-compensated image filter for low-dose fluoroscopy in a real-time tumor-tracking radiotherapy system
This item is licensed under:Creative Commons Attribution-NonCommercial 4.0 International
| Title: | A motion-compensated image filter for low-dose fluoroscopy in a real-time tumor-tracking radiotherapy system |
| Authors: | Miyamoto, Naoki Browse this author →KAKEN DB | | Ishikawa, Masayori Browse this author →KAKEN DB | | Sutherland, Kenneth Browse this author →KAKEN DB | | Suzuki, Ryusuke Browse this author →KAKEN DB | | Matsuura, Taeko Browse this author →KAKEN DB | | Toramatsu, Chie Browse this author | | Takao, Seishin Browse this author →KAKEN DB | | Nihongi, Hideaki Browse this author | | Shimizu, Shinichi Browse this author →KAKEN DB | | Umegaki, Kikuo Browse this author →KAKEN DB | | Shirato, Hiroki Browse this author →KAKEN DB |
| Keywords: | respiratory-gated radiotherapy | | real-time tracking | | respiratory motion | | image processing | | motion compensation | | imaging dose |
| Issue Date: | Jan-2015 |
| Publisher: | Oxford University Press |
| Journal Title: | Journal Of Radiation Research |
| Volume: | 56 |
| Issue: | 1 |
| Start Page: | 186 |
| End Page: | 196 |
| Publisher DOI: | 10.1093/jrr/rru069 |
| PMID: | 25129556 |
| Abstract: | In the real-time tumor-tracking radiotherapy system, a surrogate fiducial marker inserted in or near the tumor is detected by fluoroscopy to realize respiratory-gated radiotherapy. The imaging dose caused by fluoroscopy should be minimized. In this work, an image processing technique is proposed for tracing a moving marker in low-dose imaging. The proposed tracking technique is a combination of a motion-compensated recursive filter and template pattern matching. The proposed image filter can reduce motion artifacts resulting from the recursive process based on the determination of the region of interest for the next frame according to the current marker position in the fluoroscopic images. The effectiveness of the proposed technique and the expected clinical benefit were examined by phantom experimental studies with actual tumor trajectories generated from clinical patient data. It was demonstrated that the marker motion could be traced in low-dose imaging by applying the proposed algorithm with acceptable registration error and high pattern recognition score in all trajectories, although some trajectories were not able to be tracked with the conventional spatial filters or without image filters. The positional accuracy is expected to be kept within +/- 2 mm. The total computation time required to determine the marker position is a few milliseconds. The proposed image processing technique is applicable for imaging dose reduction. |
| Rights: | http://creativecommons.org/licenses/by-nc/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/58563 |
| Appears in Collections: | 国際連携研究教育局 : GI-CoRE (Global Institution for Collaborative Research and Education : GI-CoRE) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
保健科学院・保健科学研究院 (Graduate School of Health Sciences / Faculty of Health Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 石川 正純
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