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acm2.12692.pdf | 1.29 MB | Adobe PDF | 見る/開く |
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dc.contributor.author | Miyamae, Yuta | en |
dc.contributor.author | Akimoto, Mami | en |
dc.contributor.author | Sasaki, Makoto | en |
dc.contributor.author | Fujimoto, Takahiro | en |
dc.contributor.author | Yano, Shinsuke | en |
dc.contributor.author | Nakamura, Mitsuhiro | en |
dc.contributor.alternative | 藤本, 隆広 | ja |
dc.contributor.alternative | 矢野, 慎輔 | ja |
dc.contributor.alternative | 中村, 光宏 | ja |
dc.date.accessioned | 2020-02-17T00:31:48Z | - |
dc.date.available | 2020-02-17T00:31:48Z | - |
dc.date.issued | 2020-01 | - |
dc.identifier.issn | 1526-9914 | - |
dc.identifier.uri | http://hdl.handle.net/2433/245676 | - |
dc.description.abstract | This study investigated the effects of respiratory motion, including unwanted breath holding, on the target volume and centroid position on four‐dimensional computed tomography (4DCT) imaging. Cine 4DCT images were reconstructed based on a time‐based sorting algorithm, and helical 4DCT images were reconstructed based on both the time‐based sorting algorithm and an amplitude‐based sorting algorithm. A spherical object 20 mm in diameter was moved according to several simulated respiratory motions, with a motion period of 4.0 s and maximum amplitude of 5 mm. The object was extracted automatically, and the target volume and centroid position in the craniocaudal direction were measured using a treatment planning system. When the respiratory motion included unwanted breath‐holding times shorter than the breathing cycle, the root mean square errors (RSME) between the reference and imaged target volumes were 18.8%, 14.0%, and 5.5% in time‐based images in cine mode, time‐based images in helical mode, and amplitude‐based images in helical mode, respectively. In helical mode, the RSME between the reference and imaged centroid position was reduced from 1.42 to 0.50 mm by changing the reconstruction method from time‐ to amplitude‐based sorting. When the respiratory motion included unwanted breath‐holding times equal to the breathing cycle, the RSME between the reference and imaged target volumes were 19.1%, 24.3%, and 15.6% in time‐based images in cine mode, time‐based images in helical mode, and amplitude‐based images in helical mode, respectively. In helical mode, the RSME between the reference and imaged centroid position was reduced from 1.61 to 0.83 mm by changing the reconstruction method from time‐ to amplitude‐based sorting. With respiratory motion including breath holding of shorter duration than the breathing cycle, the accuracies of the target volume and centroid position were improved by amplitude‐based sorting, particularly in helical 4DCT. | en |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | John Wiley and Sons Ltd | en |
dc.rights | © 2019 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, Inc. on behalf of American Association of Physicists in Medicine. | en |
dc.rights | This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. | en |
dc.subject | 4DCT | en |
dc.subject | breath‐holding time | en |
dc.subject | scan mode | en |
dc.subject | sorting algorithm | en |
dc.title | Variation in target volume and centroid position due to breath holding during four-dimensional computed tomography scanning: A phantom study | en |
dc.type | journal article | - |
dc.type.niitype | Journal Article | - |
dc.identifier.jtitle | Journal of Applied Clinical Medical Physics | en |
dc.identifier.volume | 21 | - |
dc.identifier.issue | 1 | - |
dc.identifier.spage | 11 | - |
dc.identifier.epage | 17 | - |
dc.relation.doi | 10.1002/acm2.12692 | - |
dc.textversion | publisher | - |
dc.address | Division of Clinical Radiology Service, Kyoto University Hospital・Department of Radiological Technology, Radiological Diagnosis, National Cancer Center Hospital, Tokyo | en |
dc.address | Department of Radiation Oncology, Kurashiki Central Hospital | en |
dc.address | Division of Clinical Radiology Service, Kyoto University Hospital | en |
dc.address | Division of Clinical Radiology Service, Kyoto University Hospital | en |
dc.address | Division of Clinical Radiology Service, Kyoto University Hospital | en |
dc.address | Division of Medical Physics, Department of Information Technology and Medical Engineering, Human Health Sciences, Graduate School of Medicine | en |
dc.identifier.pmid | 31385421 | - |
dcterms.accessRights | open access | - |
datacite.awardNumber | 18H02766 | - |
jpcoar.funderName | 日本学術振興会 | ja |
jpcoar.funderName.alternative | Japan Society for the Promotion of Science (JSPS) | en |
出現コレクション: | 学術雑誌掲載論文等 |
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