{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T08:40:42Z","timestamp":1792658442334,"version":"4.5.0"},"reference-count":14,"publisher":"Oxford University Press (OUP)","issue":"1187","license":[{"start":{"date-parts":[[2026,8,21]],"date-time":"2026-08-21T00:00:00Z","timestamp":1787270400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,11,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Objectives<\/jats:title>\n                    <jats:p>To compare 4 commercial cone-beam CT (CBCT) geometric quality assurance phantoms within a common workflow, focusing on positioning\/repositioning accuracy and agreement between the laser-defined setup reference and the CBCT imaging isocenter.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>MIMI, QUASAR Penta-Guide, ISOCube, and MZ CUBE were evaluated monthly for 5 months on a Versa HD system with XVI CBCT and a HexaPOD couch. Two observers independently completed each measurement. Three-dimensional post-correction translational residuals (\u0394dpos\/rep) and laser-defined setup reference-CBCT imaging isocenter distances (\u0394diso) were calculated. Phantom comparisons used observer-averaged values from the 5 monthly sessions. Rotational correction and CBCT image quality were assessed descriptively with MZ CUBE.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Mean \u0394dpos\/rep values ranged from 0.19 to 0.31\u2009mm, with mean absolute observer differences of 0.05-0.12\u2009mm. No overall difference was found among the 4 phantoms (P\u2009=\u2009.547). Mean \u0394diso values ranged from 0.68 to 0.87\u2009mm, and all measurements were below 2\u2009mm. An overall difference was observed for \u0394diso (P\u2009=\u2009.019), although no pairwise comparisons were performed. With MZ CUBE, mean post-correction translational and rotational residuals were 0.24\u2009mm and 0.37\u00b0, respectively, and image-quality measures showed no consistent temporal trend.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>The 4 phantoms showed similarly small post-correction translational residuals. In our setting, MZ CUBE additionally supported rotational and image-quality checks.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Advances in knowledge<\/jats:title>\n                    <jats:p>Direct comparison within a common workflow showed similar translational performance, while the scope of additional testing depended on the phantom configuration and locally available accessories.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1093\/bjr\/tqag197","type":"journal-article","created":{"date-parts":[[2026,8,21]],"date-time":"2026-08-21T14:48:17Z","timestamp":1787323697000},"page":"2261-2265","source":"Crossref","is-referenced-by-count":0,"title":["Comparison of 4 CBCT-IGRT geometric QA phantoms within a single institutional workflow"],"prefix":"10.1093","volume":"99","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7582-4763","authenticated-orcid":false,"given":"Hyojun","family":"Park","sequence":"first","affiliation":[{"name":"Department of Radiation Oncology, Chung-Ang University Gwangmyeong Hospital , Gyeonggi-do 14353,","place":["Republic of Korea"]},{"name":"Institute of Radiation Medicine, Seoul National University Medical Research Center , Seoul 03080,","place":["Republic of Korea"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8933-9638","authenticated-orcid":false,"given":"Hyejo","family":"Ryu","sequence":"additional","affiliation":[{"name":"Department of Radiation Oncology, Chung-Ang University Gwangmyeong Hospital , Gyeonggi-do 14353,","place":["Republic of Korea"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5568-7984","authenticated-orcid":false,"given":"Jin Hwa","family":"Choi","sequence":"additional","affiliation":[{"name":"Department of Radiation Oncology, Chung-Ang University College of Medicine , Seoul 06974,","place":["Republic of Korea"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5643-1457","authenticated-orcid":false,"given":"So-Yeon","family":"Park","sequence":"additional","affiliation":[{"name":"Institute of Radiation Medicine, Seoul National University Medical Research Center , Seoul 03080,","place":["Republic of Korea"]},{"name":"Department of Radiation Oncology, Veterans Health Service Medical Center , Seoul 05368,","place":["Republic of Korea"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8478-9568","authenticated-orcid":false,"given":"Yoonsuk","family":"Huh","sequence":"additional","affiliation":[{"name":"Institute of Radiation Medicine, Seoul National University Medical Research Center , Seoul 03080,","place":["Republic of Korea"]},{"name":"Biomedical Research Institute, Seoul National University Hospital , Seoul 03080,","place":["Republic of Korea"]},{"name":"Department of Radiation Oncology, Seoul National University Hospital , Seoul 03080,","place":["Republic of Korea"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1153-6842","authenticated-orcid":false,"given":"Seonghee","family":"Kang","sequence":"additional","affiliation":[{"name":"Biomedical Research Institute, Seoul National University Hospital , Seoul 03080,","place":["Republic of Korea"]},{"name":"Department of Radiation Oncology, Seoul National University Hospital , Seoul 03080,","place":["Republic of Korea"]},{"name":"Department of Radiation Oncology, Seoul National University College of Medicine , Seoul 03080,","place":["Republic of Korea"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0449-1372","authenticated-orcid":false,"given":"Chang Heon","family":"Choi","sequence":"additional","affiliation":[{"name":"Biomedical Research Institute, Seoul National University Hospital , Seoul 03080,","place":["Republic of Korea"]},{"name":"Department of Radiation Oncology, Seoul National University Hospital , Seoul 03080,","place":["Republic of Korea"]},{"name":"Department of Radiation Oncology, Seoul National University College of Medicine , Seoul 03080,","place":["Republic of Korea"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0305-5969","authenticated-orcid":false,"given":"Jung-In","family":"Kim","sequence":"additional","affiliation":[{"name":"Biomedical Research Institute, Seoul National University Hospital , Seoul 03080,","place":["Republic of Korea"]},{"name":"Department of Radiation Oncology, Seoul National University Hospital , Seoul 03080,","place":["Republic of Korea"]},{"name":"Department of Radiation Oncology, Seoul National University College of Medicine , Seoul 03080,","place":["Republic of Korea"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8578-9976","authenticated-orcid":false,"given":"Minsoo","family":"Chun","sequence":"additional","affiliation":[{"name":"Department of Radiation Oncology, Chung-Ang University Gwangmyeong Hospital , Gyeonggi-do 14353,","place":["Republic of Korea"]},{"name":"Institute of Radiation Medicine, Seoul National University Medical Research Center , Seoul 03080,","place":["Republic of Korea"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2026,8,21]]},"reference":[{"key":"2026102204082544200_tqag197-B1","doi-asserted-by":"publisher","first-page":"1946","DOI":"10.1118\/1.3690466","article-title":"Quality assurance for image-guided radiation therapy utilizing CT-based technologies: a report of the AAPM TG-179","volume":"39","author":"Bissonnette","year":"2012","journal-title":"Med 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