{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T05:50:43Z","timestamp":1791352243816,"version":"4.3.1"},"reference-count":20,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T00:00:00Z","timestamp":1791244800000},"content-version":"vor","delay-in-days":5,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T00:00:00Z","timestamp":1790812800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["aapm.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J Applied Clin Med Phys"],"published-print":{"date-parts":[[2026,10]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Image\u2010guided radiotherapy (IGRT) using cone\u2010beam computed tomography (CBCT) enables highly accurate imaging registration; however, increased radiation exposure remains a concern. Recently, short\u2010arc CBCT (SA\u2010CBCT), which reduces projection data and reconstructs images, has become available. Although previous studies have shown that image quality deteriorates when projection data are reduced, no study has directly evaluated the clinical usefulness of SA\u2010CBCT or its effect on registration accuracy.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>We verified the registration accuracy of SA\u2010CBCT in breast tangential irradiation using an anthropomorphic phantom and clinical data, and examined its clinical feasibility compared with the commonly used 200\u00b0 scan.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      An anthropomorphic phantom was placed on the treatment bed, and CT and CBCT images acquired during treatment planning were aligned. Bed movement was measured for both conventional CBCT and SA\u2010CBCT images. The difference between the two measurements was quantified as\n                      <jats:italic>N<\/jats:italic>\n                      , defined as the norm of the vector difference between CBCT and SA\u2010CBCT registration shifts, to evaluate registration accuracy. The acquisition angle was varied to assess the effects of central and total angles. In the clinical study, registration data from 30 consecutive patients who underwent whole\u2010breast irradiation were analyzed. Data were reconstructed by changing the acquisition angle from 200\u00b0 to 120\u00b0, and\n                      <jats:italic>N<\/jats:italic>\n                      was calculated as in the phantom experiment.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      In the phantom experiment,\n                      <jats:italic>N<\/jats:italic>\n                      was within 0.15\u00a0mm (3\u2010axis) and 0.55\u00a0mm (6\u2010axis) when the acquisition angle was reduced to 120\u00b0. In clinical data, the average\n                      <jats:italic>N<\/jats:italic>\n                      was 0.64\u00a0mm in 3\u2010axis registration (84.7% within 1\u00a0mm) and 0.85\u00a0mm in 6\u2010axis registration (71.3% within 1\u00a0mm). Even with a 120\u00b0 acquisition angle, the body contour and chest wall edges were sufficiently preserved.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>SA\u2010CBCT maintained adequate registration accuracy in breast tangential irradiation. These findings suggest its clinical applicability with appropriate acquisition angle settings.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/acm2.70804","type":"journal-article","created":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T05:10:57Z","timestamp":1791349857000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Evaluation of registration accuracy using short\u2010arc cone\u2010beam computed tomography for image\u2010guided radiotherapy in breast cancer"],"prefix":"10.1002","volume":"27","author":[{"given":"Shuhei","family":"Wada","sequence":"first","affiliation":[{"name":"Graduate School of Advanced Science and Technology Tokushima University  Tokushima Tokushima Japan"},{"name":"Division of Radiology Kansai Medical University Hospital  Hirakata Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masahide","family":"Tominaga","sequence":"additional","affiliation":[{"name":"Graduate School of Biomedical Sciences Tokushima University  Tokushima Tokushima Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Motoharu","family":"Sasaki","sequence":"additional","affiliation":[{"name":"Graduate School of Biomedical Sciences Tokushima University  Tokushima Tokushima Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Koichi","family":"Yamanashi","sequence":"additional","affiliation":[{"name":"Canon Medical Systems Corporation  Otawara Tochigi Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoshio","family":"Iwai","sequence":"additional","affiliation":[{"name":"Research Physics  Minato\u2010ku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shunsuke","family":"Furutani","sequence":"additional","affiliation":[{"name":"Department of Radiology Tokushima Municipal Hospital  Tokushima Tokushima Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yusei","family":"Shinohara","sequence":"additional","affiliation":[{"name":"Graduate School of Technology, Industrial and Social Sciences Tokushima University  Tokushima Tokushima Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoshihiro","family":"Uto","sequence":"additional","affiliation":[{"name":"Graduate School of Technology, Industrial and Social Sciences Tokushima University  Tokushima Tokushima Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,10,6]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijrobp.2009.12.021"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00066\u2010008\u20101874\u20107"},{"key":"e_1_2_11_4_1","doi-asserted-by":"publisher","DOI":"10.1118\/1.2775667"},{"key":"e_1_2_11_5_1","doi-asserted-by":"publisher","DOI":"10.1002\/mp.12824"},{"key":"e_1_2_11_6_1","unstructured":"ICRP.Recommendations international commission radiological protection. 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