{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T22:41:39Z","timestamp":1790203299866,"version":"4.1.0"},"reference-count":39,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2025,7,15]],"date-time":"2025-07-15T00:00:00Z","timestamp":1752537600000},"content-version":"vor","delay-in-days":14,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2025,7,1]],"date-time":"2025-07-01T00:00:00Z","timestamp":1751328000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100002865","name":"Chongqing Municipal Science and Technology Bureau","doi-asserted-by":"publisher","award":["cstc2019jscx\u2010msxmX0162"],"award-info":[{"award-number":["cstc2019jscx\u2010msxmX0162"]}],"id":[{"id":"10.13039\/501100002865","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["aapm.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J Applied Clin Med Phys"],"published-print":{"date-parts":[[2025,7]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Various methods have been employed to reduce radiation dose and improve image quality in head computed tomography (CT); however, the impact of different head tilt angles on these factors remains underexplored.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To investigate the effects of different head tilt angles on radiation dose and image quality in head CT.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and methods<\/jats:title>\n                    <jats:p>\n                      A pediatric anthropomorphic head phantom was scanned using dual\u2010source CT at 18 different tilt angles, repeated 10 times at each angle. Image quality was assessed using mean CT (CT\n                      <jats:sub>mean<\/jats:sub>\n                      ) attenuation values and image noise at six regions of interest (ROIs), while radiation dose was evaluated using volume CT dose index (CTDI\n                      <jats:sub>vol<\/jats:sub>\n                      ), size\u2010specific dose estimate (SSDE), and dose\u2010length product (DLP). The scan lengths of the\u00a0eyes and head were also recorded.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      CTDI\n                      <jats:sub>vol<\/jats:sub>\n                      and SSDE did not exhibit clear variation patterns with changes in head tilt angles, while DLP was in the lower region between \u221210\u00b0 and 5\u00b0. Head scan lengths were relatively shorter between \u221210\u00b0 and 5\u00b0, and eye scan lengths were relatively shorter between \u221210\u00b0 and 0\u00b0. Except for the image noise of the right middle cranial fossa, no significant differences were found in CT\n                      <jats:sub>mean<\/jats:sub>\n                      values and image noise for the other ROIs between \u221210\u00b0 and 0\u00b0.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>The findings indicated that adjusting the head tilt angle within the range of \u221210\u00b0 to 0\u00b0\u00a0reduced both the head and eye scan lengths as well as the radiation dose, while\u00a0preserving\u00a0relatively stable image quality.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/acm2.70177","type":"journal-article","created":{"date-parts":[[2025,7,15]],"date-time":"2025-07-15T07:38:57Z","timestamp":1752565137000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Effects of various tilt angles on radiation dose and image quality in pediatric head computed tomography: A phantom study"],"prefix":"10.1002","volume":"26","author":[{"given":"Hongrong","family":"Xu","sequence":"first","affiliation":[{"name":"Department of Radiology National Clinical Research Center for Child Health and Disorders Ministry of Education Key Laboratory of Child Development and Disorders Chongqing Key Laboratory of Structural Birth Defect and Reconstruction Children's Hospital of Chongqing Medical University  Chongqing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiawen","family":"Zhao","sequence":"additional","affiliation":[{"name":"Department of Radiology National Clinical Research Center for Child Health and Disorders Ministry of Education Key Laboratory of Child Development and Disorders Chongqing Key Laboratory of Structural Birth Defect and Reconstruction Children's Hospital of Chongqing Medical University  Chongqing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhen","family":"Xu","sequence":"additional","affiliation":[{"name":"Department of Radiology National Clinical Research Center for Child Health and Disorders Ministry of Education Key Laboratory of Child Development and Disorders Chongqing Key Laboratory of Structural Birth Defect and Reconstruction Children's Hospital of Chongqing Medical University  Chongqing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bo","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Radiology National Clinical Research Center for Child Health and Disorders Ministry of Education Key Laboratory of Child Development and Disorders Chongqing Key Laboratory of Structural Birth Defect and Reconstruction Children's Hospital of Chongqing Medical University  Chongqing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jinhua","family":"Cai","sequence":"additional","affiliation":[{"name":"Department of Radiology National Clinical Research Center for Child Health and Disorders Ministry of Education Key Laboratory of Child Development and Disorders Chongqing Key Laboratory of Structural Birth Defect and Reconstruction Children's Hospital of Chongqing Medical University  Chongqing China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,7,15]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00330\u2010023\u201010005\u20107"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.radmp.2023.08.001"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.2214\/AJR.11.7273"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1093\/rpd\/ncy066"},{"key":"e_1_2_10_6_1","unstructured":"American Association of Physicists in Medicine. 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