{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,13]],"date-time":"2026-08-13T19:41:12Z","timestamp":1786650072354,"version":"build-2736575974"},"reference-count":18,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"7","license":[{"start":{"date-parts":[[2025,7,1]],"date-time":"2025-07-01T00:00:00Z","timestamp":1751328000000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-sa\/4.0"}],"content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"abstract":"Abstract<\/jats:title>\n \n Background:<\/jats:title>\n During chest CT examinations, the breasts are exposed to a significant amount of radiation, increasing the risk of radiation-induced cancers. The objective of this study is to develop and evaluate a novel silicon rubber-barium sulfate (BaSO4) composite breast shield for reducing radiation dose in chest computed tomography (CT) examinations while minimizing impact on image quality.<\/jats:p>\n <\/jats:sec>\n \n Methods:<\/jats:title>\n Four breast shields were fabricated: one with 10% bismuth and three with 10%, 15%, and 20% BaSO4. Dose reduction was assessed using a thorax phantom and ionization chamber. Image quality effects were evaluated in the thorax phantom by measuring noise and CT number changes. The 10% barium shield was further tested on 22 patients undergoing chest CT.<\/jats:p>\n <\/jats:sec>\n \n Results:<\/jats:title>\n The 10%, 15%, and 20% barium shields reduced breast dose by 36.8%, 38.6%, and 45.6%, respectively, while the 10% bismuth shield achieved a 63.1% reduction. However, the 10% barium shield had minimal impact on image quality, increasing lung noise by only 0.3 Hounsfield units (HU) and shifting CT numbers by 4.7 HU. In patient studies, 81.8% of scans showed no artifacts, with 18.2% showing slight artifacts.<\/jats:p>\n <\/jats:sec>\n \n Conclusion:<\/jats:title>\n The 10% BaSO4 shield effectively reduced breast dose while maintaining image quality, presenting a viable alternative to bismuth shielding for radiation protection in chest CT examinations.<\/jats:p>\n <\/jats:sec>","DOI":"10.4103\/jmss.jmss_61_24","type":"journal-article","created":{"date-parts":[[2025,7,11]],"date-time":"2025-07-11T10:00:10Z","timestamp":1752228010000},"update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":1,"title":["Balancing Radiation Dose Reduction and Image Quality in Chest Computed Tomography using Silicon Rubber-barium Sulfate Composite Shield"],"prefix":"10.4103","volume":"15","author":[{"given":"Mohammad","family":"Keshtkar","sequence":"first","affiliation":[{"name":"Department of Medical Physics and Radiology, Infectious Diseases Research Centre, Faculty of Medicine, Gonabad University of Medical Sciences, Gonabad, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Saeedeh","family":"Yazdanifar","sequence":"additional","affiliation":[{"name":"Student Research Committee, Gonabad University of Medical Sciences, Gonabad, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","published-online":{"date-parts":[[2025,7]]},"reference":[{"key":"R2-20250711","doi-asserted-by":"crossref","first-page":"736","DOI":"10.1007\/s11547-019-01034-8","article-title":"Protecting sensitive patient groups from imaging using ionizing radiation: Effects during pregnancy, in fetal life and childhood","volume":"124","author":"Tom\u00e0","year":"2019","journal-title":"Radiol Med"},{"key":"R3-20250711","doi-asserted-by":"crossref","first-page":"110452","DOI":"10.1016\/j.apradiso.2022.110452","article-title":"Assessment of breast dose and cancer risk for young females during CT chest and abdomen 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