{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,17]],"date-time":"2026-02-17T13:20:51Z","timestamp":1771334451136,"version":"3.50.1"},"reference-count":43,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2024,7,10]],"date-time":"2024-07-10T00:00:00Z","timestamp":1720569600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100012226","name":"Fundamental Research Funds for the Central Universities","doi-asserted-by":"publisher","award":["KY2030000197"],"award-info":[{"award-number":["KY2030000197"]}],"id":[{"id":"10.13039\/501100012226","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["aapm.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Medical Physics"],"published-print":{"date-parts":[[2024,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Cone beam CT (CBCT) is widely utilized in clinics. However, the scatter artifact degrades the CBCT image quality, hampering the expansion of CBCT applications. Recently, beam\u2010blocker methods have been used for CBCT scatter correction and proved their high cost\u2010effectiveness.<\/jats:p><\/jats:sec><jats:sec><jats:title>Purpose<\/jats:title><jats:p>A rotating beam\u2010blocker (RBB) method for CBCT scatter correction was proposed to complete scatter correction and image reconstruction within a single scan in both full\u2010 and half\u2010fan scan scenarios.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>The RBB consisted of two open regions and two blocked regions, and was designed as a centrosymmetric structure. The open and blocked projections could be alternatively obtained within one single rotation. The open projections were corrected with the scatter signal calculated from the blocked projections, and then used to reconstruct the 3D image via the Feldkamp\u2010Davis\u2010Kress algorithm. The performance of the RBB method was evaluated on head and pelvis phantoms in scenarios with and without a bowtie filter. The images obtained from nine repeated scans in each scenario were used to calculate the evaluation metrics including the CT number error, spatial nonuniformity (SNU) and contrast\u2010to\u2010noise ratio (CNR).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>For the head phantom, the CT number error was decreased to\u00a0&lt;5 after scatter correction from\u00a0&gt;200 HU before correction when scanned without a bowtie filter, and to\u00a0&lt;4 from\u00a0&gt;160 HU when scanned with a full bowtie filter. For the pelvis phantom, the CT number error was reduced to\u00a0&lt;12 after scatter correction from\u00a0&gt;250 HU before correction when scanned without a bowtie filter, and to\u00a0&lt;10 from\u00a0&gt;190 HU when scanned with a half bowtie filter. After scatter correction, the uniformity and contrast were both improved, resulting in an SNU of\u00a0&gt;79% decrease and CNR of\u00a0&gt;2 times increase, respectively.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>High\u2010quality CBCT images could be obtained in a single scan after using the proposed RBB method for scatter correction, enabling more accurate image guidance for surgery and radiation therapy applications. With almost no time delay between the successive open and blocked projections, the RBB method could eliminate the motion\u2010induced anatomical mismatches between the corresponding open and blocked projections and could find particular usefulness in thoracic and abdominal imaging.<\/jats:p><\/jats:sec>","DOI":"10.1002\/mp.17274","type":"journal-article","created":{"date-parts":[[2024,7,10]],"date-time":"2024-07-10T08:41:26Z","timestamp":1720600886000},"page":"7320-7331","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["A rotating beam\u2010blocker method for cone beam CT scatter correction"],"prefix":"10.1002","volume":"51","author":[{"given":"Hehe","family":"Cui","sequence":"first","affiliation":[{"name":"Department of Engineering and Applied Physics University of Science and Technology of China  Hefei Anhui People's Republic of China"},{"name":"Cancer Center Union Hospital Tongji Medical College Huazhong University of Science and Technology  Wuhan People's Republic of China"},{"name":"Institute of Radiation Oncology Union Hospital Tongji Medical College Huazhong University of Science and Technology  Wuhan People's Republic of China"},{"name":"Hubei Key Laboratory of Precision Radiation Oncology Union Hospital Tongji Medical College Huazhong University of Science and Technology  Wuhan People's Republic of China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Haolin","family":"Zhan","sequence":"additional","affiliation":[{"name":"Department of Engineering and Applied Physics University of Science and Technology of China  Hefei Anhui People's Republic of China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaogang","family":"Yuan","sequence":"additional","affiliation":[{"name":"Department of Engineering and Applied Physics University of Science and Technology of China  Hefei Anhui People's Republic of China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yidong","family":"Yang","sequence":"additional","affiliation":[{"name":"Department of Engineering and Applied Physics University of Science and Technology of China  Hefei Anhui People's Republic of China"},{"name":"Department of Radiation Oncology the First Affiliated Hospital of USTC Division of Life Sciences and Medicine University of Science and Technology of China  Hefei Anhui People's Republic of China"},{"name":"Ion Medical Research Institute University of Science and Technology of China  Hefei Anhui People's Republic of China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2024,7,10]]},"reference":[{"key":"e_1_2_9_1_1","doi-asserted-by":"publisher","DOI":"10.1259\/dmfr.20120443"},{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cden.2008.05.005"},{"key":"e_1_2_9_3_1","doi-asserted-by":"crossref","unstructured":"KendlbacherP TkatschenkoD CzabankaM et\u00a0al.Workflow and performance of intraoperative CT cone\u2010beam CT and robotic cone\u2010beam CT for spinal navigation in 503 consecutive patients. 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