{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,27]],"date-time":"2026-05-27T18:02:52Z","timestamp":1779904972790,"version":"3.53.1"},"reference-count":43,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2011,10,20]],"date-time":"2011-10-20T00:00:00Z","timestamp":1319068800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2015,9,1]],"date-time":"2015-09-01T00:00:00Z","timestamp":1441065600000},"content-version":"tdm","delay-in-days":1412,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/100000002","name":"NIH","doi-asserted-by":"publisher","award":["1R21EB012700-01A1"],"award-info":[{"award-number":["1R21EB012700-01A1"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["1R21EB012700\u201001A1"],"award-info":[{"award-number":["1R21EB012700\u201001A1"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["1R21EB012700-01A1"],"award-info":[{"award-number":["1R21EB012700-01A1"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["aip.org"],"crossmark-restriction":true},"short-container-title":["Medical Physics"],"published-print":{"date-parts":[[2011,11]]},"abstract":"<jats:sec><jats:title><jats:bold>Purpose:<\/jats:bold><\/jats:title><jats:p>Applications of volumetric CT (VCT) are hampered by shading and streaking artifacts in the reconstructed images. These artifacts are mainly due to strong x\u2010ray scatter signals accompanied with the large illumination area within one projection, which lead to CT number inaccuracy, image contrast loss and spatial nonuniformity. Although different scatter correction algorithms have been proposed in literature, a standard solution still remains unclear. Measurement\u2010based methods use a beam blocker to acquire scatter samples. These techniques have unrivaled advantages over other existing algorithms in that they are simple and efficient, and achieve high scatter estimation accuracy without prior knowledge of the imaged object. Nevertheless, primary signal loss is inevitable in the scatter measurement, and multiple scans or moving the beam blocker during data acquisition are typically employed to compensate for the missing primary data. In this paper, we propose a new measurement\u2010based scatter correction algorithm without primary compensation for full\u2010fan VCT. An accurate reconstruction is obtained with one single\u2010scan and a stationary x\u2010ray beam blocker, two seemingly incompatible features which enable simple and efficient scatter correction without increase of scan time or patient dose.<\/jats:p><\/jats:sec><jats:sec><jats:title><jats:bold>Methods:<\/jats:bold><\/jats:title><jats:p>Based on the CT reconstruction theory, we distribute the blocked data over the projection area where primary signals are considered approximately redundant in a full scan, such that the CT image quality is not degraded even with primary loss. Scatter is then accurately estimated by interpolation and scatter\u2010corrected CT images are obtained using an FDK\u2010based reconstruction algorithm.<\/jats:p><\/jats:sec><jats:sec><jats:title><jats:bold>Results:<\/jats:bold><\/jats:title><jats:p>The proposed method is evaluated using two phantom studies on a tabletop CBCT system. On the Catphan\u00a9600 phantom, our approach reduces the reconstruction error from 207 Hounsfield unit (HU) to 9 HU in the selected region of interest, and improves the image contrast by a factor of 2.0 in the high\u2010contrast regions. On an anthropomorphic head phantom, the reconstruction error is reduced from 97 HU to 6 HU in the soft tissue region and image spatial nonuniformity decreases from 27% to 5% after correction.<\/jats:p><\/jats:sec><jats:sec><jats:title><jats:bold>Conclusions:<\/jats:bold><\/jats:title><jats:p>Our method inherits the main advantages of measurement\u2010based methods while avoiding their shortcomings. It has the potential to become a practical scatter correction solution widely implementable on different VCT systems.<\/jats:p><\/jats:sec>","DOI":"10.1118\/1.3651619","type":"journal-article","created":{"date-parts":[[2011,10,20]],"date-time":"2011-10-20T22:01:47Z","timestamp":1319148107000},"page":"6027-6038","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":95,"title":["Scatter correction for full\u2010fan volumetric CT using a stationary beam blocker in a single full scan"],"prefix":"10.1002","volume":"38","author":[{"given":"Tianye","family":"Niu","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lei","family":"Zhu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2011,10,20]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1118\/1.2241938"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1088\/0031-9155\/53\/20\/010"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1177\/153303461000900208"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11886-009-0075-z"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1118\/1.3246352"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.2174\/157340510791268515"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1118\/1.3298014"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.1118\/1.3130047"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1118\/1.1286590"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.1118\/1.1357457"},{"key":"e_1_2_7_12_1","doi-asserted-by":"publisher","DOI":"10.1118\/1.1819789"},{"key":"e_1_2_7_13_1","first-page":"1Z1","article-title":"Efficient scatter correction using asymmetric kernels","volume":"7258","author":"Star\u2010Lack J.","year":"2009","journal-title":"Proc. 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