{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,12]],"date-time":"2026-03-12T12:54:26Z","timestamp":1773320066251,"version":"3.50.1"},"reference-count":49,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2010,12,14]],"date-time":"2010-12-14T00:00:00Z","timestamp":1292284800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100000054","name":"National Cancer Institute","doi-asserted-by":"publisher","award":["CA124585"],"award-info":[{"award-number":["CA124585"]}],"id":[{"id":"10.13039\/100000054","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000054","name":"National Cancer Institute","doi-asserted-by":"publisher","award":["CA104759"],"award-info":[{"award-number":["CA104759"]}],"id":[{"id":"10.13039\/100000054","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000070","name":"National Institute of Biomedical Imaging and Bioengineering","doi-asserted-by":"publisher","award":["EB000117"],"award-info":[{"award-number":["EB000117"]}],"id":[{"id":"10.13039\/100000070","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Medical Physics"],"published-print":{"date-parts":[[2011,1]]},"abstract":"<jats:sec><jats:title>Purpose:<\/jats:title><jats:p>To investigate and compare the scatter rejection properties and low\u2010contrast performance of the scan equalization digital radiography (SEDR) technique to the slot\u2010scan and conventional full\u2010field digital radiography techniques for chest imaging.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods:<\/jats:title><jats:p>A prototype SEDR system was designed and constructed with an a\u2010Se flat\u2010panel (FP) detector to improve image quality in heavily attenuating regions of an anthropomorphic chest phantom. Slot\u2010scanning geometry was used to reject scattered radiation without attenuating primary x rays. The readout scheme of the FP was modified to erase accumulated scatter signals prior to image readout. A 24\u2010segment beam width modulator was developed to regulate x\u2010ray exposures regionally and compensate for the low x\u2010ray flux in heavily attenuating regions. To measure the scatter\u2010to\u2010primary ratios (SPRs), a 2 mm thick lead plate with a 2\u2010D array of aperture holes was used to measure the primary signals, which were then subtracted from those obtained without the lead plate to determine scatter components. A 2\u2010D array of aluminum beads (3 mm in diameter) was used as the low\u2010contrast objects to measure the contrast ratios (CRs) and contrast\u2010to\u2010noise ratios (CNRs) for evaluating the low\u2010contrast performance in chest phantom images. A set of two images acquired with the same techniques were subtracted from each other to measure the noise levels. SPRs, CRs, and CNRs of the SEDR images were measured in four anatomical regions of chest phantom images and compared to those of slot\u2010scan images and full\u2010field images acquired with and without antiscatter grid.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results:<\/jats:title><jats:p>The percentage reduction of SPR (percentage of SPRs reduced with scatter removal\/rejection methods relative to that for nongrid full\u2010field imaging) averaged over four anatomical regions was measured to be 80%, 83%, and 71% for SEDR, slot\u2010scan, and full\u2010field with grid, respectively. The average CR over four regions was found to improve over that for nongrid full\u2010field imaging by 259%, 279%, and 145% for SEDR, slot\u2010scan, and full\u2010field with grid, respectively. The average CNR over four regions was found to improve over that for nongrid full\u2010field imaging by 201% for SEDR as compared to 133% for the slot\u2010scan technique and 14% for the antiscatter grid method.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions:<\/jats:title><jats:p>Both SEDR and slot\u2010scan techniques outperformed the antiscatter grid method used in standard full\u2010field radiography. For imaging with the same effective exposure, the SEDR technique offers no advantage over the slot\u2010scan method in terms of SPRs and CRs. However, it improves CNRs significantly, especially in heavily attenuating regions. The improvement of low\u2010contrast performance may help improve the detection of the lung nodules or other abnormalities and may offer SEDR the potential for dose reduction in chest radiography.<\/jats:p><\/jats:sec>","DOI":"10.1118\/1.3519903","type":"journal-article","created":{"date-parts":[[2010,12,31]],"date-time":"2010-12-31T01:51:59Z","timestamp":1293760319000},"page":"23-33","source":"Crossref","is-referenced-by-count":10,"title":["Comparison of scatter rejection and low\u2010contrast performance of scan equalization digital radiography (SEDR), slot\u2010scan digital radiography, and full\u2010field digital radiography systems for chest phantom imaging"],"prefix":"10.1002","volume":"38","author":[{"given":"Xinming","family":"Liu","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chris 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