{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,6]],"date-time":"2026-06-06T07:21:44Z","timestamp":1780730504770,"version":"3.54.1"},"reference-count":37,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2017,7,25]],"date-time":"2017-07-25T00:00:00Z","timestamp":1500940800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100007890","name":"University of North Carolina at Chapel Hill","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100007890","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Medical Physics"],"published-print":{"date-parts":[[2017,9]]},"abstract":"<jats:sec><jats:title>Purpose<\/jats:title><jats:p>The aim of this study was to characterize a new generation stationary digital breast tomosynthesis system with higher tube flux and increased angular span over a first generation system.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>The linear <jats:styled-content style=\"fixed-case\">CNT<\/jats:styled-content> x\u2010ray source was designed, built, and evaluated to determine its performance parameters. The second generation system was then constructed using the <jats:styled-content style=\"fixed-case\">CNT<\/jats:styled-content> x\u2010ray source and a Hologic gantry. Upon construction, test objects and phantoms were used to characterize system resolution as measured by the modulation transfer function (<jats:styled-content style=\"fixed-case\">MTF<\/jats:styled-content>), and artifact spread function (<jats:styled-content style=\"fixed-case\">ASF<\/jats:styled-content>).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The results indicated that the linear <jats:styled-content style=\"fixed-case\">CNT<\/jats:styled-content> x\u2010ray source was capable of stable operation at a tube potential of 49\u00a0<jats:styled-content style=\"fixed-case\">kV<\/jats:styled-content>p, and measured focal spot sizes showed source\u2010to\u2010source consistency with a nominal focal spot size of 1.1\u00a0mm. After construction, the second generation (Gen 2) system exhibited entrance surface air kerma rates two times greater the previous s\u2010<jats:styled-content style=\"fixed-case\">DBT<\/jats:styled-content> system. System in\u2010plane resolution as measured by the <jats:styled-content style=\"fixed-case\">MTF<\/jats:styled-content> is 7.7\u00a0cycles\/mm, compared to 6.7\u00a0cycles\/mm for the Gen 1 system. As expected, an increase in the z\u2010axis depth resolution was observed, with a decrease in the <jats:styled-content style=\"fixed-case\">ASF<\/jats:styled-content> from 4.30\u00a0mm to 2.35\u00a0mm moving from the Gen 1 system to the Gen 2 system as result of an increased angular span.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The results indicate that the Gen 2 stationary digital breast tomosynthesis system, which has a larger angular span, increased entrance surface air kerma, and faster image acquisition time over the Gen 1\u00a0s\u2010<jats:styled-content style=\"fixed-case\">DBT<\/jats:styled-content> system, results in higher resolution images. With the detector operating at full resolution, the Gen 2\u00a0s\u2010<jats:styled-content style=\"fixed-case\">DBT<\/jats:styled-content> system can achieve an in\u2010plane resolution of 7.7\u00a0cycles per mm, which is better than the current commercial <jats:styled-content style=\"fixed-case\">DBT<\/jats:styled-content> systems today, and may potentially result in better patient diagnosis.<\/jats:p><\/jats:sec>","DOI":"10.1002\/mp.12393","type":"journal-article","created":{"date-parts":[[2017,6,1]],"date-time":"2017-06-01T14:02:42Z","timestamp":1496325762000},"page":"4482-4495","source":"Crossref","is-referenced-by-count":19,"title":["Second generation stationary digital breast tomosynthesis system with faster scan time and wider angular span"],"prefix":"10.1002","volume":"44","author":[{"given":"Jabari","family":"Calliste","sequence":"first","affiliation":[{"name":"Department of Applied Physical Sciences University of North Carolina at Chapel Hill 120 E. 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