{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,27]],"date-time":"2026-05-27T22:49:51Z","timestamp":1779922191326,"version":"3.53.1"},"reference-count":27,"publisher":"IOP Publishing","issue":"1","license":[{"start":{"date-parts":[[2026,1,9]],"date-time":"2026-01-09T00:00:00Z","timestamp":1767916800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,1,9]],"date-time":"2026-01-09T00:00:00Z","timestamp":1767916800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/info\/page\/text-and-data-mining"}],"content-domain":{"domain":["iopscience.iop.org"],"crossmark-restriction":false},"short-container-title":["Phys. Med. Biol."],"published-print":{"date-parts":[[2026,1,14]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    <jats:italic>Objective.<\/jats:italic>\n                    The aim of this study is to investigate the relation between two figures of merit for the low contrast resolution of computed tomography (CT) imaging systems, with the perspective of its use for acceptance and constancy testing.\n                    <jats:italic>Approach.<\/jats:italic>\n                    We use simulated data as well as 29 CT image datasets of the MITA body phantom CCT189 obtained using a previously published protocol, including CT devices from five different manufacturers and various image reconstruction methods. From these data, the detectability index\n                    <jats:italic>d<\/jats:italic>\n                    \u2032 is determined using the channelised Hotelling observer (CHO), which requires hundreds of images per setting. We compare\n                    <jats:italic>d<\/jats:italic>\n                    \u2032 to the minimum detectable contrast (MDC), a statistically defined measure of low contrast detectability, that can be determined using only few images per setting.\n                    <jats:italic>Main results.<\/jats:italic>\n                    For the CHO with circular symmetric DDOG (dense difference of Gaussians) channels,\n                    <jats:italic>d<\/jats:italic>\n                    \u2032 is proportional to the inverse of the product of MDC and the diameter of the object to be detected. The proportionality factor depends strongly on the texture of the noise.\n                    <jats:italic>Significance.<\/jats:italic>\n                    The findings provide the basis for the development of an acceptance and constancy test for CT low contrast resolution, making use of\n                    <jats:italic>d<\/jats:italic>\n                    \u2032CHO and MDC.\n                  <\/jats:p>","DOI":"10.1088\/1361-6560\/ae2c3a","type":"journal-article","created":{"date-parts":[[2025,12,12]],"date-time":"2025-12-12T22:53:14Z","timestamp":1765579994000},"page":"015036","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":1,"title":["Channelised Hotelling observer detectability index vs minimum detectable contrast for x-ray computed tomography"],"prefix":"10.1088","volume":"71","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-7143-1725","authenticated-orcid":true,"given":"M","family":"Anton","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-6744-7964","authenticated-orcid":true,"given":"P","family":"Kunert","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-1161-4317","authenticated-orcid":true,"given":"M","family":"G\u00f6ppel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3227-0032","authenticated-orcid":true,"given":"H","family":"de las Heras Gala","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5811-6036","authenticated-orcid":true,"given":"M","family":"Reginatto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"266","published-online":{"date-parts":[[2026,1,9]]},"reference":[{"key":"pmbae2c3abib1","doi-asserted-by":"publisher","first-page":"473","DOI":"10.1364\/JOSAA.18.000473","type":"journal-article","article-title":"Human- and model-observer performance in ramp-spectrum noise: effects of regularization and object variability","volume":"18","author":"Abbey","year":"2001","journal-title":"J. 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Published on behalf of Institute of Physics and Engineering in Medicine by IOP Publishing Ltd","name":"copyright_information","label":"Copyright Information"},{"value":"2025-09-24","name":"date_received","label":"Date Received","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2025-12-12","name":"date_accepted","label":"Date Accepted","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2026-01-09","name":"date_epub","label":"Online publication date","group":{"name":"publication_dates","label":"Publication dates"}}]}}