{"entity": "journal", "iuid": "425307014ad74e1ebeb8165402567a8e", "timestamp": "2026-09-26T23:26:02.496Z", "links": {"self": {"href": "https://publications-affiliated.scilifelab.se/journal/Eur%20J%20Radiol.json"}, "display": {"href": "https://publications-affiliated.scilifelab.se/journal/Eur%20J%20Radiol"}}, "title": "Eur J Radiol", "issn": "1872-7727", "issn-l": null, "publications_count": 1, "publications": [{"entity": "publication", "iuid": "a26a2218f9eb4624b7614c2e7fd31aac", "links": {"self": {"href": "https://publications-affiliated.scilifelab.se/publication/a26a2218f9eb4624b7614c2e7fd31aac.json"}, "display": {"href": "https://publications-affiliated.scilifelab.se/publication/a26a2218f9eb4624b7614c2e7fd31aac"}}, "title": "Spectral photon-counting CT: Image quality evaluation using a metal-containing bovine bone specimen.", "authors": [{"family": "Bj\u00f6rkman", "given": "Ann-Sofi", "initials": "AS"}, {"family": "Malusek", "given": "Alexandr", "initials": "A"}, {"family": "Gauffin", "given": "H\u00e5kan", "initials": "H"}, {"family": "Persson", "given": "Anders", "initials": "A"}, {"family": "Koskinen", "given": "Seppo K", "initials": "SK"}], "type": "journal article", "published": "2023-11-00", "journal": {"title": "Eur J Radiol", "issn": "1872-7727", "volume": "168", "pages": "111110", "issn-l": null}, "abstract": "To find the optimal imaging parameters for a photon-counting detector CT (PCD-CT) and to compare it to an energy-integrating detector CT (EID-CT) in terms of image quality and metal artefact severity using a metal-containing bovine knee specimen.\n\nA bovine knee with a stainless-steel plate and screws was imaged in a whole-body research PCD-CT at 120 kV and 140 kV and in an EID dual-source CT (DSCT) at Sn150 kV and 80/Sn150 kV. PCD-CT virtual monoenergetic 72 and 150 keV images and EID-CT images processed with and without metal artefact reduction algorithms (iMAR) were compared. Four radiologists rated the visualisation of bony structures and metal artefact severity. The Friedman test and Wilcoxon signed-rank test with Bonferroni's correction were used. P-values of \u2264 0.0001 were considered statistically significant. Distributions of HU values of regions of interest (ROIs) in artefact-affected areas were analysed.\n\nPCD-CT 140 kV 150 keV images received the highest scores and were significantly better than EID-CT Sn150 kV images. PCD-CT 72 keV images were rated significantly lower than all the others. HU-value variation was larger in the 120 kV and the 72 keV images. The ROI analysis revealed no large difference between scanners regarding artefact severity.\n\nPCD-CT 140 kV 150 keV images of a metal-containing bovine knee specimen provided the best image quality. They were superior to, or as good as, the best EID-CT images; even without the presumed advantage of tin filter and metal artefact reduction algorithms. PCD-CT is a promising method for reducing metal artefacts.", "doi": "10.1016/j.ejrad.2023.111110", "pmid": "37788519", "labels": [], "xrefs": [{"db": "pii", "key": "S0720-048X(23)00424-2"}], "notes": [], "created": "2026-09-23T11:27:09.428Z", "modified": "2026-09-23T11:27:09.496Z"}], "created": "2026-09-23T11:27:09.439Z", "modified": "2026-09-23T11:27:09.439Z"}