{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T22:39:28Z","timestamp":1785451168939,"version":"3.56.0"},"reference-count":42,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2024,6,28]],"date-time":"2024-06-28T00:00:00Z","timestamp":1719532800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Medical Radiation Sci"],"published-print":{"date-parts":[[2024,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Introduction<\/jats:title><jats:p>Image quality reduction due to metallic artefacts is a significant challenge during vascular computed tomography (CT) imaging of the lower extremities in patients with hip prostheses. This study aims to analyse various reconstruction algorithms' ability to reduce metal artefacts due to two types of hip prostheses during lower extremity CT angiography examinations.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A pelvis phantom was fabricated with the insertion of a tube filled with contrast media to simulate the femoral artery, and the phantom was then CT scanned with and without hip prostheses. Multimodal images were acquired using different kilovoltage peak (kVp) settings and reconstructed with different algorithms, such as filtered back projection (FBP), iterative reconstruction (iDose<jats:sup>4<\/jats:sup>), iterative model\u2010based reconstruction (IMR) and orthopaedic metal artefact reduction (O\u2010MAR). Image quality was assessed based on image noise, signal\u2010to\u2010noise ratio (SNR) and Hounsfield unit (HU) deviation.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The IMR approach significantly improved image quality compared to iDose<jats:sup>4<\/jats:sup> and FBP. For the vascular region, O\u2010MAR improves SNR by 5\u2009\u00b1\u20091, 23\u2009\u00b1\u20095 and 42\u2009\u00b1\u20099 for FBP, iDose<jats:sup>4<\/jats:sup> and IMR respectively, and improves HU precision towards the baseline values by 49% and 83% for FBP and IMR, respectively. The noise reduction was 71% and 89% for FBP and IMR, and 57% for iDose<jats:sup>4<\/jats:sup>. O\u2010MAR greatly enhances SNR corrections among the most severe artefacts, with 29\u2009\u00b1\u20091 and 43\u2009\u00b1\u20094 for FBP and IMR, compared to iDose<jats:sup>4<\/jats:sup> by 37\u2009\u00b1\u20097.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>IMR combined with O\u2010MAR could improve the CT angiography of the lower extremities of patients with a hip prosthesis.<\/jats:p><\/jats:sec>","DOI":"10.1002\/jmrs.797","type":"journal-article","created":{"date-parts":[[2024,6,28]],"date-time":"2024-06-28T18:20:18Z","timestamp":1719598818000},"page":"421-431","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Reduction of metal artefacts from bilateral hip prostheses during lower extremity computed tomography angiography: an experimental phantom study"],"prefix":"10.1002","volume":"71","author":[{"given":"Omarah 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