{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,13]],"date-time":"2026-02-13T19:29:33Z","timestamp":1771010973297,"version":"3.50.1"},"reference-count":25,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2024,3,22]],"date-time":"2024-03-22T00:00:00Z","timestamp":1711065600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100011699","name":"Siemens Healthineers Ltd.","doi-asserted-by":"publisher","award":["PC21RISI0003"],"award-info":[{"award-number":["PC21RISI0003"]}],"id":[{"id":"10.13039\/501100011699","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Diagnostics"],"abstract":"<jats:p>Purpose: To develop and validate a deep-learning-based algorithm (DLA) that is designed to segment and classify metallic objects in topograms of abdominal and spinal CT. Methods: DLA training for implant segmentation and classification was based on a U-net-like architecture with 263 annotated hip implant topograms and 2127 annotated spine implant topograms. The trained DLA was validated with internal and external datasets. Two radiologists independently reviewed the external dataset consisting of 2178 abdomen anteroposterior (AP) topograms and 515 spine AP and lateral topograms, all collected in a consecutive manner. Sensitivity and specificity were calculated per pixel row and per patient. Pairwise intersection over union (IoU) was also calculated between the DLA and the two radiologists. Results: The performance parameters of the DLA were consistently &gt;95% in internal validation per pixel row and per patient. DLA can save 27.4% of reconstruction time on average in patients with metallic implants compared to the existing iMAR. The sensitivity and specificity of the DLA during external validation were greater than 90% for the detection of spine implants on three different topograms and for the detection of hip implants on abdominal AP and spinal AP topograms. The IoU was greater than 0.9 between the DLA and the radiologists. However, the DLA training could not be performed for hip implants on spine lateral topograms. Conclusions: A prototype DLA to detect metallic implants of the spine and hip on abdominal and spinal CT topograms improves the scan workflow with good performance for both spine and hip implants.<\/jats:p>","DOI":"10.3390\/diagnostics14070668","type":"journal-article","created":{"date-parts":[[2024,3,22]],"date-time":"2024-03-22T10:03:59Z","timestamp":1711101839000},"page":"668","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Development and Validation of a Deep-Learning-Based Algorithm for Detecting and Classifying Metallic Implants in Abdominal and Spinal CT Topograms"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5962-4772","authenticated-orcid":false,"given":"Moon-Hyung","family":"Choi","sequence":"first","affiliation":[{"name":"Department of Radiology, Eunpyeong St. Mary\u2019s Hospital, College of Medicine, The Catholic University of Korea, Seoul 03312, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Joon-Yong","family":"Jung","sequence":"additional","affiliation":[{"name":"Department of Radiology, Seoul St. Mary\u2019s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhigang","family":"Peng","sequence":"additional","affiliation":[{"name":"Siemens Medical Solutions USA, Inc., Malvern, PA 19355, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0076-2377","authenticated-orcid":false,"given":"Stefan","family":"Grosskopf","sequence":"additional","affiliation":[{"name":"Siemens Healthcare GmbH, Computed Tomography, 91301 Forchheim, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michael","family":"Suehling","sequence":"additional","affiliation":[{"name":"Siemens Healthcare GmbH, Computed Tomography, 91301 Forchheim, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christian","family":"Hofmann","sequence":"additional","affiliation":[{"name":"Siemens Healthcare GmbH, Computed Tomography, 91301 Forchheim, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Seongyong","family":"Pak","sequence":"additional","affiliation":[{"name":"Siemens Healthineers Ltd., Seoul 06620, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,3,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"734","DOI":"10.1016\/j.joca.2014.04.009","article-title":"Utilization rates of hip arthroplasty in OECD countries","volume":"22","author":"Pabinger","year":"2014","journal-title":"Osteoarthr. 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