{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,27]],"date-time":"2026-05-27T10:56:41Z","timestamp":1779879401062,"version":"3.53.1"},"reference-count":11,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2025,9,9]],"date-time":"2025-09-09T00:00:00Z","timestamp":1757376000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2025,9,9]],"date-time":"2025-09-09T00:00:00Z","timestamp":1757376000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Eur Radiol Exp"],"abstract":"<jats:sec>\n            <jats:title>Abstract<\/jats:title>\n            <jats:p>Computed tomography (CT) and magnetic resonance imaging (MRI) are commonly used to assess femoral and tibial torsion. While CT offers high spatial resolution, it involves ionizing radiation. MRI avoids radiation but requires multiple sequences and extended acquisition time. We retrospectively evaluated whether a three-dimensional isotropic MRI localizer (FastView) could serve as a reliable and faster alternative. In this retrospective single-center study, 60 lower limbs from 30 patients, aged 27.1\u2009\u00b1\u200911.5 years (mean\u2009\u00b1\u2009standard deviation), 19 females and 11 males, were assessed using both FastView and a dedicated MRI protocol. FastView (5 \u00d7 5 \u00d7 5\u2009mm<jats:sup>3<\/jats:sup> voxels) imaged the entire lower limb in 17.4\u2009s compared to nearly 7\u2009min for the dedicated protocol. Torsion angles were measured independently by two readers. Agreement between methods was evaluated using intraclass correlation coefficients (ICCs), Bland\u2013Altman plots, and Pearson <jats:italic>R<\/jats:italic>\u00b2. No significant differences in torsion values were found (all <jats:italic>p<\/jats:italic>\u2009&gt;\u20090.305). Femoral (ICC: 0.91\u20130.96) and tibial (ICC: 0.91\u20130.94) torsion showed excellent inter-modality agreement. Inter-reader reliability was also high (ICC: 0.95\u20130.99). Correlation values confirmed strong agreement (<jats:italic>R<\/jats:italic>\u00b2: 0.891\u20130.963). FastView demonstrated accuracy comparable to the dedicated protocol, offering a fast, efficient, and radiation-free option for routine torsion assessment.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Relevance statement<\/jats:title>\n            <jats:p>FastView MRI localizer offers a fast and resource-efficient method for assessing lower limb torsion, potentially replacing standard multisequence protocols in routine clinical practice.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Key Points<\/jats:title>\n            <jats:p>\n              <jats:list list-type=\"bullet\">\n                <jats:list-item>\n                  <jats:p>FastView MRI enables lower limb torsion measurements with full-limb coverage in under 20\u2009s.<\/jats:p>\n                <\/jats:list-item>\n                <jats:list-item>\n                  <jats:p>Torsion angles from FastView and dedicated MRI showed no significant differences.<\/jats:p>\n                <\/jats:list-item>\n                <jats:list-item>\n                  <jats:p>Femoral and tibial ICCs between 0.91 and 0.96 confirm excellent inter-protocol agreement.<\/jats:p>\n                <\/jats:list-item>\n                <jats:list-item>\n                  <jats:p>Inter-reader agreement was consistently high across both protocols.<\/jats:p>\n                <\/jats:list-item>\n                <jats:list-item>\n                  <jats:p>FastView may replace multisequence MRI protocols in routine clinical torsion assessment.<\/jats:p>\n                <\/jats:list-item>\n              <\/jats:list>\n            <\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Graphical Abstract<\/jats:title>\n          <\/jats:sec>","DOI":"10.1186\/s41747-025-00631-9","type":"journal-article","created":{"date-parts":[[2025,9,9]],"date-time":"2025-09-09T16:12:27Z","timestamp":1757434347000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["3D isotropic FastView MRI localizer allows reliable torsion measurements of the lower limb"],"prefix":"10.1186","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-0835-0328","authenticated-orcid":false,"given":"Felix L.","family":"Herr","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Natascha","family":"Hohmann","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christian","family":"Dascalescu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Boj","family":"Hoppe","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hannah","family":"Gildein","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Verena","family":"Sch\u00e4fer","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jens","family":"Ricke","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Boris M.","family":"Holzapfel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lennart","family":"Schr\u00f6der","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nina","family":"Hesse","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J\u00f6rg","family":"Arnholdt","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paul","family":"Reidler","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2025,9,9]]},"reference":[{"key":"631_CR1","doi-asserted-by":"publisher","first-page":"127","DOI":"10.2106\/JBJS.O.00334","volume":"98","author":"V Chadayammuri","year":"2016","unstructured":"Chadayammuri V, Garabekyan T, Bedi A et al (2016) Passive hip range of motion predicts femoral torsion and acetabular version. J Bone Joint Surg Am 98:127\u2013134. https:\/\/doi.org\/10.2106\/JBJS.O.00334","journal-title":"J Bone Joint Surg Am"},{"key":"631_CR2","doi-asserted-by":"publisher","first-page":"205","DOI":"10.2106\/JBJS.17.00376","volume":"100","author":"MJ Kraeutler","year":"2018","unstructured":"Kraeutler MJ, Chadayammuri V, Garabekyan T, Mei-Dan O (2018) Femoral version abnormalities significantly outweigh effect of cam impingement on hip internal rotation. J Bone Joint Surg Am 100:205\u2013210. https:\/\/doi.org\/10.2106\/JBJS.17.00376","journal-title":"J Bone Joint Surg Am"},{"key":"631_CR3","doi-asserted-by":"publisher","first-page":"1169","DOI":"10.2106\/00004623-198769080-00010","volume":"69","author":"SB Murphy","year":"1987","unstructured":"Murphy SB, Simon SR, Kijewski PK, Wilkinson RH, Griscom NT (1987) Femoral anteversion. J Bone Joint Surg Am 69:1169\u20131176","journal-title":"J Bone Joint Surg Am"},{"key":"631_CR4","doi-asserted-by":"publisher","first-page":"1747","DOI":"10.2106\/00004623-199912000-00014","volume":"81","author":"D Tonnis","year":"1999","unstructured":"Tonnis D, Heinecke A (1999) Acetabular and femoral anteversion: relationship with osteoarthritis of the hip. J Bone Joint Surg Am 81:1747\u20131770. https:\/\/doi.org\/10.2106\/00004623-199912000-00014","journal-title":"J Bone Joint Surg Am"},{"key":"631_CR5","doi-asserted-by":"publisher","first-page":"391","DOI":"10.1007\/s11832-012-0434-y","volume":"6","author":"AR Muhamad","year":"2012","unstructured":"Muhamad AR, Freitas JM, Bomar JD, Dwek J, Hosalkar HS (2012) CT and MRI lower extremity torsional profile studies: measurement reproducibility. J Child Orthop 6:391\u2013396. https:\/\/doi.org\/10.1007\/s11832-012-0434-y","journal-title":"J Child Orthop"},{"key":"631_CR6","doi-asserted-by":"publisher","first-page":"381","DOI":"10.1148\/radiol.2020192723","volume":"296","author":"F Schmaranzer","year":"2020","unstructured":"Schmaranzer F, Kallini JR, Miller PE, Kim YJ, Bixby SD, Novais EN (2020) The effect of modality and landmark selection on MRI and CT femoral torsion angles. Radiology 296:381\u2013390. https:\/\/doi.org\/10.1148\/radiol.2020192723","journal-title":"Radiology"},{"key":"631_CR7","doi-asserted-by":"publisher","first-page":"4903","DOI":"10.1007\/s00167-023-07533-6","volume":"31","author":"L Grunwald","year":"2023","unstructured":"Grunwald L, Histing T, Springer F, Keller G (2023) MRI-based torsion measurement of the lower limb is a reliable and valid alternative for CT measurement: a prospective study. Knee Surg Sports Traumatol Arthrosc 31:4903\u20134909. https:\/\/doi.org\/10.1007\/s00167-023-07533-6","journal-title":"Knee Surg Sports Traumatol Arthrosc"},{"key":"631_CR8","doi-asserted-by":"publisher","first-page":"576","DOI":"10.1007\/978-3-540-85988-8_69","volume":"11","author":"M Fenchel","year":"2008","unstructured":"Fenchel M, Thesen S, Schilling A (2008) Automatic labeling of anatomical structures in MR FastView images using a statistical atlas. Med Image Comput Comput Assist Interv 11:576\u2013584. https:\/\/doi.org\/10.1007\/978-3-540-85988-8_69","journal-title":"Med Image Comput Comput Assist Interv"},{"key":"631_CR9","doi-asserted-by":"publisher","first-page":"895","DOI":"10.1007\/s11517-006-0104-7","volume":"44","author":"YS Lee","year":"2006","unstructured":"Lee YS, Oh SH, Seon JK, Song EK, Yoon TR (2006) 3D femoral neck anteversion measurements based on the posterior femoral plane in ORTHODOC system. Med Biol Eng Comput 44:895\u2013906. https:\/\/doi.org\/10.1007\/s11517-006-0104-7","journal-title":"Med Biol Eng Comput"},{"key":"631_CR10","doi-asserted-by":"publisher","first-page":"18","DOI":"10.3109\/17453678308992864","volume":"54","author":"O Reikeras","year":"1983","unstructured":"Reikeras O, Bjerkreim I, Kolbenstvedt A (1983) Anteversion of the acetabulum and femoral neck in normals and in patients with osteoarthritis of the hip. Acta Orthop Scand 54:18\u201323. https:\/\/doi.org\/10.3109\/17453678308992864","journal-title":"Acta Orthop Scand"},{"key":"631_CR11","doi-asserted-by":"publisher","first-page":"791","DOI":"10.2214\/ajr.168.3.9057536","volume":"168","author":"RJ Tomczak","year":"1997","unstructured":"Tomczak RJ, Guenther KP, Rieber A, Mergo P, Ros PR, Brambs HJ (1997) MR imaging measurement of the femoral antetorsional angle as a new technique: comparison with CT in children and adults. AJR Am J Roentgenol 168:791\u2013794. https:\/\/doi.org\/10.2214\/ajr.168.3.9057536","journal-title":"AJR Am J Roentgenol"}],"container-title":["European Radiology Experimental"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1186\/s41747-025-00631-9.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1186\/s41747-025-00631-9\/fulltext.html","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1186\/s41747-025-00631-9.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,9,9]],"date-time":"2025-09-09T16:12:27Z","timestamp":1757434347000},"score":1,"resource":{"primary":{"URL":"https:\/\/eurradiolexp.springeropen.com\/articles\/10.1186\/s41747-025-00631-9"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,9,9]]},"references-count":11,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2025,12]]}},"alternative-id":["631"],"URL":"https:\/\/doi.org\/10.1186\/s41747-025-00631-9","relation":{},"ISSN":["2509-9280"],"issn-type":[{"value":"2509-9280","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,9,9]]},"assertion":[{"value":"6 May 2025","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"27 August 2025","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"9 September 2025","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"This study was approved by the institutional review board of LMU University Hospital Munich (approval number: 23-0020; date of approval: 09 March 2023). All procedures were performed in accordance with relevant institutional guidelines and regulations.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"The requirement for written informed consent was waived due to the retrospective nature of the study.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors declare that they have no competing interests.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"87"}}