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MRIs included pre-enhanced T1-weighted, coronal fat-Suppressed T2-weighted (FS-T2W) and enhanced T1-weighted imaging. The clinical and MRI dates were reviewed. The gold standard of SIF was based on radiologic findings, clinical data and follow-up at least 12\u00a0months.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>28 patients (10.8%) with 47 sites were diagnosed with SIFs, including 9 patients with unilateral SIF and 19 patients with bilateral SIFs. The median age was 60\u00a0years (range 41\u201372\u00a0years), and 89.3% (25\/28) of patients were postmenopausal. 64.3% (18\/28) of patients were symptomatic, and 53.6% of patients (15\/28) had concomitant pelvic fractures. The median interval time from RT to SIFs was 10\u00a0months (range 3\u201334\u00a0months). For the lesion-wise analysis based on all MR images, all lesions were detected by visualizing bone marrow edema patterns, and fracture lines were detected in 64.6% (31\/47) of SIFs. No soft-tissue tumors were founded. For each MRI sequence analysis, coronal FS-T2WI detected the most bone marrow edema pattern and fracture line than T1WI or enhanced T1WI.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>SIF is a common complication in cervical cancer after radiotherapy, which has some certain clinical and MRI features. Coronal FS-T2WI may be more useful to detect and characterize these fractures than other imaging sequences.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12905-022-01758-2","type":"journal-article","created":{"date-parts":[[2022,5,13]],"date-time":"2022-05-13T11:09:48Z","timestamp":1652440188000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Clinical and MRI features of sacral insufficiency fractures after radiotherapy in patients with cervical cancer"],"prefix":"10.1186","volume":"22","author":[{"given":"Xi","family":"Zhong","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Linqi","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tianfa","family":"Dong","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hui","family":"Mai","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bingui","family":"Lu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lu","family":"Huang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiansheng","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2022,5,13]]},"reference":[{"issue":"6","key":"1758_CR1","doi-asserted-by":"publisher","first-page":"1102","DOI":"10.1093\/jrr\/rrt055","volume":"54","author":"H Uezono","year":"2013","unstructured":"Uezono H, Tsujino K, Moriki K, Nagano F, Ota Y, Sasaki R, Soejima T. 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