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This study aimed to compare tumour boundary lines on computed tomography\/magnetic resonance (CT\/MR) images with those from pathological findings during the preoperative assessment of mandibular invasion by oral squamous cell carcinoma (OSCC). By comparing the methods, the potential of CT\/MR for this application could be further elucidated.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Eight patients with OSCC were imaged with CT\/MR, mandibular specimens were collected, and the material site was measured. Haematoxylin\u2013eosin staining was used for histopathological assessment. The presence and boundaries of bone invasion were evaluated. The CT\/MR and histopathological boundaries of bone invasion were delineated and merged to compare and calculate the deviation of CT\/MR and histopathological boundaries using the Fr\u00e9chet distance.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The mean Fr\u00e9chet distance between the CT and pathological tumour boundaries was 2.69\u00a0mm (standard error 0.46\u00a0mm), with a minimum of 1.18\u00a0mm, maximum of 3.64\u00a0mm, median of 3.10\u00a0mm, and 95% confidence interval of 1.40\u20133.97\u00a0mm. The mean Fr\u00e9chet distance between the tumour boundaries on the MR and pathological images was 3.07\u00a0mm (standard error 0.56\u00a0mm), with a minimum of 1.53\u00a0mm, maximum of 4.74\u00a0mm, median of 2.90\u00a0mm, and 95% confidence interval of 1.53\u20134.61\u00a0mm.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>CT\/MR imaging can provide an effective preoperative assessment of mandibular invasion of OSCC. Pathology images can be positioned on CT\/MR scans with the help of computer software to improve the accuracy of the findings. The introduction of the Fr\u00e9chet distance to compare tumour boundary lines is conducive to computer image diagnosis of tumour invasion of jaw boundaries.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s12903-024-03920-8","type":"journal-article","created":{"date-parts":[[2024,2,2]],"date-time":"2024-02-02T09:03:41Z","timestamp":1706864621000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Computed tomography\/magnetic resonance imaging for mandibular boundary invasion of oral squamous cell carcinoma assessment"],"prefix":"10.1186","volume":"24","author":[{"given":"Yingding","family":"Ye","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xianglong","family":"Zheng","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tanhui","family":"Chen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ke","family":"Zheng","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jie","family":"Pan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lisong","family":"Lin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,2,2]]},"reference":[{"key":"3920_CR1","volume-title":"AJCC Cancer Staging Manual","year":"2017","unstructured":"Mahul BA, Frederick LG, Stephen BE, Carolyn CC, Jeffrey EG, Robert KB, et al. editors. 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