ArticleJapanese journal of radiology2021
A three-dimensional measurement method on MR arthrography of the hip to classify femoro-acetabular impingement.
Article in Japanese journal of radiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Is Femoral Head Bone Marrow Edema of Unknown Etiology Associated with Acetabular Overcoverage? A CT-Based Three-Dimensional Study.Tomography (Ann Arbor, Mich.) · 2026Article
- Methods for three-dimensional characterization of the acetabulum prior to pelvic reorientation osteotomy: a scoping review.EFORT open reviews · 2024Article
- Clinical relevance of MR arthrography to classify the types of femoro-acetabular impingement.Japanese journal of radiology · 2022Article
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12 authors.
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No grant is acknowledged in the PubMed record.
Abstract
purpose(1) To investigate correlations between different types of FAI and the ratio of acetabular volume (AV) to femoral head volume (FV) on MR arthrography. (2) To assess 2D/3D measurements in identifying different types of FAI by means of cut-off values of AV/FV ratio (AFR). MATERIALS AND
methodsAlpha angle, cranial acetabular version, acetabular depth, lateral center edge angle, AV, and FV of 52 hip MR arthrography were measured. ANOVA test correlated different types of FAI with AFR. ROC curves classified FAI by cut-off values of AFR. Accuracy of 2D/3D measurements was calculated.
resultsANOVA test showed a significant difference of AFR (p value < 0.001) among the three types of FAI. The mean values of AFR were 0.64, 0.74, and 0.89 in cam, mixed, and pincer types, respectively. Cut-off values of AFR were 0.70 to distinguish cam types from mixed and pincer types, and 0.79 to distinguish pincer types from cam and mixed types. Cut-off values identified 100%, 73.9%, and 55.6% of pincer, cam, and mixed types. 2D and 3D classifications of FAI showed accuracy of 40.4% and 73.0%.
conclusions3D measurements were clearly more accurate than 2D measurements. Distinct cut-off values of AFR discriminated cam types from pincer types and identified pincer types in all cases. Cam and mixed types were not accurately recognized.
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