PURPOSE: To retrospectively assess the diagnostic sensitivity of 45° Dunn view and cross-table lateral radiographs for the assessment of cam deformity by comparison with radial MRI. MATERIALS AND METHODS: 60 cases with radiographs (38 a-p and 45° Dunn views, 22 a-p and cross-table lateral views) and radial MRI were assessed. Alpha angle measurements were obtained both for radiographs and radial MRI. Statistics included frequency analysis, bivariate linear correlation analyses of MRI and radiograph measurements and cross-table analyses testing for the sensitivity and specificity of radiographs for the detection of an alpha angle larger than 55°. RESULTS: 53.3% had the maximum alpha angle in the superior-anterior aspect of the femoral head-neck junction. Cam deformity was found in 45/60 cases (75%) in radial MRI. Pearson correlation demonstrated the Dunn view was most accurate for the superior-anterior aspect (.772, P<.001). The cross-table lateral views were best suited for the anterior-superior aspect (.511, P<.05). The sensitivity for cam deformity in the Dunn view was 96.4% vs. 70.6% in the cross-table lateral view. CONCLUSION: The 45° Dunn view can improve the first line of impingement diagnostics. Radial MRI however remains indispensable for pre-operative planning and the evaluation of symptomatic cases without obvious deformity.
PURPOSE: To retrospectively assess the diagnostic sensitivity of 45° Dunn view and cross-table lateral radiographs for the assessment of camdeformity by comparison with radial MRI. MATERIALS AND METHODS: 60 cases with radiographs (38 a-p and 45° Dunn views, 22 a-p and cross-table lateral views) and radial MRI were assessed. Alpha angle measurements were obtained both for radiographs and radial MRI. Statistics included frequency analysis, bivariate linear correlation analyses of MRI and radiograph measurements and cross-table analyses testing for the sensitivity and specificity of radiographs for the detection of an alpha angle larger than 55°. RESULTS: 53.3% had the maximum alpha angle in the superior-anterior aspect of the femoral head-neck junction. Camdeformity was found in 45/60 cases (75%) in radial MRI. Pearson correlation demonstrated the Dunn view was most accurate for the superior-anterior aspect (.772, P<.001). The cross-table lateral views were best suited for the anterior-superior aspect (.511, P<.05). The sensitivity for camdeformity in the Dunn view was 96.4% vs. 70.6% in the cross-table lateral view. CONCLUSION: The 45° Dunn view can improve the first line of impingement diagnostics. Radial MRI however remains indispensable for pre-operative planning and the evaluation of symptomatic cases without obvious deformity.
Authors: Alberto Aliprandi; Francesco Di Pietto; Paolo Minafra; Marcello Zappia; Simona Pozza; Luca Maria Sconfienza Journal: Radiol Med Date: 2013-11-26 Impact factor: 3.469
Authors: Miguel O Castro; Vasco V Mascarenhas; P Diana Afonso; Paulo Rego; Florian Schmaranzer; Reto Sutter; Ara Kassarjian; Luca Sconfienza; Michael Dienst; Olufemi R Ayeni; Paul E Beaulé; Pedro Dantas; Radhesh Lalam; Marc-André Weber; Filip M Vanhoenacker; Tobias Johannes Dietrich; Lennart Jans; Philip Robinson; Apostolos H Karantanas; Iwona Sudoł-Szopińska; Suzanne Anderson; Iris Noebauer-Huhmann; Oliver Marin-Peña; Diego Collado; Marc Tey-Pons; Ehrenfried Schmaranzer; Mario Padron; Josef Kramer; Patrick O Zingg; Michel De Maeseneer; Eva Llopis Journal: Eur Radiol Date: 2021-01-07 Impact factor: 5.315
Authors: Michael T Milone; Asheesh Bedi; Lazaros Poultsides; Erin Magennis; J W Thomas Byrd; Christopher M Larson; Bryan T Kelly Journal: Clin Orthop Relat Res Date: 2013-08 Impact factor: 4.176
Authors: Michael A Samaan; Alan L Zhang; Tijana Popovic; Valentina Pedoia; Sharmila Majumdar; Richard B Souza Journal: J Biomech Date: 2018-12-23 Impact factor: 2.712
Authors: Vasco V Mascarenhas; Paulo Rego; Pedro Dantas; Augusto Gaspar; Francisco Soldado; José G Consciência Journal: Eur Radiol Date: 2016-08-30 Impact factor: 5.315
Authors: Michael A Samaan; Alan L Zhang; Matthew C Gallo; Benedikt J Schwaiger; Thomas M Link; Richard B Souza; Sharmila Majumdar Journal: J Magn Reson Imaging Date: 2016-05-18 Impact factor: 4.813