Department of Imaging and Interventional Radiology and Department of Orthopedics and Traumatology, the Chinese University of Hong Kong, Prince of Wales Hospital, 30-32 Ngan Shing St, Shatin, NT, Hong Kong SAR, China.
Radiology. 2013 May;267(2):496-502. doi: 10.1148/radiol.12121681. Epub 2013 Jan 17.
To investigate the agreement among magnetic resonance (MR) imaging, computed tomography (CT), and arthroscopy in the measurement of glenoid bone loss.
This study was approved by the institutional ethics committee. One hundred seventy-six patients (158 male and 18 female patients; mean age, 26.8 years ± 12.3) with anterior shoulder dislocation underwent both shoulder MR imaging and CT examination. Anterior straight line length, glenoid width, and best-fit bone loss were measured with MR imaging and CT. Sixty-five patients also underwent arthroscopy, which was used as the standard of reference. Assessment of glenoid bone loss at MR imaging was compared with that at CT and arthroscopy. Inter- and intrareader reproducibility of MR imaging-derived measurements of glenoid bone loss was evaluated.
There was excellent correlation between CT and MR imaging with regard to anterior straight line length (r = 0.97, P < .0001), glenoid width (r = 0.95, P < .0001), and severity of glenoid bone loss-particularly with use of best-fit circle width (r = 0.83, P < .0001) rather than best-fit circle area (r = 0.82, P < .0001). In the assessment of glenoid bone loss, the correlation between CT and arthroscopy (r = 0.91, P < .0001) was marginally better than that between MR imaging and arthroscopy (r = 0.84, P < .0001). The inter- and intrareader correlations of MR imaging-derived measurements of glenoid bone loss were excellent (R = 0.90-0.95).
MR imaging assessment of glenoid bone loss, particularly with use of glenoid width, is almost as accurate as CT assessment.
探讨磁共振成像（MR 成像）、计算机断层扫描（CT）和关节镜在测量肩盂骨丢失方面的一致性。
本研究经机构伦理委员会批准。176 例（男 158 例，女 18 例；平均年龄 26.8 岁±12.3 岁）肩关节前脱位患者均行肩部 MR 成像和 CT 检查。采用 MR 成像和 CT 测量前直线长度、肩盂宽度和最佳拟合骨丢失。65 例患者还接受了关节镜检查，将其作为参考标准。比较了 MR 成像和 CT 对肩盂骨丢失的评估，并评估了 MR 成像测量肩盂骨丢失的观察者内和观察者间可重复性。
CT 与 MR 成像在测量前直线长度（r = 0.97，P <.0001）、肩盂宽度（r = 0.95，P <.0001）和肩盂骨丢失严重程度方面具有极好的相关性，尤其是使用最佳拟合圆宽度（r = 0.83，P <.0001）而非最佳拟合圆面积（r = 0.82，P <.0001）。在评估肩盂骨丢失时，CT 与关节镜检查（r = 0.91，P <.0001）的相关性略优于 MR 成像与关节镜检查（r = 0.84，P <.0001）。MR 成像测量肩盂骨丢失的观察者内和观察者间相关性均极好（R = 0.90-0.95）。
MR 成像评估肩盂骨丢失，尤其是使用肩盂宽度，几乎与 CT 评估一样准确。
