Department of Surgical Sciences, University of Parma, Parma, Italy.
Arthroscopy. 2013 Mar;29(3):471-7. doi: 10.1016/j.arthro.2012.10.017. Epub 2013 Jan 29.
To determine if the measurement of the glenoid surface by computed tomography (CT) with curved multiplanar reconstructions (cMPR) in a cadaveric model is an accurate and reproducible technique.
Ten dried cadaveric glenoid specimens were used. Two glenoids were subsequently modified mechanically to induce a bony Bankart lesion. Three skilled musculoskeletal radiologists performed cMPR on computed tomographic images of the glenoids; one of the radiologists repeated the same measurements after 3 months. Two of the 3 operators used the traditional "flat" MPR method as a control. An optical scanning system using a high-precision laser (CAM2 Laser Line Probe, Faro Technologies, Lake Mary, FL) was used as a reference. From the data obtained, an evaluation was performed for variability, degree of interoperator and intraoperator agreement, and degree of agreement between the laser and CT methods. Statistical analysis was performed with PASW-SPSS, version 18 (IBM, Armonk, NY) and R, version 2.12 statistical package.
The average difference between the 2 sets of cMPR measurements was approximately 1%, and maximum and minimum values were between 6.02% and -0.29%. The flat MPR method showed mean differences of 16% when compared with laser scanning, and maximum and minimum values were 31% and 8%, respectively. The interoperator variability for the "curved" method was limited and showed a coefficient of variation ranging from 0.78% to 2.82%. The Cronbach alpha coefficient for this set of measurements was alpha = 0.995. There was little intraoperator variability with the coefficient of variation between 0% and 2% and an intraclass correlation coefficient of 0.989.
The use of cMPR computed tomographic imaging of the glenoid in a cadaveric model was found to be significantly more accurate than conventional MPR (flat MPR). Moreover, cMPR CT is a reproducible technique providing reliable information despite the relevant variable anatomy of the glenoid surface. This technique could reasonably also be used in a clinical setting as a more accurate noninvasive method. CLINICAL OF RELEVANCE: This technique could also reasonably be used in a clinical setting as a more accurate noninvasive method.
确定在尸体模型中使用计算机断层扫描（CT）进行曲面多平面重建（cMPR）测量是否是一种准确且可重复的技术。
使用了 10 个干燥的肩胛骨标本。随后对其中两个肩胛骨进行机械修改以诱导骨性 Bankart 损伤。三位熟练的肌肉骨骼放射科医生对肩胛骨的 CT 图像进行了 cMPR 检查；其中一位放射科医生在 3 个月后重复了相同的测量。其中两位操作人员中的两位使用传统的“平面”MPR 方法作为对照。使用高精度激光（Faro Technologies，Lake Mary，FL 的 CAM2 Laser Line Probe）的光学扫描系统作为参考。根据获得的数据，对可变性、操作员间和操作员内的一致性程度以及激光和 CT 方法之间的一致性程度进行评估。使用 PASW-SPSS 版本 18（IBM，Armonk，NY）和 R 版本 2.12 统计软件包进行统计分析。
两组 cMPR 测量值之间的平均差异约为 1%，最大值和最小值分别为 6.02%和-0.29%。与激光扫描相比，平面 MPR 方法的平均差异为 16%，最大值和最小值分别为 31%和 8%。“曲面”方法的操作员间可变性有限，变异系数范围为 0.78%至 2.82%。这组测量的 Cronbach 阿尔法系数为 alpha = 0.995。操作员内的可变性很小，变异系数在 0%至 2%之间，组内相关系数为 0.989。
在尸体模型中使用肩胛骨的 cMPR CT 成像被发现明显比传统 MPR（平面 MPR）更准确。此外，尽管肩胛骨表面的解剖结构存在相关差异，cMPR CT 仍是一种可重复的技术，可提供可靠的信息。该技术也可以合理地在临床环境中用作更准确的非侵入性方法。
该技术也可以合理地在临床环境中用作更准确的非侵入性方法。
