Odisee University School, Brussels, Belgium.
Department of Radiology, UZ Brussel, Laarbeeklaan 101, 1090, Brussels, Belgium.
Surg Radiol Anat. 2023 Feb;45(2):207-213. doi: 10.1007/s00276-022-03069-5. Epub 2023 Jan 18.
(1) to assess the influence of medial or lateral imaging plane inclination on the measurement of sulcus angle, trochlear depth, and facet asymmetry on transverse cross-sectional images. (2) to assess the effect of measurement level (height) on these respective parameters.
Twenty dry femurs (9 left, 11 right) were imaged with CT. A 3D dataset was obtained from which axial images were reconstructed in the ideal plane without inclination as well as with 8° of medial and lateral inclination. Sulcus angle, trochlear depth, and facet asymmetry were measured on the 3 image sets. In addition, the measurements were performed at 5 mm and 10 mm from the superior margin of the medial trochlear facet. Statistical analysis consisted of the Wilcoxon test and calculation of measurement variation.
There were no statistically significant differences between the indicated measurements on the reference set compared to medial or lateral inclination. All measurements were significantly different depending on measurement height.
Medial or lateral inclination in the transverse imaging plane of 8° does not influence the values of typical parameters used for the assessment of trochlear dysplasia. The measurement height has a significant influence, and a consensus should be found as to which is the optimal measurement height.
（1）评估在横断面上，内侧或外侧成像平面倾斜对测量滑车切迹角、滑车深度和滑车关节面不对称的影响。（2）评估测量水平（高度）对这些参数的影响。
对 20 个干股骨（9 个左侧，11 个右侧）进行 CT 成像。获得一个 3D 数据集，从该数据集中重建无倾斜的理想平面以及 8°内侧和外侧倾斜的轴向图像。在 3 组图像上测量滑车切迹角、滑车深度和滑车关节面不对称。此外，还在滑车内侧关节面上方 5mm 和 10mm 处进行了测量。统计分析包括 Wilcoxon 检验和测量变异的计算。
与内侧或外侧倾斜相比，参考组的指示测量值之间没有统计学上的显著差异。所有测量值都因测量高度的不同而显著不同。
在横断面上，内侧或外侧倾斜 8°不会影响用于评估滑车发育不良的典型参数的值。测量高度有显著影响，应该就最佳测量高度达成共识。
