Department of Orthopaedics, Kantonsspital Baselland, Liestal, Switzerland.
Department of Orthopaedics, University Hospital Basel, Basel, Switzerland.
Foot Ankle Int. 2022 Jan;43(1):91-95. doi: 10.1177/10711007211034522. Epub 2021 Aug 5.
A reliable assessment of the ankle using weightbearing radiography remains challenging. Semiautomated 3-dimensional (3D) measurements derived from weightbearing computed tomography (WBCT) scans may provide a more reliable approach.
Thirty healthy individuals without any foot and ankle disorder were analyzed. We assessed 6 widely used ankle parameters (4 angles and 2 distances) using either semiautomated 3D (based on WBCT scans) or traditional 2-dimensional (2D; based on conventional radiographs) measurements. The reliability and discrepancy between both techniques were compared using intraclass correlation coefficients and the Bland-Altman method.
Five of 6 variables showed a lower reliability when derived from 2D measurements. The mean of 3 variables differed between the techniques: the 3D technique assessed that the talonavicular coverage angle was 18.9 degrees higher, the axial talocalcaneal angle was 5.5 degrees higher, and the talocalcaneal overlap was 3.7 mm lower when compared with 2D measurements.
Semiautomated 3D measurements derived from WBCT scans provide more reliable information on ankle alignment compared with 2D measurements based on weightbearing radiographs. Future studies may show to what extent these parameters could contribute to current diagnostic algorithms and treatment concepts.
Not applicable.
使用负重位 X 线摄影来可靠地评估踝关节仍然具有挑战性。来自负重位计算机断层扫描（WBCT）扫描的半自动 3 维（3D）测量可能提供更可靠的方法。
分析了 30 名无足部和踝关节疾病的健康个体。我们使用半自动 3D（基于 WBCT 扫描）或传统 2 维（基于常规 X 线片）测量来评估 6 个常用的踝关节参数（4 个角度和 2 个距离）。使用组内相关系数和 Bland-Altman 方法比较两种技术的可靠性和差异。
5 个变量中的 6 个在二维测量中显示出较低的可靠性。有 3 个变量的平均值在两种技术之间存在差异：与二维测量相比，3D 技术评估距下关节覆盖角高 18.9 度，轴向跟距角高 5.5 度，跟距骨重叠低 3.7 毫米。
与基于负重 X 线片的二维测量相比，来自 WBCT 扫描的半自动 3D 测量可提供更可靠的踝关节对线信息。未来的研究可能会表明这些参数在多大程度上可以为当前的诊断算法和治疗概念做出贡献。
不适用。
