Department of Diagnostic and Interventional Radiology, University Hospital Tübingen, Eberhard Karls University Tübingen, 72076, Tübingen, Germany.
Department of Traumatology and Reconstructive Surgery, BG Trauma Center Tübingen, Eberhard Karls University of Tübingen, Schnarrenbergstrasse 95, 72076, Tübingen, Germany.
Knee Surg Sports Traumatol Arthrosc. 2023 Nov;31(11):4903-4909. doi: 10.1007/s00167-023-07533-6. Epub 2023 Aug 17.
The aim of this study was to compare MRI-based torsion measurements of the lower limb to a well-established CT-based assessment in a prospective inter- and intraindividual approach.
A total of 26 patients (age 28.8 years ± 11.0) were enrolled beginning in January 2021 until August 2022. Inclusion criteria were the clinical indication for torsion measurement of the lower limb. CT and MRI imaging were performed with a standard operating procedure, to ensure that all patients were examined in a standardized position. The examinations were planned on a coronal scout view based on prominent anatomical landmarks. Femoral and tibial torsion were measured individually. Torsion measurements were analysed twice: immediately after examination and after 3 weeks. Subsequently, intra-rater and parallel test reliability was calculated accordingly.
High significant results for CT and MRI measurements for both tibia (MRI: r = 0.961; p ≤ 0.001; CT: r = 0.963; p ≤ 0.001) and femur (MRI: r = 0.980; p ≤ 0.001; CT: r = 0.979; p ≤ 0.001) were obtained by calculated intra-rater reliability, showing that measurements were highly consistent for MRI and CT, respectively. Parallel test reliability for time point 1 as well as time point 2 was also highly significant and ranged from r = 0.947 to r = 0.972 (all with p ≤ 0.001, respectively) for both tibia and femur, showing a high concordance between the two measurements.
Measurement of tibial as well as femoral torsion was comparable for CT and MRI measurement. Therefore, this study supports MRI measurement as an equivalent alternative for CT measurement concerning torsional malalignment to reduce exposure to radiation.
Level II.
本研究旨在通过前瞻性的个体内和个体间比较，比较基于 MRI 的下肢扭转测量与成熟的基于 CT 的评估。
2021 年 1 月至 2022 年 8 月期间共纳入 26 名患者（年龄 28.8±11.0 岁）。纳入标准为下肢扭转测量的临床指征。CT 和 MRI 成像采用标准操作程序进行，以确保所有患者均在标准化体位下进行检查。检查计划基于冠状位扫描视图，以突出的解剖学标志为基础。单独测量股骨和胫骨扭转。扭转测量分别进行两次分析：检查后立即和 3 周后。随后，相应地计算了内部测试者和并行测试的可靠性。
CT 和 MRI 测量的胫骨（MRI：r=0.961；p≤0.001；CT：r=0.963；p≤0.001）和股骨（MRI：r=0.980；p≤0.001；CT：r=0.979；p≤0.001）的结果均具有高度显著性，表明 MRI 和 CT 的测量高度一致。第 1 时间点和第 2 时间点的并行测试可靠性也具有高度显著性，胫骨和股骨的 r 值范围分别为 r=0.947 至 r=0.972（均为 p≤0.001），表明两种测量之间具有高度一致性。
CT 和 MRI 测量的胫骨和股骨扭转测量具有可比性。因此，本研究支持 MRI 测量作为 CT 测量的等效替代方法，用于减少辐射暴露导致的扭转不良。
2 级。
