Oksendahl Heidi L, Gomez Nigel, Thomas Colleen S, Badger Gary D, Hulstyn Michael J, Fadale Paul D, Fleming Braden C
Department of Orthopaedics, Warren Alpert Medical School of Brown University, Providence, RI, USA.
J Knee Surg. 2009 Jul;22(3):205-12. doi: 10.1055/s-0030-1247750.
This study aimed to evaluate sources of variability when the metatarsal-phalangeal (MTP) semiflexed radiographic technique is used to measure the tibiofemoral joint space width in the medial and lateral compartments of the knee. Three independent digital MTP radiographs were obtained from both knees of 9 participants. The joint space widths of both compartments of each knee were measured 3 times by 2 independent examiners. Intraclass correlation coefficients were high between repeated radiographs, between examiners, and within examiners (range, 0.91-0.98). These 3 error components accounted for 9% and 14% of the total variance for the medial and lateral compartments, respectively. The estimated SDs across radiographs for the medial and lateral compartments were 0.093 mm and 0.155 mm. The digital radiographic technique based on the MTP view is a simple and reliable technique for measuring the joint space width that can be readily used to track longitudinal changes in cartilage thickness after knee joint surgery.
本研究旨在评估使用跖趾（MTP）半屈曲位X线摄影技术测量膝关节内侧和外侧胫股关节间隙宽度时的变异性来源。从9名参与者的双膝关节获取了3张独立的数字化MTP X线片。由2名独立检查者对每个膝关节两个间室的关节间隙宽度进行3次测量。重复X线片之间、检查者之间以及检查者自身内部的组内相关系数均较高（范围为0.91 - 0.98）。这3个误差成分分别占内侧和外侧间室总方差的9%和14%。内侧和外侧间室X线片的估计标准差分别为0.093 mm和0.155 mm。基于MTP位的数字化X线摄影技术是一种简单可靠的测量关节间隙宽度的技术，可用于追踪膝关节手术后软骨厚度的纵向变化。
