Haldar Anil, Bernasconi Alessio, Junaid Syed Ehtesham, Lee Kar Ho Brian, Welck Matthew, Saifuddin Asif
Foot and Ankle Unit, Royal National Orthopaedic Hospital, Stanmore, HA7 4LP, UK.
Department of Imaging, Royal National Orthopaedic Hospital, Stanmore, HA7 4LP, UK.
Skeletal Radiol. 2021 Jan;50(1):179-188. doi: 10.1007/s00256-020-03532-7. Epub 2020 Jul 22.
The authors compared measurements of hindfoot alignment on MR imaging with weight-bearing CT (WB-CT) to establish the degree of correlation. Forty-seven feet in 44 patients had weight-bearing CT and MRI studies performed on the same day.
Hindfoot alignment on MRI was assessed by two radiologists who calculated tibiocalcaneal angle (TCA) and calcaneofibular ligament angle (CFLA). On WB-CT, foot ankle offset (FAO), calcaneal offset (CO) and hindfoot angle (HA) were assessed by a senior Foot and Ankle Surgeon using dedicated software. Pearson correlation coefficient was used to evaluate the correlation between these measurements.
The study group comprised 27 males and 17 females with a mean age of 45 years (range 13-79 years). A statistically significant positive correlation was identified between TCA on MRI and all measurements of hindfoot alignment on WB-CT (p = 0.001-0.005). The CFLA on MRI only had significant correlation with CO on WB-CT (p = 0.03). A significant negative correlation was observed between both MRI parameters (p < 0.001).
A highly significant correlation between tibiocalcaneal angle on non-weight-bearing ankle MR imaging and hindfoot alignment measurements on weight-bearing CT was identified.
作者比较了磁共振成像（MR）与负重计算机断层扫描（WB-CT）对后足对线的测量结果，以确定两者的相关程度。44例患者的47只脚于同一天进行了负重CT和MRI检查。
两名放射科医生通过计算胫跟角（TCA）和跟腓韧带角（CFLA）评估MRI上的后足对线情况。在WB-CT上，一名资深足踝外科医生使用专用软件评估足踝偏移（FAO）、跟骨偏移（CO）和后足角（HA）。采用Pearson相关系数评估这些测量值之间的相关性。
研究组包括27名男性和17名女性，平均年龄45岁（范围13-79岁）。MRI上的TCA与WB-CT上所有后足对线测量值之间存在统计学显著正相关（p = 0.001-0.005）。MRI上的CFLA仅与WB-CT上的CO有显著相关性（p = 0.03）。两个MRI参数之间观察到显著负相关（p < 0.001）。
非负重踝关节MR成像上的胫跟角与负重CT上的后足对线测量值之间存在高度显著相关性。
