3D imaging for hindfoot alignment assessment: a comparative study between non-weight-bearing MRI and weight-bearing CT
- Resource Type
- Original Paper
- Authors
- Haldar, Anil; Bernasconi, Alessio; Junaid, Syed Ehtesham; Lee, Kar Ho Brian; Welck, Matthew; Saifuddin, Asif
- Source
- Skeletal Radiology: Journal of the International Skeletal Society A Journal of Radiology, Pathology and Orthopedics. 50(1):179-188
- Subject
- Hindfoot
Malalignment
MRI
Tibiocalcaneal angle
Weight-bearing CT
Foot ankle offset
- Language
- English
- ISSN
- 0364-2348
1432-2161
Purpose: 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.Materials and methods: 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.Results: 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).Conclusion: A highly significant correlation between tibiocalcaneal angle on non-weight-bearing ankle MR imaging and hindfoot alignment measurements on weight-bearing CT was identified.