Fig. 3

The tibiofibular clear space was measured in the 2-D axial and 3-D images of CT scans at same level of plane Y (red arrow). a TCS-A = anterior tibiofibular clear space (line ab); TCS-P = posterior tibiofibular clear space (line cd). b TCS-A (line AB) and TCS-P (line CD) in 3-D images were measured