Ultrasonographic Assessment of the Normal Femoral Articular Cartilage of the Knee Joint: Comparison with 3D MRI

Figure 2

Oblique transverse infrapatellar ultrasonographic image of the medial femoral condyle cartilage (a) was compared to the MR image in the MPR mode (c) using a matching imaging plane. Cartilage thickness was measured from both images (a, c). Condyle width was calculated from MR image (line in (c)) and visible condyle width from US (line in (a)). Sagittal view (d) from the level of the medial part of the patella and lateral part of the medial femoral condyle shows the imaging plane (line in (d)) corresponding to the MR image (c) and also corresponds to the US probe position (b) and US image (a). () represents the medial femoral cartilage, and (^#) represents the medial femoral condyle.