Fig. 5.

(a) Axial reformatted image obtained after spiral CTA of the knee. Contrast agent filling a full sized cartilage defect of the femur (white arrow) and the patellar (white star). MRI images in axial plane depict cartilage defects of the femur (white arrow) and retropatellar region (white star). In T1-weighted turbo spin echo sequence the defect zone is displayed as a hypointense area (b). Proton-density weighted (PDW) sequence shows the defect of cartilage tissue as a well defined hyperintense area (c).