Fig. 15.

Severe synovial thickening (grade 2) and severe joint enhancement (grade 2) on sagittal oblique images in a 11-year-old girl. a There is moderate flattening of the condyle (*) and mild flattening of the temporal bone (arrow) on T1-weighted image (TR/TE 300/4.2 ms, flip angle 80°). b Thickened synovium (arrow) is shown in the anterior inferior portion of the joint space as intermediate signal intensity tissue exceeding 2-mm width on fat saturated T2-weighted fast spin echo (TR/TE 5,400/77 ms). c There is strong enhancement of the thickened synovium (arrow) but also the entire lower joint space and the posterior half of the upper joint space are shown as high signal intensity on postcontrast fat-saturated T1-weighted image (TR/TE 670/10 ms). T1 T1-weighted, T1 fs Gd contrast-enhanced fat saturated T1-weighted, T2 fs fat saturated T2-weighted