Figure 14b. (a) Anteroposterior radiograph obtained in a 44-year-old man shows stage IV avascular necrosis in the left hip and a normal right hip. (b, c) Coronal T2-weighted short inversion time inversion recovery MR images show stage I avascular necrosis in the right hip (arrow in b) as well as flattening of the left femoral head (c), a feature that helped confirm the diagnosis of stage IV avascular necrosis.