 Magnetic resonance short-TI inversion recovery image (coronal image)Both hip joints reveal hyperintensities in the femoral heads, which are more severe on the left, and femoral head collapse accompanied by increased acetabular femoral joint space, suggestive of grade III avascular necrosis on the left side (big arrow) and grade I avascular necrosis (small arrow) on the right side. A mild amount of fluid is noted in both joints.