Figure 4.

Acute osteomyelitis of the hip. A: Coronal fast spin echo inversion recovery image shows T2-hyperintense marrow edema in the left femoral metaphysis (solid arrow) with a small round very intense focus of T2 signal (arrowhead) which is consistent with an intraosseous abscess. Surrounding soft tissue edema (dashed arrow) is also noted; B: Coronal T1-weighted post-contrast image in the same patient shows enhancement in the metaphyseal bone marrow (solid long arrow), peripheral enhancement of the abscess (arrowhead), and surrounding soft tissue enhancement (dashed arrow). Note enhancement of the left femoral head (solid short arrow) which indicates adequate perfusion.