Fig. 4

Axial non-enhanced T1fs a and b through the lower femurs in 19-year-old male patient with bilateral acute thigh pain show bilateral focal bone marrow hyperintensity involving the right more than the left lower femoral shaft; features of acute marrow infarcts. Axial OP c and post-contrast T1fs d through the right upper tibial shaft on the same patient show focal intra-medullary hypointense sequestrum (yellow arrow), focal cortical interruption (red arrow), and non-homogenous marrow enhancement (blue arrows); features are consistent with chronic osteomyelitis