Fig 2. A 46-year-old woman with fever for 2 days. A and B, Sagittal T1-weighted (TR/TE, 550/12) (A) and sagittal STIR (TR/TE/TI, 3130/65/160) (B) MR images show multiple intraosseous lesions of T1-weighted low signal intensity and STIR high signal intensity. Note some osseous lesions with a positive halo sign (arrows) and the absence of paraspinal or epidural inflammatory soft tissue. C, Sagittal T1-weighted (TR/TE, 550/12) follow-up MR image obtained 12 months later shows gradually reconstituted fatty marrow with a decrease in the number and extent of infectious foci. Note a peripheral rim of increased signal intensity (arrow) in a residual subchondral lesion of low signal intensity at the lower endplate of L5.