FIG 2. MR images of the brain, obtained approximately 2 weeks after completion of the 6-week antibiotic course, show interval near total resolution of edema and enhancement.

A, Axial nonenhanced T1-weighted MR image (500/11/2), obtained through the pons, shows no focal low-intensity area.

B, Axial contrast-enhanced T1-weighted MR image (500/11/2), obtained through the pons, shows that the ring-enhancing lesion has resolved.

C, Axial contrast-enhanced T1-weighted MR image (500/11/2), obtained through the midbrain, shows resolution of the ring-enhancing lesion adjacent to a thrombosed right posterior communicating artery aneurysm.

D, Coronal contrast-enhanced T1-weighted MR image (450/11/2), obtained through the brainstem, shows resolution of the ring-enhancing lesion adjacent to a thrombosed right posterior communicating artery aneurysm.