Mainly right-sided areas of cerebral white matter edema, mostly confluent with some cortical and basal ganglia involvement. Few foci in the left hemisphere.
After contrast administration, multiple nodular, partially confluent areas of vivid contrast enhancement are seen with cortical/subcortical and white matter angiocentric distribution. Most of the enhancing lesions show some mild peripheral diffusion restriction.
Single foci of microhemorrhage are seen on SWI.
Impression:
Multiple foci and regions of enhancing lesions resembling granulomas and aseptic emboli with edema and some degree of peripheral diffusion restriction, most probably due to endovascular treatment.