Findings:
Subacute stage subarachnoid hemorrhage is seen in the right central and praecentral sulci as hyperintense on T1 images, blooming artifact on SWI images and hyperintense on filtered phase images.
Additionally, minimal amount of subacute subdural haemorrhage is seen along the falx cerebri on the right.
A posthaemorrhagic area of encephalomalacia is seen in the right parietal lobe.
On the SWI images innumerable foci of lobar/cortical blooming artefact in keeping with blood products are present in the supratentorial brain. Also, diffuse subarachnoid haemosiderosis is seen in the both cerebral hemispheres, more prominent on the right. No involvement of the basal ganglia, the brainstem or the cerebellum.
On the DWI a tiny focus of diffusion restriction is seen in the right middle frontal gyrus with correlating flair hyperintensity, suspicious of a tiny, embolic infarct.
Moderate periventricular and deep white matter FLAIR hyperintensity, in keeping with chronic small vessel ischemic change.
Mild involutional changes are seen in the brain parenchyma in the form of prominent cortical sulci and widened ventricles. There is no mass or midline shift.
The pituitary gland is normal.
The orbits, paranasal sinuses and mastoid air cells are clear.
No bony abnormality is seen. The craniocervical junction is normal.
Conclusion:
Possible, tiny subacute embolic infarct in the right MCA territory in the right middle frontal gyrus.
Extensive lobar microhemorrhages as well as subarachnoid haemosiderosis in both cerebral hemispheres, most likely in keeping with cerebral amyloid angiopathy with subacute subarachnoid haemorrhage in the right precentral and central regions. No mass effect or midline shift. Further surveillance is advised.
Post haemorrhagic area of encephalomalacia in the right parietal lobe.