MRI showing low signal foci in<unk> . Conventional gradient echo T2*-weighted image (left, TE=20ms), susceptibility weighted image (SWI) and SWI phase image (center and right, respectively, TE=40ms) at 1.5 Tesla.<unk>  can only be definitively diagnosed by a post-mortem autopsy. Biopsies can play a role in diagnosing probable cases. When no tissue is available for biopsy, the Boston Criteria are used to determine probable<unk>  cases from MRI or CT scan data. The Boston Criteria require evidence of multiple lobar or cortical hemorrhages to label a patient as probably having<unk> . Susceptibility weighted imaging has been proposed as a tool for identifying<unk> -related microhemorrhages. Imaging<unk>  can be presented with lobar intracerebral hemorrhage or microbleeds in the brain. The bleeding usually occurs on the surfaces of the brain in contrast with intracranial haemorrhage due to high blood pressure which occurs deep locations of the brain such as basal ganglia and pons. In lobar intracerebral bleed, computed tomography (CT) scan would show hyperdense haemorrhage area and hypodense odema around the haemorrhagic site. MRI sequence of gradient echo and Susceptibility weighted imaging(SWI) are useful in detecting microbleeds and deposition of iron on the brain cortex (cortical superficial siderosis). Other MRI indicators of<unk>  include white matter hyperintensities and cortical thinning.
Cerebral amyloid angiopathy
Cerebral atherosclerosis
Cerebral vasculitis
Hypertensive leukoencephalopathy
Diabetic angiopathy
Infectious intracranial aneurysm
Cerebral arteriovenous malformation
Moyamoya disease