Table 1 CAA-related abnormal imaging findings
Disease | Imaging findings | Recommended neuroimaging modality |
|---|---|---|
ICH | Haematoma with distinctive cortical-subcortical distribution generally sparing the deep white matter and basal ganglia and brainstem | CT and MRI MRI; additional depiction of chronic haemosiderin depositions and MBs |
MBs | Small round hypointense foci on MRI | MRI, especially susceptibility-weighted image |
SAH | Supratentorial sulcal high attenuation/intensity, most frequently depicted around the precentral gyrus | CT and MRI MRI; additional depiction of MB and SS |
SS | Hypointensity along the supratentorial cerebral sulcus on MRI | MRI, especially susceptibility-weighted image |
CAA-related inflammation | Large confluent asymmetric abnormal attenuation/intensity mainly in the subcortical WM | CT and MRI MRI; additional evaluation of vasogenic oedema and other findings such as MB and SS |
Leukoaraiosis | Low attenuation on CT and high intensity on FLAIR and T2W MRI mainly in the deep WM with sparing of the subcortical U fibres | CT and MRI MRI; depiction of leukoaraiosis clearer than CT |
Microinfarction | Small ovoid or round high intensity of the subcortical and cortex on diffusion-weighted image | MRI, especially diffusion-weighted image |