TABLE 2.

Main hemodynamic indicators of impending cerebral infarction in moyamoya disease based on imaging modality^*

PET	SPECT	Xe-CT	Perfusion CT	DSC	ASL	Doppler US
↓ CBF	↓ CVR†	↓ CVR†	↓ CBF	↑ Tmax	↓ CBF	↓ CBF‡
↑ rOEF			↑ MTT	↑ MTT	↓ CBF†
			↑ CBV	PWI/DWI mismatch
			↓ CBF†

^*DWI = diffusion-weighted imaging.

^†Postvasodilatory challenge (addition of acetazolamide [Diamox] or CO₂).

^‡Estimated and compared to contralateral hemisphere.