Journal of neuroimaging : official journal of the American Society of Neuroimaging
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Acetazolamide reactivity on 123 I-IMP SPECT is used to detect misery perfusion due to intracranial atherosclerosis. Noninvasive fractional flow assessed by signal intensity ratio (SIR) on time of flight-magnetic resonance angiography (TOF-MRA) might offer a feasible alternative to identify high-risk intracranial stenosis. ⋯ In patients with unilateral MCA stenosis, decreased SIR was correlated with misery perfusion, providing a simpler, widely available predictor of high-risk intracranial stenosis.