EXPRESS: Diagnostic Accuracy of Noninvasive Translesional Pressure Ratio Based on Magnetic Resonance Imaging for Intracranial Atherosclerotic Stenosis: A Validation Study.
The anatomic stenosis severity of intracranial atherosclerotic stenosis (ICAS) does not reliably reflect lesion-specific hemodynamic impairment, and invasive pressure-wire assessment is technically challenging in the cerebral circulation. This study aimed to develop and validate MRI-derived pressure ratio (M-PR), a non...