Blood Flow Measurement Using Quantitative Magnetic Resonance Angiography and Duplex Sonography

The aim of the study is to assess the correlation of blood flow measurement in cervical and intracranial arteries between quantitative magnetic resonance angiography (qMRA) and duplex sonography (DS) and inter-/intra-investigators reliability of both methods in common clinical practice. A total of 21 subjects indicated to qMRA or DS for suspicion of cervical or intracranial vascular pathology will be included. All patients will undergo qMRA and DS of the cervical and intracranial arteries with measurement of blood flow in bilateral common carotid artery (CCA), internal carotid artery in proximal part distally to carotid bulb (ICA) and in distal carotid siphon (ICA-siphon), external carotid artery (ECA), vertebral artery in V2 (V2-VA) and V4 (V4-VA) segments, middle cerebral artery (MCA), anterior cerebral artery in pre-communicant (ACA1) and post-communicant (ACA2) part, posterior cerebral artery in pre-communicant (PCA1) and post-communicant (PCA2) part and basilar artery (BA) the cerebral artery. Correlations between measurements will be evaluated using Spearman's correlation coefficient or kappa coefficient and inter-class correlation coefficient (ICC).