Fig 1.

Sagittal scout view sequences are used as localizers to select the anatomic levels for flow quantification. The acquisition planes are selected perpendicular to the presumed direction of the flow. Sections through the C2–C3 subarachnoid space level (a), fourth ventricle (b), and Sylvian aqueduct (c) are used for CSF. By varying the velocity encoding, the same cervical section level (a) is used to measure vascular flows in the left and right internal carotid arteries, vertebral arteries, and internal jugular veins.