|
FIG 4. Normal CSF flow cine-MR study. Sagittal midline phase-contrast MR imaging (2D-FISP 70/13/15°). Midsystolic image (left) shows caudal flow within foramen of Monro (arrow), aqueduct, and fourth ventricle. No CSF flow is seen in anterior of third ventricle. In middiastolic image (right), flow is reversed indicating bidirectional flow through ventricular system and subarachnoid spaces. By convention, caudal flow (systolic) is represented in black and cranial flow (diastolic) is represented in white
|