Fig. 1From: Characterization of cardiac- and respiratory-driven cerebrospinal fluid motion based on asynchronous phase-contrast magnetic resonance imaging in volunteersA T 2-weighted image (a) of a healthy subject with 2 ROIs (red rectangles) placed in the foramen magnum (#1) and the Sylvian aqueduct (#2). The temporal changes of the total velocity wave of the CSF, and separated the cardiac and respiratory velocity components at ROI #1 are shown in (b)Back to article page