Velocity Distribution and Blood Flow Measurements Using Videodensitometric Methods

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Abstract
Digital cine-videodensitometry was employed for measuring blood velocity and blood flow in the descending aorta of human subjects. A very small, compact bolus of opaque dye was injected during different phases of the cardiac cycle, and flow through a portion of the aorta was analyzed. From the density vs time curves for different radial locations, the velocity distribution over the vessel cross-section was calculated. The velocity distribution obtained was nearly parabolic. Velocity and flow calculations were also made at different phases of the cardiac cycle.

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