Velocity distribution and blood flow measurements using videodensitometric methods.
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.
D015502:Absorptiometry, Photon / Q000379:methods; D001011:Aorta; D001027:Aortography / Q000379:methods; D001775:Blood Circulation; D001783:Blood Flow Velocity; D001794:Blood Pressure; D003201:Computers; D006801:Humans