title: Angiographic methods for blood flow measurements.
abstract: Radiopaque angiographic contrast agents are being used as indicators for the measurement of blood flow; the basic assumption for these measurements being that both blood and indicator flow nearly at the same rate. Indicators are injected into the circulation and recorded immediately by X-ray filming or video techniques; density changes at selected points along the recorded vessel are detected; dilution curves are plotted and blood flow is calculated graphically or by computer.
mesh_terms: D000792:Angiography / Q000379:methods*; D001158:Arteries / Q000502:physiology; D001775:Blood Circulation; D001783:Blood Flow Velocity; D003720:Densitometry; D055590:Electromagnetic Phenomena; D006801:Humans; D008433:Mathematics; D008954:Models, Biological; D012039:Regional Blood Flow; D014465:Ultrasonics