title: Projective imaging of pulsatile flow with magnetic resonance.
abstract: Noninvasive angiography with magnetic resonance is demonstrated. Signal arising in all structures except vessels that carry pulsatile flow is eliminated by means of velocity-dependent phase contrast, electrocardiographic gating, and image subtraction. Background structures become in effect transparent, enabling the three-dimensional vascular tree to be imaged by projection to a two-dimensional image plane. Image acquisition and processing are accomplished with entirely conventional two-dimensional Fourier transform magnetic resonance imaging techniques. When imaged at 0.6 tesla, vessels 1 to 2 millimeters in diameter are routinely detected in a 50-centimeter field of view with data acquisition times less than 15 minutes. Studies of normal and pathologic anatomy are illustrated in human subjects.
mesh_terms: D000792:Angiography / Q000295:instrumentation*; D001161:Arteriosclerosis / Q000175:diagnosis; D003971:Diastole; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D013599:Systole