title: MR angiography of the central nervous system. Basic flow phenomena.
abstract: To properly understand MR angiography and its artifacts, one needs to be firmly grounded in the basic physics of MR flow. Concepts such as "flow-related enhancement" are crucial to a proper understanding of time-of-flight MR angiography. Phase contrast MR angiography draws from the same principles used to explain "even echo rephasing." This article not only provides a physical basis for MR angiography but also explains the flow phenomena observed on routine MR images.
authors.affiliation: Magnetic Resonance Imaging Center, Long Beach Memorial Medical Center, California, USA.
authors.forename: W G
authors.initials: WG
authors.lastname: Bradley
mesh_terms: D016477:Artifacts; D002490:Central Nervous System / Q000098:blood supply; D003971:Diastole; D006801:Humans; D018810:Magnetic Resonance Angiography / Q000379:methods*; D011673:Pulsatile Flow; D012039:Regional Blood Flow