title: [Principles of magnetic resonance angiography].
abstract: Magnetic resonance angiography is a modality of functional imaging which can only be interpreted on the basis of a good understanding of vascular physiology and the physical principles of image acquisition. Magnetic resonance angiography is based on flow-related "artefacts". The oldest method is based on renewal of the image by proton flow: the flight time effect. Dephasing of the protons travelling in magnetic field gradients results in phase-contrast angiography. These two methods of angiography each have respective advantages and disadvantages: they are not mutually exclusive, but complementary.
authors.affiliation: Service de Radiologie, Hôpital Bégin, Saint-Mande.
authors.forename: C
authors.initials: C
authors.lastname: Pharaboz
authors.forename: B
authors.initials: B
authors.lastname: Falise
authors.forename: B
authors.initials: B
authors.lastname: Boyer
authors.forename: P
authors.initials: P
authors.lastname: Dubayle
mesh_terms: D006439:Hemodynamics / Q000502:physiology*; D006801:Humans; D018810:Magnetic Resonance Angiography / Q000379:methods* / Q000639:trends
vernacular_title: Principes de l'angiographie par résonance magnétique.