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[Principles of magnetic resonance angiography]
C Pharaboz1, B Falise, B Boyer
1Service de Radiologie, Hôpital Bégin, Saint-Mande.
Annales De Radiologie
|January 1, 1995
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.