[Normal results].
THE TECHNIQUE: Today, magnetic resonance imaging (MRI) is the exploration of choice for a number of central nervous system disorders. This technique, which does not use ionising rays, examines the encephalus in all its dimensions. Various sequences are used to study the cerebral parenchyma: specific sequences in T1, with or without injection of a contrast product, specific sequence in T2, and FLAIR sequence. THE RESULTS OBTAINED: The diffusion and perfusion imaging respectively reveal the movement of the water molecules and the cerebral microcirculation. Visualisation of the arteries and veins is non-invasive with magnetic resonance angiographical techniques. Study of the chemical composition of tissues (magnetic resonance spectroscopy) and of cerebral activation (functional activation imaging) will not be addressed.
Meder
J F
JF
Département d'Imagerie Morphologique et Fonctionnelle, Centre Hospitalier Sainte-Anne, 1 rue Cabanis, Paris. meder@chsa.broca.inserm.fr
Brami-Zylberberg
F
F
Oppenheim
C
C
Méary
E
E
Martinez-Lozano
F
F
Delvat
D
D
Frédy
D
D
D001158:Arteries / Q000473:pathology; D001921:Brain / Q000098:blood supply / Q000473:pathology*; D006801:Humans; D007089:Image Enhancement; D018810:Magnetic Resonance Angiography; D008279:Magnetic Resonance Imaging; D008833:Microcirculation / Q000473:pathology; D012016:Reference Values; D014680:Veins / Q000473:pathology