[Magnetic resonance in the clinical and therapeutic follow-up of multiple sclerosis].

Magnetic resonance is the most sensitive para-clinical method available for the diagnosis of multiple sclerosis since it shows changes in 95% of the patients with clinically definite multiple sclerosis. However, little correlation has been found, in different studies, between the parameters of magnetic resonance and the degree of neurological disability. The development and gradual application of new techniques of magnetic resonance, which permit specific detection of the lesions with the greatest degree of nerve dysfunction, permits improvement in the use of this technique for study of the natural history of the disease and thus to monitor patients given new treatments.