Stereotactic thalamic lesions studied by CT scanner

Summary The authors illustrate four cases of stereotactic CM-PF thalamotomy for pain syndromes and their evolutions seen on computer tomograms. The brain specimen from one is shown.The CT appearance of these lesions is composed of two relatively clear distinct parts: a discrete central core of increased attenuation, and an area of decreased attenuation surrounding the central core.In all CT slices the position of the lesion in relation to the ventricular landmarks shows good agreement with the Schaltenbrand Atlas demonstration of the thalamic nuclei.This work was supported by a grant from the Italian Research Council (C.N.R.).