Transverse-section radionuclide scanning in cisternography.

By applying the technique of transverse-section radionuclide scanning to cisternography, the structure and relationships of the basal cisterns and other subarachnoid spaces of the brain can be visualized more clearly and with more detail than is possible with routine imaging techniques. The ability of this method to separate overlapping areas of radioactivity ensures improved definition of space-occupying processes within the basal cisterns. In the evaluation by cisternography of patients with hydrocephalus and dementia, the transverse-section images clearly separated various normal and abnormal patterns, whereas the routine cisternogram images were equivocal.