[3-dimensional transcranial dopplerometry of the cerebral vessels. Methods and normal values].

Using a Trans-scan 3-D (EME) apparatus and a 2 MHz pulsed probe the authors examined from a temporal approach 30 clinically healthy subjects with normal biochemical tests, and assessed normal values of flow parameters of the population for the median cerebral artery, the anterior cerebral artery, the posterior cerebral artery, the terminal portion of the internal carotid artery and basilar artery which was examined via the foramen occipitale magnum. The normal flow rate recorded does not differ significantly from data reported in the literature. The method can be used for the detection of intracranial vascular lesions. The examination does not involve risk for the patient and provides accurate information on the blood flow in the circle of Willis.