[Transcranial Doppler sonography].

Transcranial Doppler sonography measures blood circulation rate in the basal sections of the cerebral arteries. The theoretic basis of the method is outlined, localisation and standard values are presented for the individual vessels are set out. Vascular constriction, angiospasms, and arteriovenous malformations may affect the blood circulation rate, and can be detected by use of this method. Further indications exist before, during, and after surgery, and in the case of excessive intracranial pressure. Functional angiograms of the basal cerebral vessels can be produced by means of three dimensional transcranial Doppler sonography.