Adult Transcranial Arterial Doppler Ultrasound for Arterial Stenosis Evaluation, Aneurysm, Arterio-Venous Malformation.

Preparation: None.

Evaluation of:

MCA-Middle Cerebral Artery (M1, M2 )

ACA-Anterior Cerebral Artery (A1, A2)

PCA-Posterior Cerebral Artery (P1, P2)

Intracranial Vertebral Artery (V4 segment)

BA-Basilar Artery.