Analysing blood flow with a sonagraph.
D000328:Adult; D000368:Aged; D001783:Blood Flow Velocity; D002339:Carotid Arteries; D005260:Female; D006801:Humans; D002537:Intracranial Arteriosclerosis / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D014465:Ultrasonics