The Emperor has no clothes: velocity, flow, and the use of TCD.
Giller
Cole A
CA
D001783:Blood Flow Velocity; D002560:Cerebrovascular Circulation / Q000502:physiology*; D006439:Hemodynamics / Q000502:physiology; D006801:Humans; D020768:Middle Cerebral Artery / Q000000981:diagnostic imaging* / Q000502:physiology*; D017585:Ultrasonography, Doppler, Transcranial