Doppler for holes in the head.
D002675:Child, Preschool; D004301:Doppler Effect; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D055585:Physical Phenomena; D010825:Physics; D012886:Skull / Q000033:anatomy & histology; D014652:Vascular Diseases / Q000175:diagnosis*