Design of medical ultrasonic equipment.
D002508:Cephalometry; D004453:Echoencephalography; D004582:Electronics, Medical; D005260:Female; D005333:Fetus; D006801:Humans; D009774:Obstetrics; D011247:Pregnancy; D013672:Technology; D014465:Ultrasonics / Q000295:instrumentation*; D014463:Ultrasonography