Diagnostic ultrasound equipment: development of action program.
D004865:Equipment and Supplies, Hospital / Q000592:standards; D005260:Female; D006801:Humans; D007882:Legislation, Hospital; D011247:Pregnancy; D012449:Safety; D014465:Ultrasonics / Q000295:instrumentation*; D014463:Ultrasonography; D014481:United States; D014486:United States Food and Drug Administration