The case for ultrasound.
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D003952:Diagnostic Imaging / Q000379:methods* / Q000639:trends; D005544:Forecasting; D006801:Humans; D008279:Magnetic Resonance Imaging; D009682:Magnetic Resonance Spectroscopy; D019060:Minimally Invasive Surgical Procedures; D014463:Ultrasonography / Q000379:methods* / Q000639:trends; D014481:United States; D014965:X-Rays