| http://www.w3.org/ns/prov#value | - The device transmits ultrasonic waves from its ultrasonic transducer attached to the distal end of a catheter inserted into a body cavity such as a vein or vessel, receives the echoes reflected from reflective members of the subject, and displays them as images on a display such as a CRT (cathode ray tube) after processing such as amplification and detection.
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