{HEAD ~ The piezoelectric element} is used for emitting ultrasonic signals and for receiving ultrasonic signals that are reflected off of various body structures within {TAIL ~ a patient} 
{ HEAD ~ The piezoelectric element } is used for emitting ultrasonic signals and for receiving ultrasonic signals that are reflected off of various body structures within { TAIL ~ a patient }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL