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