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