What physical concept allows us to determine the location of an interface by measuring the elapsed time between the transmitted pulsed u/s wave and the detected echo from that interface?

Ultrasonic image resolution through the entire field of view can be improved best by using multiple:                                                                                                             

In a pulse-echo system, the quality factor should be made as large as possible: 

Transducers should NOT be heat sterilized because:

The lateral resolution of a system:                            

You are asked to fabricate a pulsed u/s xdcr with the lowest possible frequency. Which piezoelectric crystal would you select?

Heat sterilization will damage the piezoelectric properties of the xdcr element if the high temperature used is equal to:

A CW sinusoidal wave is characterized by multiple frequencies.

Ultrasound xdcr convert _________ energy into ______ energy and vice versa.

Which statement below BEST describes the consequence of damping material?