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: 

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?

Transducers should NOT be heat sterilized because:

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.

The process of making the impedance values on either side of a boundary as close as possible to reduce reflections is called: