The type of xdcr that can focus electronically in the slice thickness plane is ______ xdcr.

Two u/s systems produce pulses.  One pulse is 0.4µs in duration and the other is 0.2µs long.  Which pulse is most likely to provide the best radial resolution?                    

Which of the following factors does NOT have a significant effect on the lateral resolution of an  image?                                                                                                                 

Array xdcr:

The axial resolution of a system is determined by:                                                             

Which of the following is a natural occurring piezoelectric material?

Before a ceramic xdcr element, such as lead zirconate titanate, is suitable as an u/s xdcr, it must be:

In soft tissue, if the pulse round trip time is 65µs, what is the distance from the source to the  reflector?                                                                                                           

The principle which states that all points on a wavefront can be considered as point sources for the production of spherical secondary wavelets was postulated by:

Bandwidth can be increased by: