With these xdcr, a trapezoidal image shape is produced. The image is flat at the top and becomes progressively wider at increasing depths.

Which xdcr has the WORST axial resolution?                                                                      

Which transmit firing pattern would result in the longest focus?

The lateral resolution of an u/s system is 4 mm.  Two structures are separated by 3 mm and lie side by side in relation to the sound beam’s main axis.  What will most likely appear on the display of the system?                                                                                    

Which of the following does NOT display a sector format?

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: