Ultrasonic field simulation

[Steve]

Hi,

I am very new to the ultrasonic developemnt though I acquired a little
from books for past few weeks. With the background of signal
processing, I would like to know more on ultrasonic arrays. Now I am
looking for some tools or matlab programs to simulate the ultrasonic
fields. The Field II I have downloaded does not run well in my latest
version 6.5.

Thanks for any links or suggestion.

Steve