The DELFI ultrasound simulation tool is used to simulation the field resulting from a given ultrasound system. This tool is complementary to the established FIELD II simulation tool in that it is optimized to calculate the system response throughout space at a given instant in time rather than the response at a specific location in space throughout time.
The source code for FIELD II is not openly available. However, I believe it may by available for purchase from the site where you downloaded it.
Do you have source code for "Mat_field.dll" in Field_II_PC5.tar.Z.
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