Field II is a program for simulating ultrasound tranducer fields and ultrasound imaging using linear acoustics. The programs uses the Tupholme-Stepanishen method for calculating pulsed ultrasound fields. The program is capable of calculating the emitted and pulse-echo fields for both the pulsed and continuous wave case for a large number of different transducers. Also any kind of linear imaging can be simulated as well as realistic images of human tissue. The program is running under Matlab on a number of different operating system (Windows, Linux, Mac OS X, HP-UX, SUN, SGI, IBM and Alpha), and the programs are currently free to use under certain restrictions (see copyright).

The distribution files have been updated May 6, 2011. They now include the users guide and a small bug fix has been made for m-file xdc_apodization.

The latest release of the program is version 3.20 of November 19, 2010. Note that this code will work with Matlab 7.10 under Linux and Windows in both 32 and 64 bits versions. The memory bug in the code should now be fixed, so please use this new version. An new version for the Intel Mac has also been made on June 9, 2011.

The latest News is from June 9, 2011 on the Matlab 7.10 version for the Intel Mac.