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Field II ultrasonic displacement tracking code using FEM displacement fields

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Dear Professor Palmeri, Thank you for creating such nice projects and letting everyone use them! I succeeded to simulate some shear wave propagations thanks to your other repo. And now...

help wanted

Hi Mark, I'm a postdoc at UC-Davis looking to give your code a whirl. Could you tell me if it is intended not only for those at Duke? If so,...

question

https://github.com/mlp6/ultratrack/blob/0d1ac6bf0f8f81306eebb4a76d8826969723aafe/phantom.py#L166 create a python method, and associated unit test, to do this 3D linear interpolation

``` Error in dynaField (line 47) set_field('threads', threads); ``` This option is only available in Field II Pro; need to try to detect the version being run to exclude this...

bug

`feature('numcores')` for user-specified / -limited

reduce dependence on MAT file format (HDF5)

doesn't work at all in Windows... too long for practical linux usage too. really need to think this scheme over.

Matlab-based code has to work with `disp.dat` files instead of compressed `disp.dat.xz`; not ideal.

This change was a little more involved (no MEX file unfortunately, just straight Matlab). Basically, there are 2 kinds of interpolant classes in matlab, griddedInterpolant and scatteredInterpolant. The gridded version...