This repository contains an implementation of the nonlinear ultrasound simulator mSOUND for imaging applications.
mSOUND is a transient-mixed- and frequency-specific-mixed-domain (i.e. nonlinear) acoustic wave propagation simulator. This open-source, MATLAB-specific toolset was originally developed by Jiangian Gu and Yun Jing. More information, including preprint copies of the corresponding journal publication can be found at: https://github.com/m-SOUND/mSOUND
The tutorials and examples packaged with mSOUND were primarily intended for beamforming and applied imaging scenarios, including photoacoustics and shear shock wave modeling. This toolset extends the capabilities of mSOUND by defining and imposing additional, medical imaging-related parameters into mSOUND variables and data formats. This addition may allow this toolbox to act as a nonlinear imaging simulator with capabilities similar to more popular software such as Field-II or k-wave.
This repository is structured as follows:
linear_image.m - runs a simulation of a pulse-echo sequence on a designated field of scatterers.
mSOUND - included as a submodule; should be downloaded either in the same folder level as others in this repository, or elsewhere.
shortcut - shortcut functions to quickly define parameters relevant for both mSOUND and ultrasonic imaging.
visualization - shortcut functions to generate simulation-relevant images, useful for debugging
msound_medium - using a set_grid custom object, this function creates a medium structure that incorporates information about the material properties being simulated in mSOUND.
msound_xdcr - using the medium structure among others, this function creates a structure xdcr that contains parameters about the transducer plane in a single, compact object.
msound_excite - using the medium structure among others, this function creates a structure exci that contains matrices depicting pressure waves transmitted from a transducer plane.
msound_beamform - using the outputs from mSOUND-native function Forward2D, this function applies dynamic-receive beamforming on the collected, channel-based pressure waveforms.
msound_nDim - using a set_grid custom object, determine the number of spatial dimensions that mSOUND will simulate. This is useful as a shortcut to easily generalize your code for multiple simulation setups.
testMedium.m - using the medium structure required by mSOUND, generate 2-D images that display heterogeneous features that will be simulated.
msound_images.m - generate raw RF and envelope-detected, log-compressed B-mode images from the beamformed output of an mSOUND simulation.