Scus (Spatially Coherent Ultrasound Simulation)

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Extract scatterer from any position corresponding to an ultrasound probe

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Dependencies

Scatterer generation

(Ubuntu)
- libglm-dev
- libdcmtk-dev
- libtbb-dev

(Fedora)
- glm-devel
- dcmtk-devel
- tbb-devel

Visualisation

pip install plotly
pip install pandas

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Compilation

mkdir build
cd build
cmake ..
make

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Usage

Scatterer generation

./Scus <Setting File>.json

To generate the scatterers according to the settings file (see next section)

Note that the code may be used as an external library to generate scatterers or real-time ultrasound simulation.

Visualisation

Use the scatterer_visualisation.py script to visualize scatterers generated using the SPACE or PROJECTED modes

Simulation

Scatterers generated with the RAW are ready to be used with a standard ultrasound image simulator as in the examples provided

Field II

Write the scatterers file name in scus_phantom.m then use the functions field_init(0), mk_pht() and sim_img(). Additionally, python code to run multiple RF line simulation at once is also provided.

SIMUS

Simply use the generateImageFromScats(filename) function, the simulation parameters are adjustable in the .m file

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Settings file format

Json file

{
    "Grid" : { 
        see GRID
    },
    "Acquisition Zone" : {
        see ACQUISITION
    },
    "OutFile" : {
        "Mode": "SPACE"/"PROJECTED"/"RAW",  //SPACE/PROJECTED: For visualisation. RAW: To be used in simulations
        "Name": ...                         //name of the outfile
    }
}

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Grid

"Dimension":{                  //in mm
   "x":number,                 //multiples of CellDim
   "y":number,
   "z":number
},

"UseRot":true/false,           //random rotation of the cells
"CellDim":number,              //mm
"SamplesPerCell":number,
"Sampler":"dart"/"regular"/"uniform"/"cascaded",
"FixedSeed":number,            //-1 for time based random

"WeightingObject":{
   see WEIGTHINGOBJECT
}

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Acquition Zone

"Dimension":{                   //mm
    "Width":number,
    "Height":number,
    "Depth":number
 },
 
"Position":{                    //mm
    "x":number,
    "y":number,
    "z":number
 },
 
 "Rotation":{
    "Angle":number              //degree
    
    "Axis":{                    //axis of the rotation, will be normalized
        "x":number,
        "y":number,
        "z":number
} 

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Weighting Object

"Type":"Dicom"/"Plane"/"Sphere"/"Cube",

Dicom (Opening medical data in slices form)

"Files":[
    pathtodicom1,
    pathtodicom2,
    ...
    pathtodicomN
]

Plane (Medium seperated in two by a plane)

"Height":number                 //mm

Sphere

"Position":{                    //mm
    "x":number,
    "y":number,
    "z":number
 },
"Radius":number                 //mm

Cube

"Position":{                    //mm
    "x":number,
    "y":number,
    "z":number
 },
"Side":number                   //mm