Functions — By Category

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Contents

Time Domain Wave Propagation in Fluid Media

kspaceFirstOrder1D	1D time-domain simulation of wave propagation
kspaceFirstOrder2D	2D time-domain simulation of wave propagation
kspaceFirstOrder3D	3D time-domain simulation of wave propagation
kspaceFirstOrder3DC	3D time-domain simulation of wave propagation using C++ code
kspaceFirstOrder3DG	3D time-domain simulation of wave propagation on a GPU using C++ CUDA code
kspaceSecondOrder	Fast time-domain simulation of wave propagation for homogeneous media

Time Domain Wave Propagation in Elastic Media

pstdElastic2D	2D time-domain simulation of elastic wave propagation
pstdElastic3D	3D time-domain simulation of elastic wave propagation

Time Domain Heat Diffusion

bioheatExact	Compute exact solution to Pennes' bioheat equation in homogeneous media
kWaveDiffusion	Time-domain simulation of heat diffusion and perfusion

Reference Solutions

focusedBowlONeil	Compute O'Neil's solution for focused bowl transducer
mendousse	Compute Mendousse's solution for nonlinear wave propagation in viscous media

Photoacoustic Image Reconstruction

kspaceLineRecon	2D linear FFT reconstruction
kspacePlaneRecon	3D planar FFT reconstruction

See also kspaceFirstOrder1D, kspaceFirstOrder2D, and kspaceFirstOrder3D for time-reversal image reconstruction

Geometry and Shape Creation

makeArc	Create a binary map of an arc within a 2D grid
makeBall	Create a binary map of a filled ball within a 3D grid
makeBowl	Create a binary map of a bowl within a 3D grid
makeCartCircle	Create a 2D Cartesian circle or arc
makeCartSphere	Create a 3D Cartesian sphere
makeCircle	Create a binary map of a circle within a 2D grid
makeDisc	Create a binary map of a filled disc within a 2D grid
makeLine	Create a binary map of a straight line within a 2D grid
makeMultiArc	Create a binary map of multiple arcs within a 2D grid
makeMultiBowl	Create a binary map of multiple bowls within a 3D grid
makeSphere	Create a binary map of a sphere within a 3D grid
makeSphericalSection	Create a binary map of a sphere segment within a 3D grid

Acoustic Absorption Coefficient Calculation and Conversion

attenComp	Attenuation compensation using time-variant filtering
attenuationWater	Calculate ultrasound attenuation in distilled water
db2neper	Convert decibels to nepers
fitPowerLawParams	Fit power law absorption parameters for highly absorbing media
neper2db	Convert nepers to decibels
powerLawKramersKronig	Calculate dispersion for power law absorption

Grid and Matrix Utilities

cart2grid	Interpolate a set of Cartesian points onto a binary grid
expandMatrix	Enlarge a matrix by extending the edge values
findClosest	Return the closest value in a matrix
getSpacedPoints	Create vector of log or linear spaced points
grid2cart	Return the Cartesian coordinates of the non-zero points of a binary grid
interpCartData	Interpolate data from a Cartesian to a binary sensor mask
interpftn	Resample data using Fourier interpolation
kWaveGrid	Class definition for k-Wave grid
loadImage	Load an image file
maxND	Return the value and indices of the largest value in an N-D array
minND	Return the value and indices of the smallest value in an N-D array
numDim	Return the number of matrix dimensions
resize	Resize a matrix
reorderSensorData	Reorder sensor data from kspaceFirstOrder2D based on angle
revolve2D	Form 3D matrix from revolution of 2D matrix
fourierShift	Resample data using a Fourier interpolant
unmaskSensorData	Reorder data recorded using a binary sensor mask

Filtering and Spectral Utilities

applyFilter	Filter input with low, high, or band pass filter
envelopeDetection	Extract signal envelope using the Hilbert Transform
filterTimeSeries	Filter signal using the Kaiser windowing method
gaussianFilter	Filter signals using a frequency domain Gaussian filter
getAlphaFilter	Create filter for medium.alpha_filter
getBLI	Compute underlying Fourier band-limited interpolant (BLI)
getFDMatrix	Create a matrix of finite-difference coefficients
getWin	Return a frequency domain windowing function
gradientFD	Calculate the gradient using a finite-difference method
gradientSpect	Calculate the gradient using a Fourier spectral method
sharpness	Calculate image sharpness metric
spect	Compute the single sided amplitude and phase spectrums
smooth	Smooth a matrix
vesselFilter	Frangi's 3D vessel filter

Display and Visualisation

beamPlot	Plot volumetric data using intersecting planes
flyThrough	Display a three-dimensional matrix slice by slice
getColorMap	Return default k-Wave color map
overlayPlot	Overlay two images
saveTiffStack	Save volume data as a tiff stack
scaleFig	Resize current figure window
stackedPlot	Stacked linear plot
voxelPlot	3D plot of voxels in a binary matrix

Signal Creation and Processing

addNoise	Add Gaussian noise to a signal for a given SNR
createCWSignals	Generate array of CW signals from amplitude and phase
envelopeDetection	Extract signal envelope using the Hilbert Transform
extractAmpPhase	Extract amplitude and phase from CW signals
focus	Create input signal based on source mask and focus position
fwhm	Compute the full width at half maximum
gaussian	Create a Gaussian distribution
gaussianFilter	Filter signals using a frequency domain Gaussian filter
hounsfield2density	Convert Hounsfield units to density
kWaveTransducer	Class definition for k-Wave linear array transducer
logCompression	Log compress an input signal
scanConversion	Convert scan-lines in polar coordinates to a B-mode ultrasound image
toneBurst	Create an enveloped single frequency tone burst

HDF5 Utilities

h5compare	Compare the contents of two HDF5 files
writeAttributes	Write attributes to a k-Wave HDF5 file
writeFlags	Write input flags to a k-Wave HDF5 file
writeGrid	Write grid and PML properties to a k-Wave HDF5 file
writeMatrix	Write MATLAB matrix to a k-Wave HDF5 file

System Parameters and Utilities

benchmark	Run performance benchmark
checkFactors	Return the maximum prime factor for a range of numbers
checkStability	Return maximum stable time step for k-space fluid models
getDateString	Create a string of the current date and time
getComputerInfo	Return information about computer and k-Wave version
getkWavePath	Return pathname to the k-Wave Toolbox
scaleSI	Scale a number to nearest SI unit prefix
scaleTime	Convert seconds to hours, minutes, and seconds
speedSoundWater	Calculate the speed of sound in water with temperature