#include <svkMrsImageFFT.h>

Inheritance diagram for svkMrsImageFFT:

Public Types
enum	FFTDomain { SPECTRAL = 0, SPATIAL }

enum	FFTMode { FORWARD = 0, REVERSE }

Public Member Functions
	vtkTypeMacro (svkMrsImageFFT, svkImageInPlaceFilter)

void	SetUpdateExtent (int start, int end)

void	SetFFTDomain (FFTDomain domain)

void	SetFFTMode (FFTMode mode)

void	SetPreCorrectCenter (bool preCorrectCenter)

void	SetPostCorrectCenter (bool postCorrectCenter)

void	SetVoxelShift (double voxelShift[3])

void	OnlyUseSelectionBox ()

Public Member Functions inherited from svkImageInPlaceFilter
	vtkTypeMacro (svkImageInPlaceFilter, vtkImageInPlaceFilter)

svkImageData *	GetOutput ()

svkImageData *	GetOutput (int port)

svkImageData *	GetImageDataInput (int port)

Static Public Member Functions
static svkMrsImageFFT *	New ()

static void	ConvertArrayToImageComplex (vtkDataArray array, vtkImageComplex imageComplexArray)

static void	FFTShift (vtkImageComplex *dataIn, int numPoints)

static void	IFFTShift (vtkImageComplex *dataIn, int numPoints)

Protected Member Functions
	svkMrsImageFFT ()

	~svkMrsImageFFT ()

virtual int	FillInputPortInformation (int port, vtkInformation *info)

virtual int	RequestInformation (vtkInformation request, vtkInformationVector inputVector, vtkInformationVector outputVector)

virtual int	RequestData (vtkInformation request, vtkInformationVector inputVector, vtkInformationVector outputVector)

virtual int	RequestDataSpatial (vtkInformation request, vtkInformationVector inputVector, vtkInformationVector outputVector, vtkImageFourierFilter *fourierFilter)

virtual int	RequestDataSpectral (vtkInformation request, vtkInformationVector inputVector, vtkInformationVector outputVector, vtkImageFourierFilter *fourierFilter)

Protected Member Functions inherited from svkImageInPlaceFilter
	svkImageInPlaceFilter ()

	~svkImageInPlaceFilter ()

virtual int	FillOutputPortInformation (int vtkNotUsed(port), vtkInformation *info)

virtual int	FillInputPortInformation (int vtkNotUsed(port), vtkInformation *info)

Detailed Description

Class to apply spectral or spatial FFT. If both spectral and spatial transforms are required, then should be called multiple timw with SetFFTDomain set appropriately.

Based on reconstruction methods developed by Sarah J. Nelson, Ph.D (UCSF).

Nelson S.J, "Analysis of volume MRI and MR spectroscopic imaging data for the evaluation of patients with brain tumors", Magnetic Resonance in Medicine, 46(2), p228-239 (2001).

In development!

Member Enumeration Documentation

enum FFTDomain

Enumerator
SPECTRAL
SPATIAL

enum FFTMode

Enumerator
FORWARD
REVERSE

Constructor & Destructor Documentation

svkMrsImageFFT ( )

protected

References svkMrsImageFFT::FORWARD, and svkMrsImageFFT::SPECTRAL.

~svkMrsImageFFT ( )

protected

Member Function Documentation

void ConvertArrayToImageComplex	(	vtkDataArray *	spectrum,
		vtkImageComplex *	imageComplexSpectrum
	)

static

Method for converting between vtkDataArrays and vtkImageComplex.

Referenced by svkMrsImageFFT::RequestDataSpectral().

void FFTShift	(	vtkImageComplex *	dataIn,
		int	numPoints
	)

static

Shifts the zero frequency component in output of FFT operation to center of the spectrum. Behaves differently for even and odd data lengths.

Referenced by svkMrsImageFFT::RequestDataSpectral().

int FillInputPortInformation	(	int	port,
		vtkInformation *	info
	)

protectedvirtual

void IFFTShift	(	vtkImageComplex *	dataIn,
		int	numPoints
	)

static

Shifts the zero frequency component from center to origin, for example in preparation for an IFFT. Behaves differently for even and odd data lengths. Assumes that the data is ordered from low to high frequency.

Referenced by svkMrsImageFFT::RequestDataSpectral().

static svkMrsImageFFT* New ( )

static

Referenced by svkMRSZeroOrderPhase::PostPhaseCleanup(), svkMRSFirstPointPhase::PostPhaseCleanup(), svkMRSZeroOrderPhase::PrePhaseSetup(), and svkMRSFirstPointPhase::PrePhaseSetup().

void OnlyUseSelectionBox ( )

int RequestData	(	vtkInformation *	request,
		vtkInformationVector **	inputVector,
		vtkInformationVector *	outputVector
	)

protectedvirtual

References svkMrsImageFFT::RequestDataSpatial(), svkMrsImageFFT::RequestDataSpectral(), svkMrsImageFFT::REVERSE, svkMrsImageFFT::SPATIAL, and svkMrsImageFFT::SPECTRAL.

int RequestDataSpatial	(	vtkInformation *	request,
		vtkInformationVector **	inputVector,
		vtkInformationVector *	outputVector,
		vtkImageFourierFilter *	fourierFilter
	)

protectedvirtual

References svkDcmHeader::COL_INDEX, svkMrsImageFFT::FORWARD, svk4DImageData::GetArray(), svkImageData::GetDcmHeader(), svkDcmHeader::GetDimensionIndexVector(), svkDcmHeader::GetDimensionVectorIndexFromCellID(), svkDcmHeader::GetDimensionVectorValue(), svkMrsImageData::GetImage(), svkImageInPlaceFilter::GetImageDataInput(), svkDcmHeader::GetNumberOfCells(), svkDcmHeader::GetNumberOfCoils(), svkDcmHeader::GetNumberOfTimePoints(), svkDcmHeader::GetStringValue(), loopVector, svkMriImageData::New(), svkImageFourierCenter::New(), svkImageLinearPhase::New(), svkDcmHeader::RemoveElement(), svkMrsImageFFT::REVERSE, svkDcmHeader::ROW_INDEX, svkDcmHeader::SetDimensionVectorValue(), svkMrsImageData::SetImage(), svkImageFourierCenter::SetReverseCenter(), svkImageLinearPhase::SetShiftWindow(), svkDcmHeader::SetValue(), and svkDcmHeader::SLICE_INDEX.

Referenced by svkMrsImageFFT::RequestData().

int RequestDataSpectral	(	vtkInformation *	request,
		vtkInformationVector **	inputVector,
		vtkInformationVector *	outputVector,
		vtkImageFourierFilter *	fourierFilter
	)