rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType > Class Template Reference

#include <rtkInterpolatorWithKnownWeightsImageFilter.h>

Inheritance diagram for rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >:

Collaboration diagram for rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >:

Public Types
using	Pointer = itk::SmartPointer< Self >
using	Self = InterpolatorWithKnownWeightsImageFilter
using	Superclass = itk::ImageToImageFilter< VolumeType, VolumeType >

Public Member Functions
virtual ::itk::LightObject::Pointer	CreateAnother () const
virtual int	GetProjectionNumber ()
void	SetInputVolume (const VolumeType *Volume)
void	SetInputVolumeSeries (const VolumeSeriesType *VolumeSeries)
void	SetProjectionNumber (int n)
virtual const char *	GetNameOfClass () const
virtual itk::Array2D< float >	GetWeights ()
virtual void	SetWeights (itk::Array2D< float > _arg)

Static Public Member Functions
static Pointer	New ()

Protected Member Functions
void	DynamicThreadedGenerateData (const typename VolumeType::RegionType &outputRegionForThread) override
void	GenerateInputRequestedRegion () override
VolumeType::ConstPointer	GetInputVolume ()
VolumeSeriesType::Pointer	GetInputVolumeSeries ()
	InterpolatorWithKnownWeightsImageFilter ()
	~InterpolatorWithKnownWeightsImageFilter () override=default

Protected Attributes
int	m_ProjectionNumber
itk::Array2D< float >	m_Weights

Detailed Description

template<typename VolumeType, typename VolumeSeriesType>
class rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >

Interpolates (linearly) in a 3D+t sequence of volumes to get a 3D volume.

See the reference paper: "Cardiac C-arm computed tomography using a 3D + time ROI reconstruction method with spatial and temporal regularization" by Mory et al.

4D conjugate gradient reconstruction consists in iteratively minimizing the following cost function:

Sum_over_theta || R_theta S_theta f - p_theta ||_2^2

with

• f a 4D series of 3D volumes, each one being the reconstruction at a given respiratory/cardiac phase
• p_theta is the projection measured at angle theta
• S_theta an interpolation operator which, from the 3D + time sequence f, estimates the 3D volume through which projection p_theta has been acquired
• R_theta is the X-ray transform (the forward projection operator) for angle theta

Computing the gradient of this cost function yields:

S_theta^T R_theta^T R_theta S_theta f - S_theta^T R_theta^T p_theta

where A^T means the adjoint of operator A.

InterpolatorWithKnownWeightsImageFilter implements S_theta.

Test:

rtkfourdconjugategradienttest.cxx

Author

Cyril Mory

Definition at line 64 of file rtkInterpolatorWithKnownWeightsImageFilter.h.

Member Typedef Documentation

Pointer

template<typename VolumeType , typename VolumeSeriesType >

using rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::Pointer = itk::SmartPointer<Self>

Definition at line 73 of file rtkInterpolatorWithKnownWeightsImageFilter.h.

Self

template<typename VolumeType , typename VolumeSeriesType >

using rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::Self = InterpolatorWithKnownWeightsImageFilter

Standard class type alias.

Definition at line 71 of file rtkInterpolatorWithKnownWeightsImageFilter.h.

Superclass

template<typename VolumeType , typename VolumeSeriesType >

using rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::Superclass = itk::ImageToImageFilter<VolumeType, VolumeType>

Definition at line 72 of file rtkInterpolatorWithKnownWeightsImageFilter.h.

Constructor & Destructor Documentation

InterpolatorWithKnownWeightsImageFilter()

template<typename VolumeType , typename VolumeSeriesType >

rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::InterpolatorWithKnownWeightsImageFilter ( )

protected

~InterpolatorWithKnownWeightsImageFilter()

template<typename VolumeType , typename VolumeSeriesType >

rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::~InterpolatorWithKnownWeightsImageFilter ( )

overrideprotecteddefault

Member Function Documentation

CreateAnother()

template<typename VolumeType , typename VolumeSeriesType >

virtual::itk::LightObject::Pointer rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::CreateAnother ( ) const

virtual

Reimplemented from itk::Object.

DynamicThreadedGenerateData()

template<typename VolumeType , typename VolumeSeriesType >

void rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::DynamicThreadedGenerateData ( const typename VolumeType::RegionType &  outputRegionForThread )

overrideprotected

Does the real work.

GenerateInputRequestedRegion()

template<typename VolumeType , typename VolumeSeriesType >

void rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::GenerateInputRequestedRegion ( )

overrideprotectedvirtual

Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >.

GetInputVolume()

template<typename VolumeType , typename VolumeSeriesType >

VolumeType::ConstPointer rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::GetInputVolume ( )

protected

GetInputVolumeSeries()

template<typename VolumeType , typename VolumeSeriesType >

VolumeSeriesType::Pointer rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::GetInputVolumeSeries ( )

protected

GetNameOfClass()

template<typename VolumeType , typename VolumeSeriesType >

virtual const char* rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::GetNameOfClass ( ) const

virtual

Run-time type information (and related methods).

Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >.

GetProjectionNumber()

template<typename VolumeType , typename VolumeSeriesType >

virtual int rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::GetProjectionNumber ( )

virtual

GetWeights()

template<typename VolumeType , typename VolumeSeriesType >

virtual itk::Array2D<float> rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::GetWeights ( )

virtual

Macros that take care of implementing the Get and Set methods for Weights and ProjectionNumber.

New()

template<typename VolumeType , typename VolumeSeriesType >

static Pointer rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::New ( )

static

Method for creation through the object factory.

SetInputVolume()

template<typename VolumeType , typename VolumeSeriesType >

void rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::SetInputVolume

(

const VolumeType *

Volume

)

The 3D image to be updated.

SetInputVolumeSeries()

template<typename VolumeType , typename VolumeSeriesType >

void rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::SetInputVolumeSeries

(

const VolumeSeriesType *

VolumeSeries

)

The 4D image that will be interpolated, with coefficients, generate a 3D volume.

SetProjectionNumber()

template<typename VolumeType , typename VolumeSeriesType >

void rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::SetProjectionNumber

(

int

n

)

SetWeights()

template<typename VolumeType , typename VolumeSeriesType >

virtual void rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::SetWeights ( itk::Array2D< float >  _arg )

virtual

Macros that take care of implementing the Get and Set methods for Weights and ProjectionNumber.

Member Data Documentation

m_ProjectionNumber

template<typename VolumeType , typename VolumeSeriesType >

int rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::m_ProjectionNumber

protected

Definition at line 120 of file rtkInterpolatorWithKnownWeightsImageFilter.h.

m_Weights

template<typename VolumeType , typename VolumeSeriesType >

itk::Array2D<float> rtk::InterpolatorWithKnownWeightsImageFilter< VolumeType, VolumeSeriesType >::m_Weights

protected

Definition at line 119 of file rtkInterpolatorWithKnownWeightsImageFilter.h.

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The documentation for this class was generated from the following file:

• rtkInterpolatorWithKnownWeightsImageFilter.h