rtkMotionCompensatedFourDReconstructionConjugateGradientOperator.h

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 *  Copyright RTK Consortium
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 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         https://www.apache.org/licenses/LICENSE-2.0.txt
 *
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 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
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 *=========================================================================*/
#ifndef rtkMotionCompensatedFourDReconstructionConjugateGradientOperator_h
#define rtkMotionCompensatedFourDReconstructionConjugateGradientOperator_h

#include "rtkFourDReconstructionConjugateGradientOperator.h"
#include "rtkCyclicDeformationImageFilter.h"
#include "rtkJosephForwardProjectionImageFilter.h"

#ifdef RTK_USE_CUDA
#  include "rtkCudaWarpForwardProjectionImageFilter.h"
#  include "rtkCudaWarpBackProjectionImageFilter.h"
#  include "rtkCudaCyclicDeformationImageFilter.h"
#endif

namespace rtk
{
template <typename VolumeSeriesType, typename ProjectionStackType>
class ITK_TEMPLATE_EXPORT MotionCompensatedFourDReconstructionConjugateGradientOperator
  : public FourDReconstructionConjugateGradientOperator<VolumeSeriesType, ProjectionStackType>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(MotionCompensatedFourDReconstructionConjugateGradientOperator);

  using Self = MotionCompensatedFourDReconstructionConjugateGradientOperator;
  using Superclass = FourDReconstructionConjugateGradientOperator<VolumeSeriesType, ProjectionStackType>;
  using Pointer = itk::SmartPointer<Self>;

  using VolumeType = ProjectionStackType;
  using VectorForDVF = itk::CovariantVector<typename VolumeSeriesType::ValueType, VolumeSeriesType::ImageDimension - 1>;

  using CPUVolumeSeriesType =
    typename itk::Image<typename VolumeSeriesType::PixelType, VolumeSeriesType::ImageDimension>;
#ifdef RTK_USE_CUDA
  typedef typename std::conditional<std::is_same<VolumeSeriesType, CPUVolumeSeriesType>::value,
                                    itk::Image<VectorForDVF, VolumeSeriesType::ImageDimension>,
                                    itk::CudaImage<VectorForDVF, VolumeSeriesType::ImageDimension>>::type
    DVFSequenceImageType;
  typedef
    typename std::conditional<std::is_same<VolumeSeriesType, CPUVolumeSeriesType>::value,
                              itk::Image<VectorForDVF, VolumeSeriesType::ImageDimension - 1>,
                              itk::CudaImage<VectorForDVF, VolumeSeriesType::ImageDimension - 1>>::type DVFImageType;
  typedef typename std::conditional<std::is_same<VolumeSeriesType, CPUVolumeSeriesType>::value,
                                    JosephForwardProjectionImageFilter<ProjectionStackType, ProjectionStackType>,
                                    CudaWarpForwardProjectionImageFilter>::type WarpForwardProjectionImageFilterType;
  typedef typename std::conditional<std::is_same<VolumeSeriesType, CPUVolumeSeriesType>::value,
                                    BackProjectionImageFilter<VolumeType, VolumeType>,
                                    CudaWarpBackProjectionImageFilter>::type    WarpBackProjectionImageFilterType;
#else
  using DVFSequenceImageType = itk::Image<VectorForDVF, VolumeSeriesType::ImageDimension>;
  using DVFImageType = itk::Image<VectorForDVF, VolumeSeriesType::ImageDimension - 1>;
  using WarpForwardProjectionImageFilterType =
    JosephForwardProjectionImageFilter<ProjectionStackType, ProjectionStackType>;
  using WarpBackProjectionImageFilterType = BackProjectionImageFilter<VolumeType, VolumeType>;
#endif
  using CPUDVFInterpolatorType = CyclicDeformationImageFilter<DVFSequenceImageType, DVFImageType>;
#ifdef RTK_USE_CUDA
  typedef typename std::conditional<std::is_same<VolumeSeriesType, CPUVolumeSeriesType>::value,
                                    CPUDVFInterpolatorType,
                                    CudaCyclicDeformationImageFilter>::type CudaCyclicDeformationImageFilterType;
#else
  using CudaCyclicDeformationImageFilterType = CPUDVFInterpolatorType;
#endif

  itkNewMacro(Self);

  itkOverrideGetNameOfClassMacro(MotionCompensatedFourDReconstructionConjugateGradientOperator);

  void
  SetForwardProjectionFilter(typename Superclass::ForwardProjectionFilterType * itkNotUsed(_arg))
  {
    itkExceptionMacro(<< "ForwardProjection cannot be changed");
  }
  void
  SetBackProjectionFilter(typename Superclass::BackProjectionFilterType * itkNotUsed(_arg))
  {
    itkExceptionMacro(<< "BackProjection cannot be changed");
  }

  void
  SetDisplacementField(const DVFSequenceImageType * DisplacementField);
  void
  SetInverseDisplacementField(const DVFSequenceImageType * InverseDisplacementField);
  typename DVFSequenceImageType::ConstPointer
  GetInverseDisplacementField();
  typename DVFSequenceImageType::ConstPointer
  GetDisplacementField();

  void
  SetSignal(const std::vector<double> signal) override;

  itkSetMacro(UseCudaCyclicDeformation, bool);
  itkGetMacro(UseCudaCyclicDeformation, bool);

protected:
  MotionCompensatedFourDReconstructionConjugateGradientOperator();
  ~MotionCompensatedFourDReconstructionConjugateGradientOperator() override = default;

  void
  GenerateOutputInformation() override;

  void
  VerifyInputInformation() const override
  {}

  void
  GenerateData() override;

  typename CPUDVFInterpolatorType::Pointer m_DVFInterpolatorFilter;
  typename CPUDVFInterpolatorType::Pointer m_InverseDVFInterpolatorFilter;
  std::vector<double>                      m_Signal;
  bool                                     m_UseCudaCyclicDeformation;
};
} // namespace rtk


#ifndef ITK_MANUAL_INSTANTIATION
#  include "rtkMotionCompensatedFourDReconstructionConjugateGradientOperator.hxx"
#endif

#endif