diff --git a/Modules/DiffusionImaging/DiffusionCore/Algorithms/itkTensorReconstructionWithEigenvalueCorrectionFilter.h b/Modules/DiffusionImaging/DiffusionCore/Algorithms/itkTensorReconstructionWithEigenvalueCorrectionFilter.h
index 9fd7134aa7..0136a7bd16 100644
--- a/Modules/DiffusionImaging/DiffusionCore/Algorithms/itkTensorReconstructionWithEigenvalueCorrectionFilter.h
+++ b/Modules/DiffusionImaging/DiffusionCore/Algorithms/itkTensorReconstructionWithEigenvalueCorrectionFilter.h
@@ -1,253 +1,255 @@
 /*===================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center,
 Division of Medical and Biological Informatics.
 All rights reserved.
 
 This software is distributed WITHOUT ANY WARRANTY; without
 even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.
 
 See LICENSE.txt or http://www.mitk.org for details.
 
 ===================================================================*/
 /*=========================================================================
 
 Program:   Tensor ToolKit - TTK
 Module:    $URL: svn://scm.gforge.inria.fr/svn/ttk/trunk/Algorithms/itkTensorImageToDiffusionImageFilter.h $
 Language:  C++
 Date:      $Date: 2010-06-07 13:39:13 +0200 (Mo, 07 Jun 2010) $
 Version:   $Revision: 68 $
 
 Copyright (c) INRIA 2010. All rights reserved.
 See LICENSE.txt for details.
 
 This software is distributed WITHOUT ANY WARRANTY; without even
 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 PURPOSE.  See the above copyright notices for more information.
 
 =========================================================================*/
 #ifndef _itk_TensorReconstructionWithEigenvalueCorrectionFilter_h_
 #define _itk_TensorReconstructionWithEigenvalueCorrectionFilter_h_
 
 #include "itkImageToImageFilter.h"
 #include <itkDiffusionTensor3D.h>
 #include <itkVectorImage.h>
 #include <vnl/algo/vnl_symmetric_eigensystem.h>
 
 #include <math.h>
 #include <mitkDiffusionImage.h>
 
 
 typedef itk::VectorImage<short, 3>  ImageType;
 
 
 
 
 namespace itk
 {
 
   template <class TDiffusionPixelType, class TTensorPixelType>
   class TensorReconstructionWithEigenvalueCorrectionFilter
     : public ImageToImageFilter< itk::Image< TDiffusionPixelType, 3 >, itk::Image<itk::DiffusionTensor3D<TTensorPixelType>,3> >
   {
 
   public:
 
     typedef TensorReconstructionWithEigenvalueCorrectionFilter                  Self;
     typedef SmartPointer<Self>                          Pointer;
     typedef SmartPointer<const Self>                    ConstPointer;
     typedef ImageToImageFilter< Image< TDiffusionPixelType, 3>,
       Image< DiffusionTensor3D< TTensorPixelType >, 3 > >
       Superclass;
 
     /** Method for creation through the object factory. */
     itkNewMacro(Self);
 
     /** Runtime information support. */
     itkTypeMacro(TensorReconstructionWithEigenvalueCorrectionFilter, ImageToImageFilter);
 
     typedef TDiffusionPixelType                       ReferencePixelType;
     typedef TDiffusionPixelType                       GradientPixelType;
     typedef DiffusionTensor3D< TTensorPixelType >     TensorPixelType;
 
 
     /** Reference image data,  This image is aquired in the absence
     * of a diffusion sensitizing field gradient */
     typedef typename Superclass::InputImageType      ReferenceImageType;
     typedef Image< TensorPixelType, 3 >              TensorImageType;
     typedef TensorImageType                          OutputImageType;
     typedef typename Superclass::OutputImageRegionType
       OutputImageRegionType;
 
     /** Typedef defining one (of the many) gradient images.  */
     typedef Image< GradientPixelType, 3 >            GradientImageType;
 
     /** An alternative typedef defining one (of the many) gradient images.
     * It will be assumed that the vectorImage has the same dimension as the
     * Reference image and a vector length parameter of \c n (number of
     * gradient directions) */
     typedef VectorImage< GradientPixelType, 3 >      GradientImagesType;
     typedef typename GradientImagesType::PixelType         GradientVectorType;
 
 
     /*
     /** Holds the tensor basis coefficients G_k
     typedef vnl_matrix_fixed< double, 6, 6 >         TensorBasisMatrixType;
 
     typedef vnl_matrix< double >                     CoefficientMatrixType;
     */
 
     /** Holds each magnetic field gradient used to acquire one DWImage */
     typedef vnl_vector_fixed< double, 3 >            GradientDirectionType;
 
     /** Container to hold gradient directions of the 'n' DW measurements */
     typedef VectorContainer< unsigned int,
       GradientDirectionType >                  GradientDirectionContainerType;
 
 
 
     /** Another set method to add a gradient directions and its corresponding
     * image. The image here is a VectorImage. The user is expected to pass the
     * gradient directions in a container. The ith element of the container
     * corresponds to the gradient direction of the ith component image the
     * VectorImage.  For the baseline image, a vector of all zeros
     * should be set. */
     void SetGradientImage( GradientDirectionContainerType *,
       const GradientImagesType *image);
 
     /** Set method to set the reference image. */
     void SetReferenceImage( ReferenceImageType *referenceImage )
     {
       if( m_GradientImageTypeEnumeration == GradientIsInASingleImage)
       {
         itkExceptionMacro( << "Cannot call both methods:"
           << "AddGradientImage and SetGradientImage. Please call only one of them.");
       }
 
       this->ProcessObject::SetNthInput( 0, referenceImage );
 
       m_GradientImageTypeEnumeration = GradientIsInManyImages;
     }
 
     /** Get reference image */
     virtual ReferenceImageType * GetReferenceImage()
     { return ( static_cast< ReferenceImageType *>(this->ProcessObject::GetInput(0)) ); }
 
     /** Return the gradient direction. idx is 0 based */
     virtual GradientDirectionType GetGradientDirection( unsigned int idx) const
     {
       if( idx >= m_NumberOfGradientDirections )
       {
         itkExceptionMacro( << "Gradient direction " << idx << "does not exist" );
       }
       return m_GradientDirectionContainer->ElementAt( idx+1 );
     }
 
     itkSetMacro( BValue, TTensorPixelType);
     itkSetMacro( B0Threshold, float);
+    itkSetMacro (Flagstatus, int);
 
     itkGetMacro(PseudoInverse, vnl_matrix<double>);
     itkGetMacro(H, vnl_matrix<double>);
     itkGetMacro(BVec, vnl_vector<double>);
     itkGetMacro(B0Mask, vnl_vector<short>);
     itkGetMacro(Voxdim, vnl_vector<double>);
 
     mitk::DiffusionImage<short>::Pointer GetOutputDiffusionImage()
     {
       return m_OutputDiffusionImage;
     }
 
     ImageType::Pointer GetVectorImage()
     {
       return m_VectorImage;
     }
 
     itk::Image<short, 3>::Pointer GetMask()
     {
       return m_MaskImage;
     }
 
 
     //itkGetMacro(OutputDiffusionImage, mitk::DiffusionImage<double>)
 
     //itkGetMacro( GradientDirectionContainer, GradientDirectionContainerType::Pointer);
 
   protected:
 
     TensorReconstructionWithEigenvalueCorrectionFilter();
     ~TensorReconstructionWithEigenvalueCorrectionFilter() {};
 
 
     void GenerateData();
 
 
     typedef enum
     {
       GradientIsInASingleImage = 1,
       GradientIsInManyImages,
       Else
     } GradientImageTypeEnumeration;
 
 
 
   private:
 
     short CheckNeighbours(int x, int y, int z,int f, itk::Size<3> size);
 
     void CalculateAttenuation(vnl_vector<double> org_data, vnl_vector<double> &atten,int nof,int numberb0);
 
 
     void CalculateTensor(vnl_matrix<double> pseudoInverse,vnl_vector<double> atten, vnl_vector<double> &tensor,int nof,int numberb0);
 
     /** Gradient image was specified in a single image or in multiple images */
     GradientImageTypeEnumeration                      m_GradientImageTypeEnumeration;
 
     /** Number of gradient measurements */
     unsigned int                                      m_NumberOfGradientDirections;
 
     /** container to hold gradient directions */
     GradientDirectionContainerType::Pointer           m_GradientDirectionContainer;
 
 
     /** b-value */
     TTensorPixelType                                  m_BValue;
 
     /** Number of baseline images */
     unsigned int                                      m_NumberOfBaselineImages;
 
     mitk::DiffusionImage<short>::Pointer              m_OutputDiffusionImage;
 
     ImageType::Pointer                                m_VectorImage;
 
     float                                             m_B0Threshold;
 
 
 
     itk::Image<short, 3>::Pointer m_MaskImage;
     vnl_matrix<double> m_PseudoInverse;
     vnl_matrix<double> m_H;
     vnl_vector<double> m_BVec;
     vnl_vector<short> m_B0Mask;
     vnl_vector<double> m_Voxdim;
+    int  m_Flagstatus;
 
     typename GradientImagesType::Pointer m_GradientImagePointer;
 
   };
 
 
 
 
 
 
 } // end of namespace
 
 
 #ifndef ITK_MANUAL_INSTANTIATION
 #include "itkTensorReconstructionWithEigenvalueCorrectionFilter.txx"
 #endif
 
 
 #endif
diff --git a/Modules/DiffusionImaging/DiffusionCore/Algorithms/itkTensorReconstructionWithEigenvalueCorrectionFilter.txx b/Modules/DiffusionImaging/DiffusionCore/Algorithms/itkTensorReconstructionWithEigenvalueCorrectionFilter.txx
index 88d1f7e0ad..7a48b554e8 100644
--- a/Modules/DiffusionImaging/DiffusionCore/Algorithms/itkTensorReconstructionWithEigenvalueCorrectionFilter.txx
+++ b/Modules/DiffusionImaging/DiffusionCore/Algorithms/itkTensorReconstructionWithEigenvalueCorrectionFilter.txx
@@ -1,594 +1,605 @@
 /*===================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center,
 Division of Medical and Biological Informatics.
 All rights reserved.
 
 This software is distributed WITHOUT ANY WARRANTY; without
 even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.
 
 See LICENSE.txt or http://www.mitk.org for details.
 
 ===================================================================*/
 /*=========================================================================
 
 Program:   Tensor ToolKit - TTK
 Module:    $URL: svn://scm.gforge.inria.fr/svn/ttk/trunk/Algorithms/itkTensorImageToDiffusionImageFilter.txx $
 Language:  C++
 Date:      $Date: 2010-06-07 13:39:13 +0200 (Mo, 07 Jun 2010) $
 Version:   $Revision: 68 $
 
 Copyright (c) INRIA 2010. All rights reserved.
 See LICENSE.txt for details.
 
 This software is distributed WITHOUT ANY WARRANTY; without even
 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 PURPOSE.  See the above copyright notices for more information.
 
 =========================================================================*/
 #ifndef _itk_TensorReconstructionWithEigenvalueCorrectionFilter_txx_
 #define _itk_TensorReconstructionWithEigenvalueCorrectioFiltern_txx_
 #endif
 #include "itkImageRegionConstIterator.h"
 #include <math.h>
 #include <mitkImageWriter.h>
 
 
 
 namespace itk
 {
 
 
   template <class TDiffusionPixelType, class TTensorPixelType>
   TensorReconstructionWithEigenvalueCorrectionFilter<TDiffusionPixelType, TTensorPixelType>
     ::TensorReconstructionWithEigenvalueCorrectionFilter()
   {
     m_B0Threshold = 50.0;
+    m_Flagstatus = 0;
   }
 
   template <class TDiffusionPixelType, class TTensorPixelType>
   void
   TensorReconstructionWithEigenvalueCorrectionFilter<TDiffusionPixelType, TTensorPixelType>
-  ::GenerateData ( )
+  ::GenerateData ()
   {
+
     m_GradientImagePointer = static_cast< GradientImagesType * >(
       this->ProcessObject::GetInput(0) );
 
     typename GradientImagesType::SizeType size = m_GradientImagePointer->GetLargestPossibleRegion().GetSize();
     int nof = m_GradientDirectionContainer->Size();
     int numberb0=0;
 
     int cnt=0;
 
     for(int i=0; i<nof; i++)
     {
       vnl_vector_fixed <double, 3 > vec = m_GradientDirectionContainer->ElementAt(i);
 
       if(vec[0]<0.0001 && vec[1]<0.0001 && vec[2]<0.0001 && vec[0]>-0.0001&& vec[1]>-0.0001 && vec[2]>-0.0001)
       {
         numberb0++;
       }
     }
 
 
     itk::Vector<double,3u> spacing_term = m_GradientImagePointer->GetSpacing();
     itk::Matrix<double,3u,3u> direction_term = m_GradientImagePointer->GetDirection();
 
     vnl_vector <double> spacing_vnl(3);
     vnl_matrix <double> dir_vnl (3,3);
 
     for (int i=0;i<3;i++)
     {
       spacing_vnl[i]=spacing_term[i];
 
       for(int j=0;j<3;j++)
       {
         dir_vnl[i][j]=direction_term[i][j];
       }
     }
 
     vnl_matrix <double> vox_dim_step (3,3);
 
     for (int i=0;i<3;i++)
     {
       for(int j=0;j<3;j++)
       {
         vox_dim_step[i][j]=spacing_vnl[i]*dir_vnl[i][j];
       }
     }
 
     vnl_symmetric_eigensystem <double> eigen_spacing(vox_dim_step);
 
     vnl_vector <double> vox_dim (3);
 
     vox_dim[0]=eigen_spacing.get_eigenvalue(0);
     vox_dim[1]=eigen_spacing.get_eigenvalue(1);
     vox_dim[2]=eigen_spacing.get_eigenvalue(2);
 
     vox_dim=vox_dim/(vox_dim.min_value());
 
 
     vnl_matrix<double> directions(nof-numberb0,3);
     m_B0Mask.set_size(nof);
 
     for(int i=0; i<nof; i++)
     {
       vnl_vector_fixed <double, 3 > vec = m_GradientDirectionContainer->ElementAt(i);
 
       if(vec[0]<0.0001 && vec[1]<0.0001 && vec[2]<0.0001 && vec[0]>-0.001&& vec[1]>-0.001 && vec[2]>-0.001)
       {
         m_B0Mask[i]=1;
       }
       else
       {
         m_B0Mask[i]=0;
         directions[cnt][0] = vec[0];
         directions[cnt][1] = vec[1];
         directions[cnt][2] = vec[2];
         cnt++;
       }
     }
 
     vnl_matrix<double> dirsTimesDirsTrans = directions*directions.transpose();
 
     vnl_vector< double> diagonal(nof-numberb0);
     vnl_vector< double> b_vec(nof-numberb0);
     vnl_vector< double> temporary(3);
 
     for (int i=0;i<nof-numberb0;i++)
     {
       diagonal[i]=dirsTimesDirsTrans[i][i];
     }
 
     double max_diagonal = diagonal.max_value();
-    directions=directions*sqrt(m_BValue/1000.0)*(1.0/sqrt(max_diagonal));
+
+    if (m_Flagstatus == 1)
+    {
+      directions=directions*sqrt(m_BValue/1000.0)*(1.0/sqrt(max_diagonal));
+    }
+    else
+    {
+      directions=directions*sqrt(m_BValue)*(1.0/sqrt(max_diagonal));
+    }
+
     dirsTimesDirsTrans = directions*directions.transpose();
 
     for (int i=0;i<nof-numberb0;i++)
     {
       b_vec[i]= dirsTimesDirsTrans[i][i];
     }
 
     vnl_matrix<double> H(nof-numberb0, 6);
     vnl_matrix<double> H_org(nof-numberb0, 6);
     vnl_vector<double> pre_tensor(9);
 
     int etbt[6] = { 0, 4, 8, 1, 5, 2 };
 
     for (int i = 0; i < nof-numberb0; i++)
     {
       for (int j = 0; j < 3; j++)
       {
         temporary[j] = -directions[i][j];
       }
       for (int j = 0; j < 3; j++)
       {
        for (int k = 0; k < 3; k++)
        {
          pre_tensor[k + 3 * j] = temporary[k] * directions[i][j];
        }
       }
       for (int j = 0; j < 6; j++)
       {
         H[i][j] = pre_tensor[etbt[j]];
       }
       for (int j = 0; j < 3; j++)
       {
         H[i][3 + j] *= 2.0;
       }
     }
 
     H_org=H;
 
     vnl_matrix<double> inputtopseudoinverse=H.transpose()*H;
     vnl_symmetric_eigensystem<double> eig( inputtopseudoinverse);
     vnl_matrix<double> pseudoInverse = eig.pinverse()*H.transpose();
 
 
     itk::Index<3> ix;
 
     ImageType::Pointer corrected_diffusion = ImageType::New();
     corrected_diffusion->SetRegions(size);
     corrected_diffusion->SetSpacing(m_GradientImagePointer->GetSpacing());
     corrected_diffusion->SetOrigin(m_GradientImagePointer->GetOrigin());
     corrected_diffusion->SetVectorLength(nof);
     corrected_diffusion->Allocate();
     typedef itk::VariableLengthVector<short> VariableVectorType;
     VariableVectorType variableLengthVector;
     variableLengthVector.SetSize(nof);
 
 
     //  removing negative values
     for ( int x=0;x<size[0];x++)
     {
       for ( int y=0;y<size[1];y++)
       {
         for ( int z=0;z<size[2];z++)
         {
           ix[0] = x;
           ix[1] = y;
           ix[2] = z;
           GradientVectorType pixel2 = m_GradientImagePointer->GetPixel(ix);
           for( int f=0;f<nof;f++)
           {
             if(pixel2[f]<0.0) //frank: pixel2[f]<=0.0
             {
               variableLengthVector[f] = CheckNeighbours(x,y,z,f,size);
             }
             else
             {
               variableLengthVector[f] = pixel2[f];
             }
           }
 
           corrected_diffusion->SetPixel(ix, variableLengthVector);
         }
       }
     }
 
 
 
     vnl_vector<double> org_data(nof);
     vnl_vector<double> atten(nof-numberb0);
     double mean_b=0.0;
     double pixel=0.0;
     vnl_vector<double> tensor (6);
 
     typedef itk::Image<short, 3> MaskImageType;
     MaskImageType::Pointer mask = MaskImageType::New();
     mask->SetRegions(m_GradientImagePointer->GetLargestPossibleRegion().GetSize());
     mask->SetSpacing(m_GradientImagePointer->GetSpacing());
     mask->SetOrigin(m_GradientImagePointer->GetOrigin());
     mask->Allocate();
 
 
     int mask_cnt=0;
     for(int x=0;x<size[0];x++)
     {
       for(int y=0;y<size[1];y++)
       {
         for(int z=0;z<size[2];z++)
         {
           mean_b=0.0;
           ix[0] = x;
           ix[1] = y;
           ix[2] = z;
 
           GradientVectorType pixel = m_GradientImagePointer->GetPixel(ix);
           for (int i=0;i<nof;i++)
           {
             if(m_B0Mask[i]==1)
             {
               mean_b = mean_b + pixel[i];
             }
           }
           mean_b=mean_b/numberb0;
           if(mean_b>m_B0Threshold)
           {
             mask->SetPixel(ix, 1);
             mask_cnt++;
           }
           else
           {
             mask->SetPixel(ix, 0);
           }
 
         }
       }
     }
 
     std::cout << "Number of voxels in mask: " << mask_cnt << std::endl;
 
     typedef itk::Image< itk::DiffusionTensor3D<float>, 3 > TensorImageType;
     TensorImageType::Pointer tensorImg = TensorImageType::New();
     tensorImg->SetRegions(m_GradientImagePointer->GetLargestPossibleRegion().GetSize());
     tensorImg->SetSpacing(m_GradientImagePointer->GetSpacing());
     tensorImg->SetOrigin(m_GradientImagePointer->GetOrigin());
     tensorImg->Allocate();
 
 
     vnl_matrix<double> temp_tensor(3,3);
     vnl_vector<double> eigen_vals(3);
     int number_of_bads=0;
     int old_number_of_bads=10000000000000000;
     int diff=1;
     vnl_vector< double> pixel_max(nof);
     vnl_vector< double> pixel_min(nof);
 
     for (int i=1;i<nof;i++)
     {
       pixel_max[i]=exp(-b_vec[i]*0.01);// here some values for low and high diffusivity were pre define as 0.01 for low and 5 for high
       pixel_min[i]= exp(-b_vec[i]*5);
     }
 
     // Correct voxels with negative eigenvalues
     while(diff>0)
     {
       for (int x=0;x<size[0];x++)
       {
         for (int y=0;y<size[1];y++)
         {
           for (int z=0;z<size[2];z++)
           {
             ix[0] = x;
             ix[1] = y;
             ix[2] = z;
             pixel = mask->GetPixel(ix);
             itk::DiffusionTensor3D<float> ten;
 
             if(mask->GetPixel(ix) == 1)
             {
               ix[0] = x;
               ix[1] = y;
               ix[2] = z;
               GradientVectorType pt = corrected_diffusion->GetPixel(ix);
 
               for (int i=0;i<nof;i++)
               {
                 org_data[i]=pt[i];
               }
 
               CalculateAttenuation(org_data,atten,nof,numberb0);
               CalculateTensor(pseudoInverse,atten,tensor,nof,numberb0);
 
               bool tensor_invalid = false;
 
               // verify tensor, check for -nan values
               for( unsigned int j=0; j<tensor.size(); j++)
               {
                 if( tensor[j] != tensor[j])
                 {
                   tensor[j] = 0;
                   tensor_invalid = true;
                   continue;
                 }
               }
 
               // process only for valid tensors
               if(!tensor_invalid)
               {
                 ///////////////testing
                 ten(0,0) = tensor[0];
                 ten(0,1) = tensor[3];
                 ten(0,2) = tensor[5];
                 ten(1,1) = tensor[1];
                 ten(1,2) = tensor[4];
                 ten(2,2) = tensor[2];
 
                 typename TensorPixelType::EigenValuesArrayType eigenvalues;
                 ten.ComputeEigenValues(eigenvalues);
 
                 temp_tensor[0][0]= tensor[0]; temp_tensor[1][0]= tensor[3]; temp_tensor[2][0]= tensor[5];
                 temp_tensor[0][1]= tensor[3]; temp_tensor[1][1]= tensor[1]; temp_tensor[2][1]= tensor[4];
                 temp_tensor[0][2]= tensor[5]; temp_tensor[1][2]= tensor[4]; temp_tensor[2][2]= tensor[2];
 
                 vnl_symmetric_eigensystem<double> eigen_tensor(temp_tensor);
 
                 eigen_vals[0]=eigen_tensor.get_eigenvalue(0);
                 eigen_vals[1]=eigen_tensor.get_eigenvalue(1);
                 eigen_vals[2]=eigen_tensor.get_eigenvalue(2);
 
               }
               else
               // the tensor is invalid, i.e. contains some NAN entries
               {
                 // set the eigenvalues manually to -1 to force the idx to be marked as bad voxel
                 eigen_vals[0] = eigen_vals[1] = eigen_vals[2] = -1;
               }
 
 
 
               if( eigen_vals[0]>0.0 && eigen_vals[1]>0.0 && eigen_vals[2]>0.0)
               {
                 tensorImg->SetPixel(ix, ten);
               }//end of if eigenvalues
               else
               {
                 number_of_bads++;
                 ten.Fill(0.0);
                 tensorImg->SetPixel(ix, ten);
 
                 for (int f=0;f<nof;f++)
                 {
                   if(pt[f]>pixel_max[f] || pt[f]< pixel_min[f])
                   {
                     variableLengthVector[f] = CheckNeighbours(x,y,z,f,size);
                   }
 
                 }
 
                 corrected_diffusion->SetPixel(ix, variableLengthVector);
               }
             }
 
             else
             {
               ten.Fill(0.0);
               tensorImg->SetPixel(ix, ten);
             }
 
 
           }
         }
 
       }
 
       diff=old_number_of_bads-number_of_bads;
       old_number_of_bads=number_of_bads;
       std::cout << "bad voxels: " << number_of_bads << std::endl;
       number_of_bads=0;
 
 
     }
 
 
 
     this->SetNthOutput(0, tensorImg);
     m_VectorImage = corrected_diffusion;
     m_MaskImage = mask;
     m_PseudoInverse = pseudoInverse;
     m_H = H_org;
     m_BVec=b_vec;
 
     m_Voxdim = vox_dim;
 
   }
 
 
 
   template <class TDiffusionPixelType, class TTensorPixelType>
   void
     TensorReconstructionWithEigenvalueCorrectionFilter<TDiffusionPixelType, TTensorPixelType>
     ::SetGradientImage( GradientDirectionContainerType *gradientDirection,
     const GradientImagesType *gradientImage )
   {
     // Make sure crazy users did not call both AddGradientImage and
     // SetGradientImage
     if( m_GradientImageTypeEnumeration == GradientIsInManyImages )
     {
       itkExceptionMacro( << "Cannot call both methods:"
         << "AddGradientImage and SetGradientImage. Please call only one of them.");
     }
 
     this->m_GradientDirectionContainer = gradientDirection;
 
 
     unsigned int numImages = gradientDirection->Size();
     this->m_NumberOfBaselineImages = 0;
 
     this->m_NumberOfGradientDirections = numImages - this->m_NumberOfBaselineImages;
 
     // ensure that the gradient image we received has as many components as
     // the number of gradient directions
     if( gradientImage->GetVectorLength() != this->m_NumberOfBaselineImages + this->m_NumberOfGradientDirections )
     {
       itkExceptionMacro( << this->m_NumberOfGradientDirections << " gradients + " << this->m_NumberOfBaselineImages
         << "baselines = " << this->m_NumberOfGradientDirections + this->m_NumberOfBaselineImages
         << " directions specified but image has " << gradientImage->GetVectorLength()
         << " components.");
     }
 
     this->ProcessObject::SetNthInput( 0,
       const_cast< GradientImagesType* >(gradientImage) );
     m_GradientImageTypeEnumeration = GradientIsInASingleImage;
   }
 
   template <class TDiffusionPixelType, class TTensorPixelType>
   short
   TensorReconstructionWithEigenvalueCorrectionFilter<TDiffusionPixelType, TTensorPixelType>
   ::CheckNeighbours(int x, int y, int z,int f, itk::Size<3> size)
   {
     int init_i, init_j, init_c, limit_i, limit_j, limit_c;
     double tempsum=0.0;
     double temp_number=0.0;
 
     init_i=x-1;
     limit_i=x+2;
     if(x==0)
       init_i=x;
     else if(x==size[0]-1)
       limit_i=x+1;
 
     init_j=y-1;
     limit_j=y+2;
     if(y==0)
       init_j=y;
     else if(y==size[1]-1)
       limit_j=y+1;
 
     init_c=z-1;
     limit_c=z+2;
     if(z==0)
       init_c=z;
     else if(z==size[2]-1)
       limit_c=z+1;
 
     for(int i=init_i; i<limit_i; i+=2)
     {
       for (int j=init_j; j<limit_j; j+=2)
       {
         for (int c=init_c; c<limit_c ;c+=2)
         {
 
           itk::Index<3> ix;
           ix[0] = i;
           ix[1] = j;
           ix[2] = c;
 
           GradientVectorType p = m_GradientImagePointer->GetPixel(ix);
 
           if(p[f]>=0.0)
           {
             tempsum=tempsum+p[f];
             temp_number++;
           }
         }
       }
     }
     if (temp_number==0.0)
     {
       tempsum=0.0;
     }
     else
     {
       tempsum=tempsum/temp_number;
     }
 
     short ret = (short)tempsum;
     return ret;
   }
 
 
   template <class TDiffusionPixelType, class TTensorPixelType>
   void
   TensorReconstructionWithEigenvalueCorrectionFilter<TDiffusionPixelType, TTensorPixelType>
   ::CalculateAttenuation(vnl_vector<double> org_data,vnl_vector<double> &atten,int nof, int numberb0)
   {
     double mean_b=0.0;
 
 
     for (int i=0;i<nof;i++)
     {
       if(m_B0Mask[i]==1)
       {
         mean_b=mean_b+org_data[i];
       }
 
     }
     mean_b=mean_b/numberb0;
     int cnt=0;
     for (int i=0;i<nof;i++)
     {
       if(m_B0Mask[i]==0)
       {
         if(org_data[i]<0.001){org_data[i]=0.01;}
         atten[cnt]=org_data[i]/mean_b;
         cnt++;
       }
     }
   }
 
 
   template <class TDiffusionPixelType, class TTensorPixelType>
   void
   TensorReconstructionWithEigenvalueCorrectionFilter<TDiffusionPixelType, TTensorPixelType>
   ::CalculateTensor(vnl_matrix<double> pseudoInverse,vnl_vector<double> atten,vnl_vector<double> &tensor, int nof,int numberb0)
   {
     for (int i=0;i<nof-numberb0;i++)
     {
       atten[i]=log((double)atten[i]);
     }
     tensor = pseudoInverse*atten;
   }// end of void calculate tensor
 
 } // end of namespace