diff --git a/Modules/PhotoacousticsAlgorithms/Algorithms/mitkPhotoacousticBeamformingDMASFilter.cpp b/Modules/PhotoacousticsAlgorithms/Algorithms/mitkPhotoacousticBeamformingDMASFilter.cpp
index 0ea778765d..0bac8bbabd 100644
--- a/Modules/PhotoacousticsAlgorithms/Algorithms/mitkPhotoacousticBeamformingDMASFilter.cpp
+++ b/Modules/PhotoacousticsAlgorithms/Algorithms/mitkPhotoacousticBeamformingDMASFilter.cpp
@@ -1,261 +1,384 @@
 /*===================================================================
 
 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.
 
 ===================================================================*/
 
 
 #include "mitkPhotoacousticBeamformingDMASFilter.h"
 #include "mitkProperties.h"
 #include "mitkImageReadAccessor.h"
 #include <algorithm>
 #include <itkImageIOBase.h>
 #include <chrono>
-
+#include "Algorithms\ITKUltrasound\itkFFT1DComplexConjugateToRealImageFilter.h"
+#include "Algorithms\ITKUltrasound\itkFFT1DRealToComplexConjugateImageFilter.h"
+#include "mitkImageCast.h"
+
+// needed itk image filters
+#include "mitkITKImageImport.h"
+#include "itkForwardFFTImageFilter.h"
+#include "itkGaussianImageSource.h"
+#include "itkInverseFFTImageFilter.h"
+#include "itkFFTShiftImageFilter.h"
+#include "itkMultiplyImageFilter.h"
+#include "itkComplexToModulusImageFilter.h"
 
 mitk::BeamformingDMASFilter::BeamformingDMASFilter() : m_OutputData(nullptr), m_InputData(nullptr)
 {
   this->SetNumberOfIndexedInputs(1);
   this->SetNumberOfRequiredInputs(1);
 
   m_Conf.Pitch = 0.0003;
   m_Conf.SpeedOfSound = 1540;
   m_Conf.SamplesPerLine = 2048;
   m_Conf.ReconstructionLines = 128;
   m_Conf.RecordTime = 0.00006;
   m_Conf.TransducerElements = 128;
 }
 
 mitk::BeamformingDMASFilter::~BeamformingDMASFilter()
 {
 }
 
 void mitk::BeamformingDMASFilter::GenerateInputRequestedRegion()
 {
   Superclass::GenerateInputRequestedRegion();
 
   mitk::Image* output = this->GetOutput();
   mitk::Image* input = const_cast< mitk::Image * > (this->GetInput());
   if (!output->IsInitialized())
   {
     return;
   }
 
   input->SetRequestedRegionToLargestPossibleRegion();
 
   //GenerateTimeInInputRegion(output, input);
 }
 
 void mitk::BeamformingDMASFilter::GenerateOutputInformation()
 {
   mitk::Image::ConstPointer input = this->GetInput();
   mitk::Image::Pointer output = this->GetOutput();
 
   if ((output->IsInitialized()) && (this->GetMTime() <= m_TimeOfHeaderInitialization.GetMTime()))
     return;
 
   itkDebugMacro(<< "GenerateOutputInformation()");
 
   unsigned int dim[] = { m_Conf.ReconstructionLines, m_Conf.SamplesPerLine, input->GetDimension(2) };
   output->Initialize(mitk::MakeScalarPixelType<double>(), 3, dim);
 
   mitk::Vector3D spacing;
   spacing[0] = m_Conf.Pitch * m_Conf.TransducerElements * 1000 / m_Conf.ReconstructionLines;
   spacing[1] = m_Conf.RecordTime * m_Conf.SpeedOfSound / 2 * 1000 / m_Conf.SamplesPerLine;
   spacing[2] = 1;
 
   output->GetGeometry()->SetSpacing(spacing);
   output->GetGeometry()->Modified();
   output->SetPropertyList(input->GetPropertyList()->Clone());
 
   m_TimeOfHeaderInitialization.Modified();
 }
 
 void mitk::BeamformingDMASFilter::GenerateData()
 {
   mitk::Image::ConstPointer input = this->GetInput();
   mitk::Image::Pointer output = this->GetOutput();
 
   float inputS = input->GetDimension(1);
   float inputL = input->GetDimension(0);
 
   float outputS = output->GetDimension(1);
   float outputL = output->GetDimension(0);
 
   float part = 0.07 * inputL;
 
   if (!output->IsInitialized())
   {
     return;
   }
 
   auto begin = std::chrono::high_resolution_clock::now(); // debbuging the performance...
 
   for (int i = 0; i < output->GetDimension(2); ++i) // seperate Slices should get Beamforming seperately applied
   {
     mitk::ImageReadAccessor inputReadAccessor(input, input->GetSliceData(i));
 
     m_OutputData = new double[m_Conf.ReconstructionLines*m_Conf.SamplesPerLine];
     m_InputDataPuffer = new double[input->GetDimension(0)*input->GetDimension(1)];
 
     if (input->GetPixelType().GetTypeAsString() == "scalar (double)")
     {
       m_InputData = (double*)inputReadAccessor.GetData();
     }
     else if (input->GetPixelType().GetTypeAsString() == "scalar (short)")
     {
       short* InputPuffer = (short*)inputReadAccessor.GetData();
       for (int l = 0; l < inputL; ++l)
       {
         for (int s = 0; s < inputS; ++s)
         {
           m_InputDataPuffer[l*(unsigned short)inputS + s] = (double)InputPuffer[l*(unsigned short)inputS + s];
         }
       }
       m_InputData = m_InputDataPuffer;
     }
 
     for (int l = 0; l < outputL; ++l)
     {
       for (int s = 0; s < outputS; ++s)
       {
         m_OutputData[l*(unsigned short)outputS + s] = 0;
       }
     }
 
     unsigned short AddSample1 = 0;
     unsigned short AddSample2 = 0;
     unsigned short maxLine = 0;
     unsigned short minLine = 0;
     float delayMultiplicator = 0;
     float l_i = 0;
     float s_i = 0;
 
     float l = 0;
     float x = 0;
     float root = 0;
 
     float mult = 0;
 
     if (m_Conf.DelayCalculationMethod == beamformingSettings::DelayCalc::Linear)
     {
       //linear delay
       for (unsigned short line = 0; line < outputL; ++line)
       {
         l_i = line / outputL * inputL;
 
         maxLine = (unsigned short)std::min((l_i + part) + 1, inputL);
         minLine = (unsigned short)std::max((l_i - part), 0.0f);
 
         l = (inputL / 2 - l_i) / inputL*m_Conf.Pitch*m_Conf.TransducerElements;
 
         for (unsigned short sample = 0; sample < outputS; ++sample)
         {
           s_i = sample / outputS * inputS;
 
           x = m_Conf.RecordTime / inputS * s_i * m_Conf.SpeedOfSound;
           root = l / sqrt(pow(l, 2) + pow(m_Conf.RecordTime / inputS * s_i * m_Conf.SpeedOfSound, 2));
           delayMultiplicator = root / (m_Conf.RecordTime*m_Conf.SpeedOfSound) *m_Conf.Pitch*m_Conf.TransducerElements / inputL;
 
           for (unsigned short l_s1 = minLine; l_s1 < maxLine-1; ++l_s1)
           {
             AddSample1 = delayMultiplicator * (l_s1 - l_i) + s_i;
             if (AddSample1 < inputS && AddSample1 >= 0)
             {
               for (unsigned short l_s2 = l_s1 + 1; l_s2 < maxLine; ++l_s2)
               {
                 AddSample2 = delayMultiplicator * (l_s2 - l_i) + s_i;
                 if (AddSample2 < inputS && AddSample2 >= 0)
                 {
                   mult = m_InputData[l_s2 + AddSample2*(unsigned short)inputL] * m_InputData[l_s1 + AddSample1*(unsigned short)inputL];
                   m_OutputData[sample*(unsigned short)outputL + line] += sqrt(abs(mult)) * ((mult > 0) - (mult < 0));
                 }
               }
             }
           }
         }
       }
-    }/*
+    }
     else if (m_Conf.DelayCalculationMethod == beamformingSettings::DelayCalc::QuadApprox)
     {
       //quadratic delay
       for (unsigned short line = 0; line < outputL; ++line)
       {
         l_i = line / outputL * inputL;
 
         maxLine = (unsigned short)std::min((l_i + part) + 1, inputL);
         minLine = (unsigned short)std::max((l_i - part), 0.0f);
 
         for (unsigned short sample = 0; sample < outputS; ++sample)
         {
           s_i = sample / outputS * inputS;
           delayMultiplicator = pow((inputS / (m_Conf.RecordTime*m_Conf.SpeedOfSound) * (m_Conf.Pitch*m_Conf.TransducerElements) / inputL), 2) / s_i;
 
-          for (unsigned short l_s = minLine; l_s < maxLine; ++l_s)
+          for (unsigned short l_s1 = minLine; l_s1 < maxLine - 1; ++l_s1)
           {
-            AddSample = delayMultiplicator * pow((l_s - l_i), 2) + s_i;
-            if (AddSample < inputS && AddSample >= 0) {
-              m_OutputData[sample*(unsigned short)outputL + line] += m_InputData[l_s + AddSample*(unsigned short)inputL];
+            AddSample1 = delayMultiplicator * pow((l_s1 - l_i), 2) + s_i;
+            if (AddSample1 < inputS && AddSample1 >= 0)
+            {
+              for (unsigned short l_s2 = l_s1 + 1; l_s2 < maxLine; ++l_s2)
+              {
+                AddSample2 = delayMultiplicator * pow((l_s2 - l_i), 2) + s_i;
+                if (AddSample2 < inputS && AddSample2 >= 0)
+                {
+                  mult = m_InputData[l_s2 + AddSample2*(unsigned short)inputL] * m_InputData[l_s1 + AddSample1*(unsigned short)inputL];
+                  m_OutputData[sample*(unsigned short)outputL + line] += sqrt(abs(mult)) * ((mult > 0) - (mult < 0));
+                }
+              }
             }
           }
         }
       }
     }
     else if (m_Conf.DelayCalculationMethod == beamformingSettings::DelayCalc::Spherical)
     {
       //exact delay
       for (unsigned short line = 0; line < outputL; ++line)
       {
 
         l_i = line / outputL * inputL;
 
         maxLine = (unsigned short)std::min((l_i + part) + 1, inputL);
         minLine = (unsigned short)std::max((l_i - part), 0.0f);
 
         for (unsigned short sample = 0; sample < outputS; ++sample)
         {
           s_i = sample / outputS * inputS;
 
-          for (unsigned short l_s = minLine; l_s < maxLine; ++l_s)
+          for (unsigned short l_s1 = minLine; l_s1 < maxLine - 1; ++l_s1)
           {
-            AddSample = (int)sqrt(
+            AddSample1 = (int)sqrt(
               pow(s_i, 2)
               +
-              pow((inputS / (m_Conf.RecordTime*m_Conf.SpeedOfSound) * ((l_s - l_i)*m_Conf.Pitch*m_Conf.TransducerElements) / inputL), 2)
+              pow((inputS / (m_Conf.RecordTime*m_Conf.SpeedOfSound) * ((l_s1 - l_i)*m_Conf.Pitch*m_Conf.TransducerElements) / inputL), 2)
             );
-            if (AddSample < inputS && AddSample >= 0) {
-              m_OutputData[sample*(unsigned short)outputL + line] += m_InputData[l_s + AddSample*(unsigned short)inputL];
-              //MITK_INFO<< m_InputData[l_s + AddSample*(int)inputL];
+            if (AddSample1 < inputS && AddSample1 >= 0)
+            {
+              for (unsigned short l_s2 = l_s1 + 1; l_s2 < maxLine; ++l_s2)
+              {
+                AddSample2 = (int)sqrt(
+                  pow(s_i, 2)
+                  +
+                  pow((inputS / (m_Conf.RecordTime*m_Conf.SpeedOfSound) * ((l_s2 - l_i)*m_Conf.Pitch*m_Conf.TransducerElements) / inputL), 2)
+                );
+                if (AddSample2 < inputS && AddSample2 >= 0)
+                {
+                  mult = m_InputData[l_s2 + AddSample2*(unsigned short)inputL] * m_InputData[l_s1 + AddSample1*(unsigned short)inputL];
+                  m_OutputData[sample*(unsigned short)outputL + line] += sqrt(abs(mult)) * ((mult > 0) - (mult < 0));
+                }
+              }
             }
           }
         }
       }
-    }*/
+    }
 
     output->SetSlice(m_OutputData, i);
 
     delete[] m_OutputData;
     delete[] m_InputDataPuffer;
     m_OutputData = nullptr;
     m_InputData = nullptr;
   }
+
+  mitk::Image::Pointer BP = BandpassFilter(output);
+
+  for (int i = 0; i < output->GetDimension(2); ++i)
+  {
+    mitk::ImageReadAccessor copy(BP, BP->GetSliceData(i));
+    output->SetSlice(copy.GetData(), i);
+  }
+
   m_TimeOfHeaderInitialization.Modified();
 
   auto end = std::chrono::high_resolution_clock::now();
   MITK_INFO << "Beamforming completed in " << ((float)std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin).count()) / 1000000 << "ms" << std::endl;
 }
 
 void mitk::BeamformingDMASFilter::Configure(beamformingSettings settings)
 {
   m_Conf = settings;
+}
+
+mitk::Image::Pointer mitk::BeamformingDMASFilter::BandpassFilter(mitk::Image::Pointer data)
+{
+  typedef double PixelType;
+  typedef itk::Image< PixelType, 3 > RealImageType;
+  RealImageType::Pointer image;
+
+  mitk::CastToItkImage(data, image);
+
+  typedef itk::FFT1DRealToComplexConjugateImageFilter<RealImageType> ForwardFFTFilterType;
+  typedef ForwardFFTFilterType::OutputImageType ComplexImageType;
+  ForwardFFTFilterType::Pointer forwardFFTFilter = ForwardFFTFilterType::New();
+  forwardFFTFilter->SetInput(image);
+  forwardFFTFilter->SetDirection(1);
+  try
+  {
+    forwardFFTFilter->UpdateOutputInformation();
+  }
+  catch (itk::ExceptionObject & error)
+  {
+    std::cerr << "Error: " << error << std::endl;
+  }
+  /*itk::ComplexToModulusImageFilter<ComplexImageType, RealImageType>::Pointer toReal = itk::ComplexToModulusImageFilter<ComplexImageType, RealImageType>::New();
+  toReal->SetInput(forwardFFTFilter->GetOutput());
+  return GrabItkImageMemory(toReal->GetOutput());*/
+
+  // A Gaussian is used here to create a low-pass filter.
+  typedef itk::GaussianImageSource< RealImageType > GaussianSourceType;
+  GaussianSourceType::Pointer gaussianSource = GaussianSourceType::New();
+  gaussianSource->SetNormalized(true);
+  ComplexImageType::ConstPointer transformedInput
+    = forwardFFTFilter->GetOutput();
+  const ComplexImageType::RegionType inputRegion(
+    transformedInput->GetLargestPossibleRegion());
+  const ComplexImageType::SizeType inputSize
+    = inputRegion.GetSize();
+  const ComplexImageType::SpacingType inputSpacing =
+    transformedInput->GetSpacing();
+  const ComplexImageType::PointType inputOrigin =
+    transformedInput->GetOrigin();
+  const ComplexImageType::DirectionType inputDirection =
+    transformedInput->GetDirection();
+  gaussianSource->SetSize(inputSize);
+  gaussianSource->SetSpacing(inputSpacing);
+  gaussianSource->SetOrigin(inputOrigin);
+  gaussianSource->SetDirection(inputDirection);
+  GaussianSourceType::ArrayType sigma;
+  GaussianSourceType::PointType mean;
+
+  MITK_INFO<< "spacing " << inputSpacing[0] << " " << inputSpacing[1] << " " << inputSpacing[2];
+
+  double sigmaValue = 0.5;
+  sigma.Fill(sigmaValue);
+  for (unsigned int ii = 0; ii < 3; ++ii)
+  {
+    const double halfLength = inputSize[ii] * inputSpacing[ii] / 2.0;
+    sigma[ii] *= halfLength;
+    mean[ii] = inputOrigin[ii] + halfLength;
+  }
+  mean = inputDirection * mean;
+  gaussianSource->SetSigma(sigma);
+  gaussianSource->SetMean(mean);
+
+  typedef itk::FFTShiftImageFilter< RealImageType, RealImageType > FFTShiftFilterType;
+  FFTShiftFilterType::Pointer fftShiftFilter = FFTShiftFilterType::New();
+  fftShiftFilter->SetInput(gaussianSource->GetOutput());
+
+  typedef itk::MultiplyImageFilter< ComplexImageType,
+    RealImageType,
+    ComplexImageType >
+    MultiplyFilterType;
+  MultiplyFilterType::Pointer multiplyFilter = MultiplyFilterType::New();
+  multiplyFilter->SetInput1(forwardFFTFilter->GetOutput());
+  multiplyFilter->SetInput2(fftShiftFilter->GetOutput());
+
+  typedef itk::FFT1DComplexConjugateToRealImageFilter< ComplexImageType, RealImageType > InverseFilterType;
+  InverseFilterType::Pointer inverseFFTFilter = InverseFilterType::New();
+  inverseFFTFilter->SetInput(multiplyFilter->GetOutput());
+  inverseFFTFilter->SetDirection(1);
+
+  return GrabItkImageMemory(inverseFFTFilter->GetOutput());
 }
\ No newline at end of file
diff --git a/Modules/PhotoacousticsAlgorithms/Algorithms/mitkPhotoacousticBeamformingDMASFilter.h b/Modules/PhotoacousticsAlgorithms/Algorithms/mitkPhotoacousticBeamformingDMASFilter.h
index 956a3a05fd..b68b083388 100644
--- a/Modules/PhotoacousticsAlgorithms/Algorithms/mitkPhotoacousticBeamformingDMASFilter.h
+++ b/Modules/PhotoacousticsAlgorithms/Algorithms/mitkPhotoacousticBeamformingDMASFilter.h
@@ -1,75 +1,77 @@
 /*===================================================================
 
 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.
 
 ===================================================================*/
 
 
 #ifndef MITK_PHOTOACOUSTICS_BEAMFORMING_DMAS_FILTER
 #define MITK_PHOTOACOUSTICS_BEAMFORMING_DMAS_FILTER
 
 #include "mitkImageToImageFilter.h"
 
 namespace mitk {
 
   //##Documentation
   //## @brief
   //## @ingroup Process
   class BeamformingDMASFilter : public ImageToImageFilter
   {
   public:
     mitkClassMacro(BeamformingDMASFilter, ImageToImageFilter);
 
     itkFactorylessNewMacro(Self)
       itkCloneMacro(Self)
 
     struct beamformingSettings
     {
       double Pitch = 0.0003; // [m]
       float SpeedOfSound = 1540; // [m/s]
       unsigned int SamplesPerLine = 2048;
       unsigned int ReconstructionLines = 128;
       double RecordTime = 0.00006; // [s]
       unsigned int TransducerElements = 128;
       enum DelayCalc { Linear, QuadApprox, Spherical };
       DelayCalc DelayCalculationMethod = QuadApprox;
     };
 
     void Configure(beamformingSettings settings);
 
   protected:
 
     BeamformingDMASFilter();
 
     ~BeamformingDMASFilter();
 
     virtual void GenerateInputRequestedRegion() override;
 
     virtual void GenerateOutputInformation() override;
 
     virtual void GenerateData() override;
 
     //##Description
     //## @brief Time when Header was last initialized
     itk::TimeStamp m_TimeOfHeaderInitialization;
 
+    mitk::Image::Pointer BandpassFilter(mitk::Image::Pointer data);
+
     double* m_OutputData;
     double* m_InputData;
     double* m_InputDataPuffer;
 
     beamformingSettings m_Conf;
   };
 
 } // namespace mitk
 
 #endif MITK_PHOTOACOUSTICS_BEAMFORMING_DMAS_FILTER