+
+//--------------------------------------------------------------------
+template <class ImageType, class MaskImageType>
+bool
+clitk::ExtractLungFilter<ImageType, MaskImageType>::
+SearchForTracheaSeed(int skip)
+{
+ if (m_Seeds.size() == 0) { // try to find seed (if not zero, it is given by user)
+ // Restart the search until a seed is found, skipping more and more slices
+ bool stop = false;
+ while (!stop) {
+ // Search seed (parameters = UpperThresholdForTrachea)
+ static const unsigned int Dim = ImageType::ImageDimension;
+ typename InternalImageType::RegionType sliceRegion = working_input->GetLargestPossibleRegion();
+ typename InternalImageType::SizeType sliceRegionSize = sliceRegion.GetSize();
+ typename InternalImageType::IndexType sliceRegionIndex = sliceRegion.GetIndex();
+ sliceRegionIndex[Dim-1]=sliceRegionSize[Dim-1]-skip-5;
+ sliceRegionSize[Dim-1]=5;
+ sliceRegion.SetSize(sliceRegionSize);
+ sliceRegion.SetIndex(sliceRegionIndex);
+ typedef itk::ImageRegionConstIterator<ImageType> IteratorType;
+ IteratorType it(working_input, sliceRegion);
+ it.GoToBegin();
+ while (!it.IsAtEnd()) {
+ if(it.Get() < GetUpperThresholdForTrachea() ) {
+ AddSeed(it.GetIndex());
+ // DD(it.GetIndex());
+ }
+ ++it;
+ }
+
+ // if we do not found : restart
+ stop = (m_Seeds.size() != 0);
+ if (!stop) {
+ if (GetVerboseStep()) {
+ std::cout << "\t No seed found this time. I skip some slices and restart." << std::endl;
+ }
+ if (skip > 0.5 * working_input->GetLargestPossibleRegion().GetSize()[2]) {
+ // we want to skip more than a half of the image, it is probably a bug
+ std::cerr << "Number of slices to skip to find trachea to high = " << skip << std::endl;
+ stop = true;
+ }
+ skip += 5;
+ }
+ }
+ }
+ return (m_Seeds.size() != 0);
+}
+//--------------------------------------------------------------------
+
+
+//--------------------------------------------------------------------
+template <class ImageType, class MaskImageType>
+void
+clitk::ExtractLungFilter<ImageType, MaskImageType>::
+TracheaRegionGrowing()
+{
+ // Explosion controlled region growing
+ typedef clitk::ExplosionControlledThresholdConnectedImageFilter<ImageType, InternalImageType> ImageFilterType;
+ typename ImageFilterType::Pointer f= ImageFilterType::New();
+ f->SetInput(working_input);
+ f->SetVerbose(false);
+ f->SetLower(-2000);
+ f->SetUpper(GetUpperThresholdForTrachea());
+ f->SetMinimumLowerThreshold(-2000);
+ f->SetMaximumUpperThreshold(0);
+ f->SetAdaptLowerBorder(false);
+ f->SetAdaptUpperBorder(true);
+ f->SetMinimumSize(5000);
+ f->SetReplaceValue(1);
+ f->SetMultiplier(GetMultiplierForTrachea());
+ f->SetThresholdStepSize(GetThresholdStepSizeForTrachea());
+ f->SetMinimumThresholdStepSize(1);
+ for(unsigned int i=0; i<m_Seeds.size();i++) {
+ f->AddSeed(m_Seeds[i]);
+ // DD(m_Seeds[i]);
+ }
+ f->Update();
+
+ // take first (main) connected component
+ writeImage<InternalImageType>(f->GetOutput(), "t1.mhd");
+ trachea_tmp = Labelize<InternalImageType>(f->GetOutput(),
+ GetBackgroundValue(),
+ true,
+ GetMinimalComponentSize());
+ writeImage<InternalImageType>(trachea_tmp, "t2.mhd");
+ trachea_tmp = KeepLabels<InternalImageType>(trachea_tmp,
+ GetBackgroundValue(),
+ GetForegroundValue(),
+ 1, 1, false);
+ writeImage<InternalImageType>(trachea_tmp, "t3.mhd");
+}
+//--------------------------------------------------------------------
+
+
+//--------------------------------------------------------------------
+template <class ImageType, class MaskImageType>
+double
+clitk::ExtractLungFilter<ImageType, MaskImageType>::
+ComputeTracheaVolume()
+{
+ typedef itk::ImageRegionConstIterator<InternalImageType> IteratorType;
+ IteratorType iter(trachea_tmp, trachea_tmp->GetLargestPossibleRegion());
+ iter.GoToBegin();
+ double volume = 0.0;
+ while (!iter.IsAtEnd()) {
+ if (iter.Get() == this->GetForegroundValue()) volume++;
+ ++iter;
+ }
+
+ double voxelsize = trachea_tmp->GetSpacing()[0]*trachea_tmp->GetSpacing()[1]*trachea_tmp->GetSpacing()[2];
+ return volume*voxelsize;
+}
+//--------------------------------------------------------------------
+
+
+//--------------------------------------------------------------------
+template <class ImageType, class MaskImageType>
+void
+clitk::ExtractLungFilter<ImageType, MaskImageType>::
+SearchForTrachea()
+{
+ // Search for seed among n slices, skip some slices before starting
+ // if not found -> skip more and restart