Authors belong to:
- University of LYON http://www.universite-lyon.fr/
- - Léon Bérard cancer center http://oncora1.lyon.fnclcc.fr
+ - Léon Bérard cancer center http://www.centreleonberard.fr
- CREATIS CNRS laboratory http://www.creatis.insa-lyon.fr
This software is distributed WITHOUT ANY WARRANTY; without even
- BSD See included LICENSE.txt file
- CeCILL-B http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.html
- ======================================================================-====*/
+ ===========================================================================**/
#ifndef CLITKEXTRACTLUNGSFILTER_TXX
#define CLITKEXTRACTLUNGSFILTER_TXX
#include "clitkSetBackgroundImageFilter.h"
#include "clitkSegmentationUtils.h"
#include "clitkAutoCropFilter.h"
+#include "clitkCropLikeImageFilter.h"
+#include "clitkFillMaskFilter.h"
+#include "clitkMemoryUsage.h"
// itk
#include "itkBinaryThresholdImageFilter.h"
#include "itkConnectedComponentImageFilter.h"
#include "itkRelabelComponentImageFilter.h"
#include "itkOtsuThresholdImageFilter.h"
+#include "itkBinaryThinningImageFilter3D.h"
+#include "itkImageIteratorWithIndex.h"
+#include "itkBinaryMorphologicalOpeningImageFilter.h"
+#include "itkBinaryMorphologicalClosingImageFilter.h"
+#include "itkConstantPadImageFilter.h"
+#include <itkBinaryBallStructuringElement.h>
+#include "itkStatisticsLabelObject.h"
+#include "itkLabelMap.h"
+#include "itkLabelImageToShapeLabelMapFilter.h"
+#include "itkLabelMapToLabelImageFilter.h"
+#include "itkExtractImageFilter.h"
+#include "itkOrientImageFilter.h"
+#include "itkSpatialOrientationAdapter.h"
+#include "itkImageDuplicator.h"
+#include "itkRelabelComponentImageFilter.h"
+
+#include <fcntl.h>
//--------------------------------------------------------------------
-template <class TInputImageType, class TMaskImageType>
-clitk::ExtractLungFilter<TInputImageType, TMaskImageType>::
+template <class ImageType>
+clitk::ExtractLungFilter<ImageType>::
ExtractLungFilter():
clitk::FilterBase(),
- itk::ImageToImageFilter<TInputImageType, TMaskImageType>()
+ clitk::FilterWithAnatomicalFeatureDatabaseManagement(),
+ itk::ImageToImageFilter<ImageType, MaskImageType>()
{
+ SetNumberOfSteps(10);
+ m_MaxSeedNumber = 500;
+
// Default global options
- this->SetNumberOfRequiredInputs(2);
+ this->SetNumberOfRequiredInputs(1);
SetPatientMaskBackgroundValue(0);
SetBackgroundValue(0); // Must be zero
SetForegroundValue(1);
+ SetMinimalComponentSize(100);
+ VerboseRegionGrowingFlagOff();
+ RemoveSmallLabelBeforeSeparationFlagOn();
// Step 1 default values
SetUpperThreshold(-300);
SetLabelizeParameters1(p1);
// Step 2 default values
- SetUpperThresholdForTrachea(-900);
+ SetTracheaSeedAlgorithm(0);
+ SetUpperThresholdForTrachea(-700);
SetMultiplierForTrachea(5);
SetThresholdStepSizeForTrachea(64);
+ SetNumberOfSlicesToSkipBeforeSearchingSeed(0);
+ TracheaVolumeMustBeCheckedFlagOn();
+ SetNumSlices(50);
+ SetMaxElongation(0.5);
+ SetSeedPreProcessingThreshold(-400);
+
// Step 3 default values
SetNumberOfHistogramBins(500);
p3->SetLastKeep(2);
p3->UseLastKeepOff();
SetLabelizeParameters3(p3);
+
+ // Step 5
+ OpenCloseFlagOff();
+ SetOpenCloseRadius(1);
+
+ // Step 6
+ FillHolesFlagOn();
+ AutoCropOn();
}
//--------------------------------------------------------------------
//--------------------------------------------------------------------
-template <class TInputImageType, class TMaskImageType>
-void
-clitk::ExtractLungFilter<TInputImageType, TMaskImageType>::
-SetInput(const TInputImageType * image)
-{
- this->SetNthInput(0, const_cast<TInputImageType *>(image));
-}
-//--------------------------------------------------------------------
-
-
-//--------------------------------------------------------------------
-template <class TInputImageType, class TMaskImageType>
+template <class ImageType>
void
-clitk::ExtractLungFilter<TInputImageType, TMaskImageType>::
-SetInputPatientMask(TMaskImageType * image, MaskImagePixelType bg )
+clitk::ExtractLungFilter<ImageType>::
+SetInput(const ImageType * image)
{
- this->SetNthInput(1, const_cast<TMaskImageType *>(image));
- SetPatientMaskBackgroundValue(bg);
+ this->SetNthInput(0, const_cast<ImageType *>(image));
}
//--------------------------------------------------------------------
//--------------------------------------------------------------------
-template <class TInputImageType, class TMaskImageType>
+template <class ImageType>
void
-clitk::ExtractLungFilter<TInputImageType, TMaskImageType>::
+clitk::ExtractLungFilter<ImageType>::
AddSeed(InternalIndexType s)
{
m_Seeds.push_back(s);
//--------------------------------------------------------------------
-template <class TInputImageType, class TMaskImageType>
-template<class ArgsInfoType>
+template <class ImageType>
void
-clitk::ExtractLungFilter<TInputImageType, TMaskImageType>::
-SetArgsInfo(ArgsInfoType mArgsInfo)
-{
- SetVerboseOption_GGO(mArgsInfo);
- SetVerboseStep_GGO(mArgsInfo);
- SetWriteStep_GGO(mArgsInfo);
- SetVerboseWarningOff_GGO(mArgsInfo);
-
- SetUpperThreshold_GGO(mArgsInfo);
- SetLowerThreshold_GGO(mArgsInfo);
- SetLabelizeParameters1_GGO(mArgsInfo);
- if (!mArgsInfo.remove1_given) {
- GetLabelizeParameters1()->AddLabelToRemove(2);
- if (GetVerboseOption()) VerboseOption("remove1", 2);
- }
-
- SetUpperThresholdForTrachea_GGO(mArgsInfo);
- SetMultiplierForTrachea_GGO(mArgsInfo);
- SetThresholdStepSizeForTrachea_GGO(mArgsInfo);
- AddSeed_GGO(mArgsInfo);
-
- SetNumberOfHistogramBins_GGO(mArgsInfo);
- SetLabelizeParameters2_GGO(mArgsInfo);
-
- SetRadiusForTrachea_GGO(mArgsInfo);
- SetLabelizeParameters3_GGO(mArgsInfo);
-}
-//--------------------------------------------------------------------
-
-
-//--------------------------------------------------------------------
-template <class TInputImageType, class TMaskImageType>
-void
-clitk::ExtractLungFilter<TInputImageType, TMaskImageType>::
+clitk::ExtractLungFilter<ImageType>::
GenerateOutputInformation()
{
- input = dynamic_cast<const TInputImageType*>(itk::ProcessObject::GetInput(0));
+ clitk::PrintMemory(GetVerboseMemoryFlag(), "Initial memory"); // OK
Superclass::GenerateOutputInformation();
-// MaskImagePointer output = this->GetOutput(0);
+
+ // Read DB
+ LoadAFDB();
// Get input pointers
- input = dynamic_cast<const TInputImageType*>(itk::ProcessObject::GetInput(0));
- patient = dynamic_cast<const TMaskImageType*>(itk::ProcessObject::GetInput(1));
+ input = dynamic_cast<const ImageType*>(itk::ProcessObject::GetInput(0));
+ patient = GetAFDB()->template GetImage <MaskImageType>("Patient");
+ PrintMemory(GetVerboseMemoryFlag(), "After reading patient"); // OK
+
+ //--------------------------------------------------------------------
+ //--------------------------------------------------------------------
+ // Crop input like patient image (must have the same spacing)
+ // It copy the input if the same are the same
+ StartNewStep("Copy and crop input image to 'patient' extends");
+ typedef clitk::CropLikeImageFilter<ImageType> CropImageFilter;
+ typename CropImageFilter::Pointer cropFilter = CropImageFilter::New();
+ // cropFilter->ReleaseDataFlagOn(); // NO=seg fault !!
+ cropFilter->SetInput(input);
+ cropFilter->SetCropLikeImage(patient);
+ cropFilter->Update();
+ working_input = cropFilter->GetOutput();
+ // cropFilter->Delete(); // NO !!!! if yes, sg fault, Cropfilter is buggy !??
+ StopCurrentStep<ImageType>(working_input);
+ PrintMemory(GetVerboseMemoryFlag(), "After crop"); // OK, slightly more than a copy of input
- // Check image
- if (!HaveSameSizeAndSpacing<TInputImageType, TMaskImageType>(input, patient)) {
- this->SetLastError("* ERROR * the images (input and patient mask) must have the same size & spacing");
- return;
- }
-
//--------------------------------------------------------------------
//--------------------------------------------------------------------
StartNewStep("Set background to initial image");
- working_input = SetBackground<TInputImageType, TMaskImageType>
- (input, patient, GetPatientMaskBackgroundValue(), -1000);
- StopCurrentStep<InputImageType>(working_input);
+ working_input = SetBackground<ImageType, MaskImageType>
+ (working_input, patient, GetPatientMaskBackgroundValue(), -1000, true);
+
+ // Pad images with air to prevent patient touching the image border
+ static const unsigned int Dim = ImageType::ImageDimension;
+ typedef itk::ConstantPadImageFilter<ImageType, ImageType> PadFilterType;
+ typename PadFilterType::Pointer padFilter = PadFilterType::New();
+ padFilter->SetInput(working_input);
+ padFilter->SetConstant(-1000);
+ typename ImageType::SizeType bounds;
+ for (unsigned i = 0; i < Dim - 1; ++i)
+ bounds[i] = 1;
+ bounds[Dim - 1] = 0;
+ padFilter->SetPadLowerBound(bounds);
+ padFilter->SetPadUpperBound(bounds);
+ padFilter->Update();
+ working_input = padFilter->GetOutput();
+
+ StopCurrentStep<ImageType>(working_input);
+ PrintMemory(GetVerboseMemoryFlag(), "After set bg"); // OK, additional mem = 0
+
+ /*
+ // We do not need patient mask anymore, release memory
+ GetAFDB()->template ReleaseImage<MaskImageType>("Patient");
+ DD(patient->GetReferenceCount());
+ PrintMemory(GetVerboseMemoryFlag(), "After delete patient"); // OK, additional mem = 0
+ patient->Delete();
+ PrintMemory(GetVerboseMemoryFlag(), "After delete patient"); // OK, additional mem = 0
+ */
//--------------------------------------------------------------------
//--------------------------------------------------------------------
StartNewStep("Remove Air");
+ // Check threshold
+ if (m_UseLowerThreshold) {
+ if (m_LowerThreshold > m_UpperThreshold) {
+ clitkExceptionMacro("lower threshold cannot be greater than upper threshold.");
+ }
+ }
// Threshold to get air
- typedef itk::BinaryThresholdImageFilter<InputImageType, InternalImageType> InputBinarizeFilterType;
- typename InputBinarizeFilterType::Pointer binarizeFilter=InputBinarizeFilterType::New();
+ typedef itk::BinaryThresholdImageFilter<ImageType, MaskImageType> InputBinarizeFilterType;
+ typename InputBinarizeFilterType::Pointer binarizeFilter = InputBinarizeFilterType::New();
binarizeFilter->SetInput(working_input);
if (m_UseLowerThreshold) binarizeFilter->SetLowerThreshold(m_LowerThreshold);
+ // binarizeFilter->CanRunInPlace() is false
binarizeFilter->SetUpperThreshold(m_UpperThreshold);
- binarizeFilter ->SetInsideValue(this->GetForegroundValue());
- binarizeFilter ->SetOutsideValue(this->GetBackgroundValue());
+ binarizeFilter->SetInsideValue(this->GetForegroundValue());
+ binarizeFilter->SetOutsideValue(this->GetBackgroundValue());
binarizeFilter->Update();
- working_image = binarizeFilter->GetOutput();
-
+ working_mask = binarizeFilter->GetOutput();
+ PrintMemory(GetVerboseMemoryFlag(), "After Binarizefilter"); // OK, additional mem is one mask image
+
// Labelize and keep right labels
- working_image = Labelize<InternalImageType>(working_image, GetBackgroundValue(), true, GetMinimalComponentSize());
- working_image = RemoveLabels<InternalImageType>
- (working_image, GetBackgroundValue(), GetLabelizeParameters1()->GetLabelsToRemove());
- typename InternalImageType::Pointer air = KeepLabels<InternalImageType>
- (working_image,
+ working_mask =
+ Labelize<MaskImageType>
+ (working_mask, GetBackgroundValue(), true, GetMinimalComponentSize());
+ PrintMemory(GetVerboseMemoryFlag(), "After Labelize"); // BUG ? additional mem around 1 time the input ?
+
+ working_mask = RemoveLabels<MaskImageType>
+ (working_mask, GetBackgroundValue(), GetLabelizeParameters1()->GetLabelsToRemove());
+ PrintMemory(GetVerboseMemoryFlag(), "After RemoveLabels"); // OK additional mem = 0
+
+ working_mask = KeepLabels<MaskImageType>
+ (working_mask,
GetBackgroundValue(),
GetForegroundValue(),
GetLabelizeParameters1()->GetFirstKeep(),
GetLabelizeParameters1()->GetLastKeep(),
GetLabelizeParameters1()->GetUseLastKeep());
+ PrintMemory(GetVerboseMemoryFlag(), "After KeepLabels to create the 'air'");
// Set Air to BG
- working_input = SetBackground<TInputImageType, InternalImageType>
- (working_input, air, this->GetForegroundValue(), this->GetBackgroundValue());
+ working_input = SetBackground<ImageType, MaskImageType>
+ (working_input, working_mask, this->GetForegroundValue(), this->GetBackgroundValue(), true);
+ PrintMemory(GetVerboseMemoryFlag(), "After SetBackground");
// End
- StopCurrentStep<InputImageType>(working_input);
+ StopCurrentStep<ImageType>(working_input);
//--------------------------------------------------------------------
//--------------------------------------------------------------------
- StartNewStep("Find the trachea");
- //DD(m_Seeds.size());
- if (m_Seeds.size() == 0) { // try to find seed
- // Search seed (parameters = UpperThresholdForTrachea)
- static const unsigned int Dim = InputImageType::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]-5;
- sliceRegionSize[Dim-1]=5;
- sliceRegion.SetSize(sliceRegionSize);
- sliceRegion.SetIndex(sliceRegionIndex);
- //DD(GetUpperThresholdForTrachea());
- //DD(sliceRegion);
- typedef itk::ImageRegionConstIterator<InputImageType> IteratorType;
- IteratorType it(working_input, sliceRegion);
- it.GoToBegin();
- while (!it.IsAtEnd()) {
- if(it.Get() < GetUpperThresholdForTrachea() ) {
- AddSeed(it.GetIndex());
- // DD(it.GetIndex());
- }
- ++it;
- }
- }
-
- //DD(m_Seeds.size());
- if (m_Seeds.size() != 0) {
- // Explosion controlled region growing
- typedef clitk::ExplosionControlledThresholdConnectedImageFilter<InputImageType, 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++) {
- // std::cout<<"Adding seed " <<m_Seeds[i]<<"..."<<std::endl;
- f->AddSeed(m_Seeds[i]);
- }
- f->Update();
- trachea_tmp = f->GetOutput();
- // Set output
- StopCurrentStep<InternalImageType>(trachea_tmp);
-
- }
- else { // Trachea not found
- this->SetWarning("* WARNING * No seed found for trachea.");
- // Set output
- StopCurrentStep();
+ StartNewStep("Search for the trachea");
+ SearchForTrachea();
+ PrintMemory(GetVerboseMemoryFlag(), "After SearchForTrachea");
+ if (m_Seeds.empty()) {
+ clitkExceptionMacro("No seeds for trachea... Aborting.");
}
//--------------------------------------------------------------------
//--------------------------------------------------------------------
StartNewStep("Extract the lung with Otsu filter");
// Automated Otsu thresholding and relabeling
- typedef itk::OtsuThresholdImageFilter<InputImageType,InternalImageType> OtsuThresholdImageFilterType;
+ typedef itk::OtsuThresholdImageFilter<ImageType,MaskImageType> OtsuThresholdImageFilterType;
typename OtsuThresholdImageFilterType::Pointer otsuFilter=OtsuThresholdImageFilterType::New();
otsuFilter->SetInput(working_input);
otsuFilter->SetNumberOfHistogramBins(GetNumberOfHistogramBins());
otsuFilter->SetInsideValue(this->GetForegroundValue());
otsuFilter->SetOutsideValue(this->GetBackgroundValue());
otsuFilter->Update();
- working_image = otsuFilter->GetOutput();
+ working_mask = otsuFilter->GetOutput();
// Set output
- StopCurrentStep<InternalImageType>(working_image);
+ StopCurrentStep<MaskImageType>(working_mask);
+ PrintMemory(GetVerboseMemoryFlag(), "After Otsufilter");
//--------------------------------------------------------------------
//--------------------------------------------------------------------
StartNewStep("Select labels");
// Keep right labels
- working_image = LabelizeAndSelectLabels<InternalImageType>
- (working_image,
+ working_mask = LabelizeAndSelectLabels<MaskImageType>
+ (working_mask,
GetBackgroundValue(),
GetForegroundValue(),
false,
GetLabelizeParameters2());
// Set output
- StopCurrentStep<InternalImageType>(working_image);
+ StopCurrentStep<MaskImageType>(working_mask);
+ PrintMemory(GetVerboseMemoryFlag(), "After LabelizeAndSelectLabels");
//--------------------------------------------------------------------
//--------------------------------------------------------------------
if (m_Seeds.size() != 0) { // if ==0 ->no trachea found
StartNewStep("Remove the trachea");
// Set the trachea
- working_image = SetBackground<InternalImageType, InternalImageType>
- (working_image, trachea_tmp, 1, -1);
+ working_mask = SetBackground<MaskImageType, MaskImageType>
+ (working_mask, trachea, 1, -1, true);
+ PrintMemory(GetVerboseMemoryFlag(), "After SetBackground");
- // Dilate the trachea
- static const unsigned int Dim = InputImageType::ImageDimension;
+ // Dilate the trachea
+ static const unsigned int Dim = ImageType::ImageDimension;
typedef itk::BinaryBallStructuringElement<InternalPixelType, Dim> KernelType;
KernelType structuringElement;
structuringElement.SetRadius(GetRadiusForTrachea());
structuringElement.CreateStructuringElement();
- typedef clitk::ConditionalBinaryDilateImageFilter<InternalImageType, InternalImageType, KernelType> ConditionalBinaryDilateImageFilterType;
+ typedef clitk::ConditionalBinaryDilateImageFilter<MaskImageType, MaskImageType, KernelType> ConditionalBinaryDilateImageFilterType;
typename ConditionalBinaryDilateImageFilterType::Pointer dilateFilter = ConditionalBinaryDilateImageFilterType::New();
dilateFilter->SetBoundaryToForeground(false);
dilateFilter->SetKernel(structuringElement);
dilateFilter->SetBackgroundValue (1);
dilateFilter->SetForegroundValue (-1);
- dilateFilter->SetInput (working_image);
+ dilateFilter->SetInput (working_mask);
dilateFilter->Update();
- working_image = dilateFilter->GetOutput();
+ working_mask = dilateFilter->GetOutput();
+ PrintMemory(GetVerboseMemoryFlag(), "After dilate");
// Set trachea with dilatation
- trachea_tmp = SetBackground<InternalImageType, InternalImageType>
- (trachea_tmp, working_image, -1, this->GetForegroundValue());
+ trachea = SetBackground<MaskImageType, MaskImageType>
+ (trachea, working_mask, -1, this->GetForegroundValue(), true);
// Remove the trachea
- working_image = SetBackground<InternalImageType, InternalImageType>
- (working_image, working_image, -1, this->GetBackgroundValue());
+ working_mask = SetBackground<MaskImageType, MaskImageType>
+ (working_mask, working_mask, -1, this->GetBackgroundValue(), true);
// Label
- working_image = LabelizeAndSelectLabels<InternalImageType>
- (working_image,
+ working_mask = LabelizeAndSelectLabels<MaskImageType>
+ (working_mask,
GetBackgroundValue(),
GetForegroundValue(),
false,
GetLabelizeParameters3());
// Set output
- StopCurrentStep<InternalImageType>(working_image);
+ StopCurrentStep<MaskImageType>(working_mask);
}
-
//--------------------------------------------------------------------
//--------------------------------------------------------------------
- typedef clitk::AutoCropFilter<InternalImageType> CropFilterType;
- typename CropFilterType::Pointer cropFilter = CropFilterType::New();
+ PrintMemory(GetVerboseMemoryFlag(), "before autocropfilter");
if (m_Seeds.size() != 0) { // if ==0 ->no trachea found
- StartNewStep("Croping trachea");
- cropFilter->SetInput(trachea_tmp);
- cropFilter->Update(); // Needed
- typedef itk::CastImageFilter<InternalImageType, MaskImageType> CastImageFilterType;
- typename CastImageFilterType::Pointer caster= CastImageFilterType::New();
- caster->SetInput(cropFilter->GetOutput());
- caster->Update();
- trachea = caster->GetOutput();
+ if (GetAutoCrop())
+ trachea = clitk::AutoCrop<MaskImageType>(trachea, GetBackgroundValue());
+ else
+ {
+ // Remove Padding region
+ typedef itk::CropImageFilter<MaskImageType, MaskImageType> CropFilterType;
+ typename CropFilterType::Pointer cropFilter = CropFilterType::New();
+ cropFilter->SetInput(trachea);
+ cropFilter->SetLowerBoundaryCropSize(bounds);
+ cropFilter->SetUpperBoundaryCropSize(bounds);
+ cropFilter->Update();
+ trachea = cropFilter->GetOutput();
+ }
StopCurrentStep<MaskImageType>(trachea);
+ PrintMemory(GetVerboseMemoryFlag(), "after delete trachea");
}
+ PrintMemory(GetVerboseMemoryFlag(), "after delete trachea");
//--------------------------------------------------------------------
//--------------------------------------------------------------------
- StartNewStep("Croping lung");
- typename CropFilterType::Pointer cropFilter2 = CropFilterType::New(); // Needed to reset pipeline
- cropFilter2->SetInput(working_image);
- cropFilter2->Update();
- working_image = cropFilter2->GetOutput();
- StopCurrentStep<InternalImageType>(working_image);
+ StartNewStep("Cropping lung");
+ PrintMemory(GetVerboseMemoryFlag(), "Before Autocropfilter");
+ if (GetAutoCrop())
+ working_mask = clitk::AutoCrop<MaskImageType>(working_mask, GetBackgroundValue());
+ else
+ {
+ // Remove Padding region
+ typedef itk::CropImageFilter<MaskImageType, MaskImageType> CropFilterType;
+ typename CropFilterType::Pointer cropFilter = CropFilterType::New();
+ cropFilter->SetInput(working_mask);
+ cropFilter->SetLowerBoundaryCropSize(bounds);
+ cropFilter->SetUpperBoundaryCropSize(bounds);
+ cropFilter->Update();
+ working_mask = cropFilter->GetOutput();
+ }
+ StopCurrentStep<MaskImageType>(working_mask);
//--------------------------------------------------------------------
//--------------------------------------------------------------------
- StartNewStep("Separate Left/Right lungs");
- // Initial label
- working_image = Labelize<InternalImageType>(working_image,
- GetBackgroundValue(),
- false,
- GetMinimalComponentSize());
-
- // Count the labels
- typedef itk::StatisticsImageFilter<InternalImageType> StatisticsImageFilterType;
- typename StatisticsImageFilterType::Pointer statisticsImageFilter=StatisticsImageFilterType::New();
- statisticsImageFilter->SetInput(working_image);
- statisticsImageFilter->Update();
- unsigned int initialNumberOfLabels = statisticsImageFilter->GetMaximum();
- working_image = statisticsImageFilter->GetOutput();
-
- // Decompose the first label
- static const unsigned int Dim = InputImageType::ImageDimension;
- if (initialNumberOfLabels<2) {
- // Structuring element radius
- typename InputImageType::SizeType radius;
- for (unsigned int i=0;i<Dim;i++) radius[i]=1;
- typedef clitk::DecomposeAndReconstructImageFilter<InternalImageType,InternalImageType> DecomposeAndReconstructFilterType;
- typename DecomposeAndReconstructFilterType::Pointer decomposeAndReconstructFilter=DecomposeAndReconstructFilterType::New();
- decomposeAndReconstructFilter->SetInput(working_image);
- decomposeAndReconstructFilter->SetVerbose(false);
- decomposeAndReconstructFilter->SetRadius(radius);
- decomposeAndReconstructFilter->SetMaximumNumberOfLabels(2);
- decomposeAndReconstructFilter->SetMinimumObjectSize(this->GetMinimalComponentSize());
- decomposeAndReconstructFilter->SetMinimumNumberOfIterations(1);
- decomposeAndReconstructFilter->SetBackgroundValue(this->GetBackgroundValue());
- decomposeAndReconstructFilter->SetForegroundValue(this->GetForegroundValue());
- decomposeAndReconstructFilter->SetFullyConnected(true);
- decomposeAndReconstructFilter->SetNumberOfNewLabels(1);
- decomposeAndReconstructFilter->Update();
- working_image = decomposeAndReconstructFilter->GetOutput();
+ // Final OpenClose
+ if (GetOpenCloseFlag()) {
+ StartNewStep("Open/Close");
+ PrintMemory(GetVerboseMemoryFlag(), "Before OpenClose");
+
+ // Structuring element
+ typedef itk::BinaryBallStructuringElement<InternalPixelType, ImageDimension> KernelType;
+ KernelType structuringElement;
+ structuringElement.SetRadius(GetOpenCloseRadius());
+ structuringElement.CreateStructuringElement();
+
+ // Open
+ typedef itk::BinaryMorphologicalOpeningImageFilter<MaskImageType, InternalImageType, KernelType> OpenFilterType;
+ typename OpenFilterType::Pointer openFilter = OpenFilterType::New();
+ openFilter->SetInput(working_mask);
+ openFilter->SetBackgroundValue(GetBackgroundValue());
+ openFilter->SetForegroundValue(GetForegroundValue());
+ openFilter->SetKernel(structuringElement);
+
+ // Close
+ typedef itk::BinaryMorphologicalClosingImageFilter<MaskImageType, MaskImageType, KernelType> CloseFilterType;
+ typename CloseFilterType::Pointer closeFilter = CloseFilterType::New();
+ closeFilter->SetInput(openFilter->GetOutput());
+ closeFilter->SetSafeBorder(true);
+ closeFilter->SetForegroundValue(GetForegroundValue());
+ closeFilter->SetKernel(structuringElement);
+ closeFilter->Update();
+ working_mask = closeFilter->GetOutput();
+ }
+
+ //--------------------------------------------------------------------
+ //--------------------------------------------------------------------
+ // Fill Lungs
+ if (GetFillHolesFlag()) {
+ StartNewStep("Fill Holes");
+ PrintMemory(GetVerboseMemoryFlag(), "Before Fill Holes");
+ typedef clitk::FillMaskFilter<MaskImageType> FillMaskFilterType;
+ typename FillMaskFilterType::Pointer fillMaskFilter = FillMaskFilterType::New();
+ fillMaskFilter->SetInput(working_mask);
+ fillMaskFilter->AddDirection(2);
+ //fillMaskFilter->AddDirection(1);
+ fillMaskFilter->Update();
+ working_mask = fillMaskFilter->GetOutput();
+ StopCurrentStep<MaskImageType>(working_mask);
}
- // Retain labels (lungs)
- typedef itk::ThresholdImageFilter<InternalImageType> ThresholdImageFilterType;
+ if (GetSeparateLungsFlag()) {
+ //--------------------------------------------------------------------
+ //--------------------------------------------------------------------
+ StartNewStep("Separate Left/Right lungs");
+ PrintMemory(GetVerboseMemoryFlag(), "Before Separate");
+ // Initial label
+ working_mask = Labelize<MaskImageType>(working_mask,
+ GetBackgroundValue(),
+ false,
+ GetMinimalComponentSize());
+
+ PrintMemory(GetVerboseMemoryFlag(), "After Labelize");
+
+ // Count the labels
+ typedef itk::StatisticsImageFilter<MaskImageType> StatisticsImageFilterType;
+ typename StatisticsImageFilterType::Pointer statisticsImageFilter=StatisticsImageFilterType::New();
+ statisticsImageFilter->SetInput(working_mask);
+ statisticsImageFilter->Update();
+ unsigned int initialNumberOfLabels = statisticsImageFilter->GetMaximum();
+ working_mask = statisticsImageFilter->GetOutput();
+ PrintMemory(GetVerboseMemoryFlag(), "After count label");
+
+ // If already 2 labels, but a too big differences, remove the
+ // smalest one (sometimes appends with the stomach
+ if (initialNumberOfLabels >1) {
+ if (GetRemoveSmallLabelBeforeSeparationFlag()) {
+ DD(GetRemoveSmallLabelBeforeSeparationFlag());
+ typedef itk::RelabelComponentImageFilter<MaskImageType, MaskImageType> RelabelFilterType;
+ typename RelabelFilterType::Pointer relabelFilter = RelabelFilterType::New();
+ relabelFilter->SetInput(working_mask);
+ relabelFilter->SetMinimumObjectSize(10);
+ relabelFilter->Update();
+ const std::vector<float> & a = relabelFilter->GetSizeOfObjectsInPhysicalUnits();
+ std::vector<MaskImagePixelType> remove_label;
+ for(unsigned int i=1; i<a.size(); i++) {
+ if (a[i] < 0.5*a[0]) { // more than 0.5 difference
+ remove_label.push_back(i+1); // label zero is BG
+ }
+ }
+ working_mask =
+ clitk::RemoveLabels<MaskImageType>(working_mask, GetBackgroundValue(), remove_label);
+ statisticsImageFilter->SetInput(working_mask);
+ statisticsImageFilter->Update();
+ initialNumberOfLabels = statisticsImageFilter->GetMaximum();
+ }
+ }
+
+ // Decompose the first label
+ if (initialNumberOfLabels<2) {
+ // Structuring element radius
+ typename ImageType::SizeType radius;
+ for (unsigned int i=0;i<Dim;i++) radius[i]=1;
+ typedef clitk::DecomposeAndReconstructImageFilter<MaskImageType,MaskImageType> DecomposeAndReconstructFilterType;
+ typename DecomposeAndReconstructFilterType::Pointer decomposeAndReconstructFilter=DecomposeAndReconstructFilterType::New();
+ decomposeAndReconstructFilter->SetInput(working_mask);
+ decomposeAndReconstructFilter->SetVerbose(false);
+ decomposeAndReconstructFilter->SetRadius(radius);
+ decomposeAndReconstructFilter->SetMaximumNumberOfLabels(2);
+ decomposeAndReconstructFilter->SetMinimumObjectSize(this->GetMinimalComponentSize());
+ decomposeAndReconstructFilter->SetMinimumNumberOfIterations(1);
+ decomposeAndReconstructFilter->SetBackgroundValue(this->GetBackgroundValue());
+ decomposeAndReconstructFilter->SetForegroundValue(this->GetForegroundValue());
+ decomposeAndReconstructFilter->SetFullyConnected(true);
+ decomposeAndReconstructFilter->SetNumberOfNewLabels(1);
+ decomposeAndReconstructFilter->Update();
+ working_mask = decomposeAndReconstructFilter->GetOutput();
+ }
+ PrintMemory(GetVerboseMemoryFlag(), "After decomposeAndReconstructFilter");
+ }
+
+ // Retain labels ('1' is largset lung, so right. '2' is left)
+ typedef itk::ThresholdImageFilter<MaskImageType> ThresholdImageFilterType;
typename ThresholdImageFilterType::Pointer thresholdFilter = ThresholdImageFilterType::New();
- thresholdFilter->SetInput(working_image);
+ thresholdFilter->SetInput(working_mask);
thresholdFilter->ThresholdAbove(2);
thresholdFilter->SetOutsideValue(this->GetBackgroundValue());
thresholdFilter->Update();
- working_image = thresholdFilter->GetOutput();
- StopCurrentStep<InternalImageType> (working_image);
+ working_mask = thresholdFilter->GetOutput();
+ StopCurrentStep<MaskImageType> (working_mask);
+ PrintMemory(GetVerboseMemoryFlag(), "After Thresholdfilter");
+
+ // Update output info
+ // output = working_mask;
+ //this->GetOutput(0)->SetRegions(output->GetLargestPossibleRegion());
+
+ // this->GetOutput(0)->SetRegions(working_mask->GetLargestPossibleRegion());
+
}
//--------------------------------------------------------------------
//--------------------------------------------------------------------
-template <class TInputImageType, class TMaskImageType>
+template <class TImageType>
void
-clitk::ExtractLungFilter<TInputImageType, TMaskImageType>::
-GenerateData() {
- // Final Cast
- typedef itk::CastImageFilter<InternalImageType, MaskImageType> CastImageFilterType;
- typename CastImageFilterType::Pointer caster= CastImageFilterType::New();
- caster->SetInput(working_image);
- caster->Update();
- // Set output
- //this->SetNthOutput(0, caster->GetOutput()); // -> no because redo filter otherwise
- this->GraftOutput(caster->GetOutput());
- return;
+clitk::ExtractLungFilter<TImageType>::
+GenerateInputRequestedRegion() {
+ // DD("GenerateInputRequestedRegion (nothing?)");
+}
+//--------------------------------------------------------------------
+
+
+//--------------------------------------------------------------------
+template <class ImageType>
+void
+clitk::ExtractLungFilter<ImageType>::
+GenerateData()
+{
+ // Set the output
+ // this->GraftOutput(output); // not SetNthOutput
+ this->GraftOutput(working_mask); // not SetNthOutput
+ // Store image filenames into AFDB
+ GetAFDB()->SetImageFilename("Lungs", this->GetOutputLungFilename());
+ GetAFDB()->SetImageFilename("Trachea", this->GetOutputTracheaFilename());
+ WriteAFDB();
+}
+//--------------------------------------------------------------------
+
+
+//--------------------------------------------------------------------
+template <class ImageType>
+bool
+clitk::ExtractLungFilter<ImageType>::
+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 (GetVerboseStepFlag()) {
+ 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;
+ }
+ else {
+ // DD(m_Seeds[0]);
+ // DD(m_Seeds.size());
+ }
+ }
+ }
+ return (m_Seeds.size() != 0);
}
//--------------------------------------------------------------------
+
+bool is_orientation_superior(itk::SpatialOrientation::ValidCoordinateOrientationFlags orientation)
+{
+ itk::SpatialOrientation::CoordinateTerms sup = itk::SpatialOrientation::ITK_COORDINATE_Superior;
+ bool primary = (orientation & 0x0000ff) == sup;
+ bool secondary = ((orientation & 0x00ff00) >> 8) == sup;
+ bool tertiary = ((orientation & 0xff0000) >> 16) == sup;
+ return primary || secondary || tertiary;
+}
+
+//--------------------------------------------------------------------
+template <class ImageType>
+bool
+clitk::ExtractLungFilter<ImageType>::
+SearchForTracheaSeed2(int numberOfSlices)
+{
+ if (m_Seeds.size() == 0) { // try to find seed (if not zero, it is given by user)
+ if (GetVerboseRegionGrowingFlag())
+ std::cout << "SearchForTracheaSeed2(" << numberOfSlices << ", " << GetMaxElongation() << ")" << std::endl;
+
+ typedef unsigned char MaskPixelType;
+ typedef itk::Image<MaskPixelType, ImageType::ImageDimension> MaskImageType;
+ typedef itk::Image<typename MaskImageType::PixelType, 2> MaskImageType2D;
+ typedef itk::BinaryThresholdImageFilter<ImageType, MaskImageType> ThresholdFilterType;
+ typedef itk::BinaryBallStructuringElement<MaskPixelType, MaskImageType::ImageDimension> KernelType;
+ typedef itk::BinaryMorphologicalClosingImageFilter<MaskImageType, MaskImageType, KernelType> ClosingFilterType;
+ typedef itk::BinaryMorphologicalOpeningImageFilter<MaskImageType, MaskImageType, KernelType> OpeningFilterType;
+ typedef itk::ExtractImageFilter<MaskImageType, MaskImageType2D> SlicerFilterType;
+ typedef itk::ConnectedComponentImageFilter<MaskImageType2D, MaskImageType2D> LabelFilterType;
+ typedef itk::ShapeLabelObject<MaskPixelType, MaskImageType2D::ImageDimension> ShapeLabelType;
+ typedef itk::LabelMap<ShapeLabelType> LabelImageType;
+ typedef itk::LabelImageToShapeLabelMapFilter<MaskImageType2D, LabelImageType> ImageToLabelMapFilterType;
+ typedef itk::LabelMapToLabelImageFilter<LabelImageType, MaskImageType2D> LabelMapToImageFilterType;
+ typedef itk::ImageFileWriter<MaskImageType2D> FileWriterType;
+
+ // threshold to isolate airawys and lungs
+ typename ThresholdFilterType::Pointer threshold = ThresholdFilterType::New();
+ threshold->SetLowerThreshold(-2000);
+ threshold->SetUpperThreshold(GetSeedPreProcessingThreshold());
+ threshold->SetInput(working_input);
+ threshold->Update();
+
+ KernelType kernel_closing, kernel_opening;
+
+ // remove small noise
+ typename OpeningFilterType::Pointer opening = OpeningFilterType::New();
+ kernel_opening.SetRadius(1);
+ opening->SetKernel(kernel_opening);
+ opening->SetInput(threshold->GetOutput());
+ opening->Update();
+
+ typename SlicerFilterType::Pointer slicer = SlicerFilterType::New();
+#if ITK_VERSION_MAJOR >= 4
+ slicer->SetDirectionCollapseToIdentity();
+#endif
+ slicer->SetInput(opening->GetOutput());
+
+ // label result
+ typename LabelFilterType::Pointer label_filter = LabelFilterType::New();
+ label_filter->SetInput(slicer->GetOutput());
+
+ // extract shape information from labels
+ typename ImageToLabelMapFilterType::Pointer label_to_map_filter = ImageToLabelMapFilterType::New();
+ label_to_map_filter->SetInput(label_filter->GetOutput());
+
+ typename LabelMapToImageFilterType::Pointer map_to_label_filter = LabelMapToImageFilterType::New();
+ typename FileWriterType::Pointer writer = FileWriterType::New();
+
+ typename ImageType::IndexType index;
+ typename ImageType::RegionType region = working_input->GetLargestPossibleRegion();
+ typename ImageType::SizeType size = region.GetSize();
+ typename ImageType::SpacingType spacing = working_input->GetSpacing();
+ typename ImageType::PointType origin = working_input->GetOrigin();
+
+ int nslices = min(numberOfSlices, size[2]);
+ int start = 0, increment = 1;
+ itk::SpatialOrientationAdapter orientation;
+ typename ImageType::DirectionType dir = working_input->GetDirection();
+ if (!is_orientation_superior(orientation.FromDirectionCosines(dir))) {
+ start = size[2]-1;
+ increment = -1;
+ }
+
+ typename MaskImageType::PointType image_centre;
+ image_centre[0] = size[0]/2;
+ image_centre[1] = size[1]/2;
+ image_centre[2] = 0;
+
+ typedef InternalIndexType SeedType;
+ SeedType trachea_centre, shape_centre, max_e_centre, prev_e_centre;
+ typedef std::list<SeedType> PointListType;
+ typedef std::list<PointListType> SequenceListType;
+ PointListType* current_sequence = NULL;
+ SequenceListType sequence_list;
+
+ prev_e_centre.Fill(0);
+ std::ostringstream file_name;
+ index[0] = index[1] = 0;
+ size[0] = size[1] = 512;
+ size[2] = 0;
+ while (nslices--) {
+ index[2] = start;
+ start += increment;
+
+ region.SetIndex(index);
+ region.SetSize(size);
+ slicer->SetExtractionRegion(region);
+ slicer->Update();
+ label_filter->SetInput(slicer->GetOutput());
+ label_filter->Update();
+
+ label_to_map_filter->SetInput(label_filter->GetOutput());
+ label_to_map_filter->Update();
+ typename LabelImageType::Pointer label_map = label_to_map_filter->GetOutput();
+
+ if (GetWriteStepFlag()) {
+ map_to_label_filter->SetInput(label_map);
+ writer->SetInput(map_to_label_filter->GetOutput());
+ file_name.str("");
+ file_name << "labels_";
+ file_name.width(3);
+ file_name.fill('0');
+ file_name << index[2] << ".mhd";
+ writer->SetFileName(file_name.str().c_str());
+ writer->Update();
+ }
+
+ typename ShapeLabelType::Pointer shape, max_e_shape;
+ double max_elongation = GetMaxElongation();
+ double max_size = size[0]*size[1]/128;
+ double max_e = 0;
+ int nshapes = 0;
+ unsigned int nlables = label_map->GetNumberOfLabelObjects();
+ for (unsigned int j = 0; j < nlables; j++) {
+ shape = label_map->GetNthLabelObject(j);
+ if (shape->Size() > 150 && shape->Size() <= max_size) {
+#if ITK_VERSION_MAJOR < 4
+ double e = 1 - 1/shape->GetBinaryElongation();
+#else
+ double e = 1 - 1/shape->GetElongation();
+#endif
+ //double area = 1 - r->Area() ;
+ if (e < max_elongation) {
+ nshapes++;
+ shape_centre[0] = (shape->GetCentroid()[0] - origin[0])/spacing[0];
+ shape_centre[1] = (shape->GetCentroid()[1] - origin[1])/spacing[1];
+ shape_centre[2] = index[2];
+ //double d = 1 - (shape_centre - image_centre).Magnitude()/max_dist;
+ double dx = shape_centre[0] - image_centre[0];
+ double d = 1 - dx*2/size[0];
+ e = e + d;
+ if (e > max_e)
+ {
+ max_e = e;
+ max_e_shape = shape;
+ max_e_centre = shape_centre;
+ }
+ }
+ }
+ }
+
+ if (nshapes > 0)
+ {
+ itk::Point<typename SeedType::IndexValueType, ImageType::ImageDimension> p1, p2;
+ p1[0] = max_e_centre[0];
+ p1[1] = max_e_centre[1];
+ p1[2] = max_e_centre[2];
+
+ p2[0] = prev_e_centre[0];
+ p2[1] = prev_e_centre[1];
+ p2[2] = prev_e_centre[2];
+
+ double mag = (p2 - p1).GetNorm();
+ if (GetVerboseRegionGrowingFlag()) {
+ cout.precision(3);
+ cout << index[2] << ": ";
+ cout << "region(" << max_e_centre[0] << ", " << max_e_centre[1] << ", " << max_e_centre[2] << "); ";
+ cout << "prev_region(" << prev_e_centre[0] << ", " << prev_e_centre[1] << ", " << prev_e_centre[2] << "); ";
+ cout << "mag(" << mag << "); " << endl;
+ }
+
+ if (mag > 5)
+ {
+ PointListType point_list;
+ point_list.push_back(max_e_centre);
+ sequence_list.push_back(point_list);
+ current_sequence = &sequence_list.back();
+ }
+ else if (current_sequence)
+ current_sequence->push_back(max_e_centre);
+
+ prev_e_centre= max_e_centre;
+ }
+ else {
+ if (GetVerboseRegionGrowingFlag()) {
+ cout << "No shapes found at slice " << index[2] << std::endl;
+ }
+ }
+ }
+
+ size_t longest = 0;
+ for (typename SequenceListType::iterator s = sequence_list.begin(); s != sequence_list.end(); s++)
+ {
+ if (s->size() > longest)
+ {
+ longest = s->size();
+ trachea_centre = s->front();
+ }
+ }
+
+ if (longest > 0) {
+ if (GetVerboseRegionGrowingFlag())
+ std::cout << "seed at: " << trachea_centre << std::endl;
+ m_Seeds.push_back(trachea_centre);
+ }
+ }
+ return (m_Seeds.size() != 0);
+}
+//--------------------------------------------------------------------
+
+//--------------------------------------------------------------------
+template <class ImageType>
+void
+clitk::ExtractLungFilter<ImageType>::
+TracheaRegionGrowing()
+{
+ // Explosion controlled region growing
+ PrintMemory(GetVerboseMemoryFlag(), "Before ExplosionControlledThresholdConnectedImageFilter");
+ typedef clitk::ExplosionControlledThresholdConnectedImageFilter<ImageType, MaskImageType> ImageFilterType;
+ typename ImageFilterType::Pointer f= ImageFilterType::New();
+ f->SetInput(working_input);
+ f->SetLower(-2000);
+ f->SetUpper(GetUpperThresholdForTrachea());
+ f->SetMinimumLowerThreshold(-2000);
+ // f->SetMaximumUpperThreshold(0); // MAYBE TO CHANGE ???
+ f->SetMaximumUpperThreshold(-300); // MAYBE TO CHANGE ???
+ f->SetAdaptLowerBorder(false);
+ f->SetAdaptUpperBorder(true);
+ f->SetMinimumSize(5000);
+ f->SetReplaceValue(1);
+ f->SetMultiplier(GetMultiplierForTrachea());
+ f->SetThresholdStepSize(GetThresholdStepSizeForTrachea());
+ f->SetMinimumThresholdStepSize(1);
+ f->SetVerbose(GetVerboseRegionGrowingFlag());
+ for(unsigned int i=0; i<m_Seeds.size();i++) {
+ f->AddSeed(m_Seeds[i]);
+ // DD(m_Seeds[i]);
+ }
+ f->Update();
+ PrintMemory(GetVerboseMemoryFlag(), "After RG update");
+
+ // take first (main) connected component
+ trachea = Labelize<MaskImageType>(f->GetOutput(),
+ GetBackgroundValue(),
+ true,
+ 1000);//GetMinimalComponentSize());
+ PrintMemory(GetVerboseMemoryFlag(), "After Labelize");
+ trachea = KeepLabels<MaskImageType>(trachea,
+ GetBackgroundValue(),
+ GetForegroundValue(),
+ 1, 1, false);
+ PrintMemory(GetVerboseMemoryFlag(), "After KeepLabels");
+}
+//--------------------------------------------------------------------
+
+
+//--------------------------------------------------------------------
+template <class ImageType>
+double
+clitk::ExtractLungFilter<ImageType>::
+ComputeTracheaVolume()
+{
+ typedef itk::ImageRegionConstIterator<InternalImageType> IteratorType;
+ IteratorType iter(trachea, trachea->GetLargestPossibleRegion());
+ iter.GoToBegin();
+ double volume = 0.0;
+ while (!iter.IsAtEnd()) {
+ if (iter.Get() == this->GetForegroundValue()) volume++;
+ ++iter;
+ }
+
+ double voxelsize = trachea->GetSpacing()[0]*trachea->GetSpacing()[1]*trachea->GetSpacing()[2];
+ return volume*voxelsize;
+}
+//--------------------------------------------------------------------
+
+
+//--------------------------------------------------------------------
+template <class ImageType>
+void
+clitk::ExtractLungFilter<ImageType>::
+SearchForTrachea()
+{
+ // Search for seed among n slices, skip some slices before starting
+ // if not found -> skip more and restart
+
+ // when seed found : perform region growing
+ // compute trachea volume
+ // if volume not plausible -> skip more slices and restart
+
+ bool has_seed;
+ bool stop = false;
+ double volume = 0.0;
+ int skip = GetNumberOfSlicesToSkipBeforeSearchingSeed();
+ while (!stop) {
+ stop = true;
+ if (GetTracheaSeedAlgorithm() == 0)
+ has_seed = SearchForTracheaSeed(skip);
+ else
+ has_seed = SearchForTracheaSeed2(GetNumSlices());
+
+ if (has_seed) {
+ TracheaRegionGrowing();
+ volume = ComputeTracheaVolume()/1000; // assume mm3, so divide by 1000 to get cc
+ if (GetWriteStepFlag()) {
+ writeImage<MaskImageType>(trachea, "step-trachea-"+toString(skip)+".mhd");
+ }
+ if (GetTracheaVolumeMustBeCheckedFlag()) {
+ if ((volume > 10) && (volume < 65 )) { // depend on image size ...
+ // Typical volume 22.59 cm 3 (± 7.69 cm 3 ) [ Leader 2004 ]
+ if (GetVerboseStepFlag())
+ {
+ std::cout << "\t Found trachea with volume " << volume << " cc." << std::endl;
+ }
+ }
+ else
+ if (GetTracheaSeedAlgorithm() == 0) {
+ if (GetVerboseStepFlag()) {
+ std::cout << "\t The volume of the trachea (" << volume
+ << " cc) seems not correct. I skip some slices (" << skip << ") and restart to find seeds."
+ << std::endl;
+ }
+ skip += 5;
+ stop = false;
+ // empty the list of seed
+ m_Seeds.clear();
+ }
+ 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 << "2 : Number of slices to skip to find trachea too high = " << skip << std::endl;
+ stop = true;
+ }
+ }
+ else {
+ stop = true;
+ }
+ }
+ }
+
+ if (volume != 0.0) {
+ // Set output
+ StopCurrentStep<MaskImageType>(trachea);
+ }
+ else { // Trachea not found
+ this->SetWarning("* WARNING * No seed found for trachea.");
+ StopCurrentStep();
+ }
+}
+//--------------------------------------------------------------------
+
#endif //#define CLITKBOOLEANOPERATORLABELIMAGEFILTER_TXX
git://git.creatis.insa-lyon.fr / clitk.git / blobdiff