基于VTK9.3.0+Visual Studio2017 c++实现DICOM影像MPR多平面重建

开源库：VTK9.3.0

开发工具：Visual Studio2017

开发语言：C++

实现过程：

void initImageActor(double* Matrix, double* center, vtkSmartPointer<vtkImageCast> pImageCast,
	vtkSmartPointer<vtkImageReslice> imageReslice, vtkSmartPointer<vtkImageActor> actor)
{
	vtkSmartPointer<vtkMatrix4x4> AxialResliceMatrix = vtkSmartPointer<vtkMatrix4x4>::New();
	AxialResliceMatrix->DeepCopy(Matrix);

	AxialResliceMatrix->SetElement(0, 3, center[0]);
	AxialResliceMatrix->SetElement(1, 3, center[1]);
	AxialResliceMatrix->SetElement(2, 3, center[2]);

	imageReslice->SetInputConnection(pImageCast->GetOutputPort());
	imageReslice->SetOutputDimensionality(2);
	imageReslice->SetResliceAxes(AxialResliceMatrix);
	imageReslice->SetInterpolationModeToLinear();
	imageReslice->Update();

	actor->GetMapper()->SetInputConnection(imageReslice->GetOutputPort());
	actor->SetPosition(0, 0, 0);
}

int main()
{
	vtkSmartPointer<vtkImageReslice> pImageResliceX = vtkSmartPointer<vtkImageReslice>::New();
	vtkSmartPointer<vtkImageReslice> pImageResliceY = vtkSmartPointer<vtkImageReslice>::New();
	vtkSmartPointer<vtkImageReslice> pImageResliceZ = vtkSmartPointer<vtkImageReslice>::New();

	vtkSmartPointer<vtkDICOMImageReader> reader = vtkSmartPointer<vtkDICOMImageReader>::New();
	reader->SetDirectoryName("D:\\image\\images\\CT\\20200115"); //dicom文件目录
	reader->Update();

	int extent[6];
	double spacing[3];
	double origin[3];

	reader->GetOutput()->GetExtent(extent);
	reader->GetOutput()->GetSpacing(spacing);
	reader->GetOutput()->GetOrigin(origin);

	double center[3];
	center[0] = origin[0] + spacing[0] * 0.5 * (extent[0] + extent[1]);
	center[1] = origin[1] + spacing[1] * 0.5 * (extent[2] + extent[3]);
	center[2] = origin[2] + spacing[2] * 0.5 * (extent[4] + extent[5]);

	double Axial[16] = {
		1, 0, 0, 0,
		0, 1, 0, 0,
		0, 0, 1, 0,
		0, 0, 0, 1 };
	double Coronal[16] = {
		1, 0, 0, 0,
		0, 0, -1, 0,
		0, 1, 0, 0,
		0, 0, 0, 1 };
	double Sagittal[16] = {
		0, 0, 1, 0,
		1, 0, 0, 0,
		0, 1, 0, 0,
		0, 0, 0, 1 };

	vtkSmartPointer<vtkImageCast> pImageCast = vtkSmartPointer<vtkImageCast>::New();
	pImageCast->SetInputConnection(reader->GetOutputPort());
	pImageCast->SetOutputScalarTypeToUnsignedChar();
	pImageCast->ClampOverflowOn();
	pImageCast->Update();

	vtkSmartPointer<vtkImageActor> pImageActorX = vtkSmartPointer<vtkImageActor>::New();
	vtkSmartPointer<vtkImageActor> pImageActorY = vtkSmartPointer<vtkImageActor>::New();
	vtkSmartPointer<vtkImageActor> pImageActorZ = vtkSmartPointer<vtkImageActor>::New();

	initImageActor(Axial, center, pImageCast, pImageResliceX, pImageActorX);
	initImageActor(Coronal, center, pImageCast, pImageResliceY, pImageActorY);
	initImageActor(Sagittal, center, pImageCast, pImageResliceZ, pImageActorZ);

	vtkSmartPointer<vtkRenderer> pRendererX = vtkSmartPointer<vtkRenderer>::New();
	vtkSmartPointer<vtkRenderer> pRendererY = vtkSmartPointer<vtkRenderer>::New();
	vtkSmartPointer<vtkRenderer> pRendererZ = vtkSmartPointer<vtkRenderer>::New();
	vtkSmartPointer<vtkRenderer> pRenderer = vtkSmartPointer<vtkRenderer>::New();
	vtkSmartPointer<vtkRenderWindow> pRenderWindow = vtkSmartPointer<vtkRenderWindow>::New();

	pRendererX->AddActor(pImageActorX);
	pRendererY->AddActor(pImageActorY);
	pRendererZ->AddActor(pImageActorZ);

	pRendererX->SetBackground(0, 0, 0);
	pRendererY->SetBackground(0, 0, 0);
	pRendererZ->SetBackground(0, 0, 0);
	pRenderer->SetBackground(0.1, 0.2, 0.4);

	double ltView[4] = { 0, 0, 0.5, 0.5 };
	double rtView[4] = { 0.5, 0, 1, 0.5 };
	double lbView[4] = { 0, 0.5, 0.5, 1 };
	double rbView[4] = { 0.5, 0.5, 1, 1 };

	pRenderer->SetViewport(rtView);
	pRendererX->SetViewport(lbView);
	pRendererY->SetViewport(rbView);
	pRendererZ->SetViewport(ltView);

	pRenderWindow->AddRenderer(pRendererX);
	pRenderWindow->AddRenderer(pRendererY);
	pRenderWindow->AddRenderer(pRendererZ);
	pRenderWindow->AddRenderer(pRenderer);

	vtkSmartPointer<vtkRenderWindowInteractor> pRenderWindowInteractor =
		vtkSmartPointer<vtkRenderWindowInteractor>::New();

	pRenderWindow->SetSize(600, 600);

	vtkSmartPointer<vtkInteractorStyleImage> imagestyle = vtkSmartPointer<vtkInteractorStyleImage>::New();

	pRenderWindowInteractor->SetInteractorStyle(imagestyle);
	pRenderWindowInteractor->SetRenderWindow(pRenderWindow);
	pRenderWindowInteractor->Initialize();

	pRenderWindow->Render();

	pRenderWindowInteractor->Initialize();
	pRenderWindowInteractor->Start();

	return 0;
}

运行结果：