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MPR多平面重建一：初步实现

ai 2025/8/21 8:52:09

MPR多平面重建的初步实现

一、功能概述

用三个窗口分别显示冠状位、矢状位、横断位的切面图像;
左键按住调节窗宽；
右键按住缩放；
中键按住平移；
滚轮滚动时翻页；

二、代码实现

class mprVtkInteractorStyleImage : public vtkInteractorStyleImage
{
public:static mprVtkInteractorStyleImage* New();vtkTypeMacro(mprVtkInteractorStyleImage, vtkInteractorStyleImage);protected:vtkImageViewer2* _imageViewer;int _slice;int _minSlice;int _maxSlice;public:void SetImageViewer(vtkImageViewer2* imageViewer){_imageViewer = imageViewer;_minSlice = imageViewer->GetSliceMin();_maxSlice = imageViewer->GetSliceMax();_slice = imageViewer->GetSlice();}void MoveSliceForward(){if(_slice < _maxSlice){_slice += 1;_imageViewer->SetSlice(_slice);_imageViewer->Render();}}void MoveSliceBackward(){if(_slice > _minSlice){_slice -= 1;_imageViewer->SetSlice(_slice);_imageViewer->Render();}}virtual void OnKeyDown() override{string key = this->GetInteractor()->GetKeySym();if(key.compare("Up") == 0){MoveSliceForward();}else if(key.compare("Down") == 0){MoveSliceBackward();}//vtkInteractorStyleImage::OnKeyDown();//删除默认父类调用}virtual void OnMouseWheelForward() override{MoveSliceForward();}virtual void OnMouseWheelBackward() override{if(_slice > _minSlice){MoveSliceBackward();}}
};vtkStandardNewMacro(mprVtkInteractorStyleImage);
//一定要是全局变量，不能是局部变量；
//局部变量在函数结束后销毁，在mprVtkInteractorStyleImage访问时会报错；
vtkSmartPointer<vtkImageViewer2> viewX;
vtkSmartPointer<vtkImageViewer2> viewY;
vtkSmartPointer<vtkImageViewer2> viewZ;
vtkSmartPointer<mprVtkInteractorStyleImage> mprInteractorStyleX;
vtkSmartPointer<mprVtkInteractorStyleImage> mprInteractorStyleY;
vtkSmartPointer<mprVtkInteractorStyleImage> mprInteractorStyleZ;
void MainWindow::on_dataLoad_pB_clicked()
{QString path = QFileDialog::getExistingDirectory(this,"请选择文件夹路径...","D:/S100/");//1、读取Dicom文件vtkSmartPointer<vtkDICOMImageReader> reader = vtkSmartPointer<vtkDICOMImageReader>::New();reader->SetDirectoryName(path.toStdString().c_str());reader->Update();vtkSmartPointer<vtkImageData> imageData = reader->GetOutput();//冠状位viewX = vtkSmartPointer<vtkImageViewer2>::New();viewX->SetInputData(imageData);viewX->SetSliceOrientation(0);//设置切面vtkSmartPointer<vtkRenderWindow> renderWindowX = this->ui->openGLWidget_MPR_X->renderWindow();viewX->SetRenderWindow(renderWindowX);viewX->SetColorLevel(25);viewX->SetColorWindow(3000);//创建交互器样式mprInteractorStyleX = vtkSmartPointer<mprVtkInteractorStyleImage>::New();//把imageView传进去mprInteractorStyleX->SetImageViewer(viewX);//创建交互器vtkSmartPointer<vtkRenderWindowInteractor> interactorX = vtkSmartPointer<vtkRenderWindowInteractor>::New();interactorX->SetRenderWindow(renderWindowX);//一定是先设置；如果后设置，会覆盖之前的设置，style就会失效viewX->SetupInteractor(interactorX);//再设置样式interactorX->SetInteractorStyle(mprInteractorStyleX);//再初始化interactorX->Initialize();viewX->Render();viewX->GetRenderer()->ResetCamera();//矢状位viewY = vtkSmartPointer<vtkImageViewer2>::New();viewY->SetInputData(imageData);viewY->SetSliceOrientation(1);//设置切面vtkSmartPointer<vtkRenderWindow> renderWindowY = this->ui->openGLWidget_MPR_Y->renderWindow();viewY->SetRenderWindow(renderWindowY);viewY->SetColorLevel(25);viewY->SetColorWindow(3000);//创建交互器样式mprInteractorStyleY = vtkSmartPointer<mprVtkInteractorStyleImage>::New();//把imageView传进去mprInteractorStyleY->SetImageViewer(viewY);//创建交互器vtkSmartPointer<vtkRenderWindowInteractor> interactorY = vtkSmartPointer<vtkRenderWindowInteractor>::New();interactorY->SetRenderWindow(renderWindowY);//一定是先设置；如果后设置，会覆盖之前的设置，style就会失效viewY->SetupInteractor(interactorY);//再设置样式interactorY->SetInteractorStyle(mprInteractorStyleY);//再初始化interactorY->Initialize();viewY->Render();viewY->GetRenderer()->ResetCamera();//横断位viewZ = vtkSmartPointer<vtkImageViewer2>::New();viewZ->SetInputData(imageData);viewZ->SetSliceOrientation(2);//设置切面vtkSmartPointer<vtkRenderWindow> renderWindowZ = this->ui->openGLWidget_MPR_Z->renderWindow();viewZ->SetRenderWindow(renderWindowZ);viewZ->SetColorLevel(25);viewZ->SetColorWindow(3000);//创建交互器样式mprInteractorStyleZ = vtkSmartPointer<mprVtkInteractorStyleImage>::New();//把imageView传进去mprInteractorStyleZ->SetImageViewer(viewZ);//创建交互器vtkSmartPointer<vtkRenderWindowInteractor> interactorZ = vtkSmartPointer<vtkRenderWindowInteractor>::New();interactorZ->SetRenderWindow(renderWindowZ);//一定是先设置；如果后设置，会覆盖之前的设置，style就会失效viewZ->SetupInteractor(interactorZ);//再设置样式interactorZ->SetInteractorStyle(mprInteractorStyleZ);//再初始化interactorZ->Initialize();viewZ->Render();viewZ->GetRenderer()->ResetCamera();
}