Qt VTK显示单张DICOM图像并调节窗宽窗位

落日映苍穹つ 2023-07-18 03:20 21阅读 0赞

开发环境:

*  Qt 5.12.7( & Visual Studio 2017)
 *  VTK 8.2.0

源代码：

#include <QtWidgets/QApplication>
    
    #include <vtkAutoInit.h>
    VTK_MODULE_INIT(vtkRenderingOpenGL2)
    VTK_MODULE_INIT(vtkInteractionStyle)
    VTK_MODULE_INIT(vtkRenderingFreeType)
    VTK_MODULE_INIT(vtkRenderingVolumeOpenGL2)
    
    #include <QVTKOpenGLNativeWidget.h>
    #include <vtkDICOMImageReader.h>
    #include <vtkGenericOpenGLRenderWindow.h>
    #include <vtkRenderer.h>
    #include <vtkImageSlice.h>
    #include <vtkImageResliceMapper.h>
    #include <vtkRenderWindowInteractor.h>
    #include <vtkInteractorStyleImage.h>
    #include <vtkNew.h>
    
    const char* dcmFileName = "G:/DICOM/DCM/009/I1270.dcm";
    
    int main(int argc, char *argv[])
    {
        QApplication a(argc, argv);
    
        QVTKOpenGLNativeWidget w;
    
        vtkNew<vtkDICOMImageReader> reader;
        vtkNew<vtkGenericOpenGLRenderWindow> renderWindow;
        vtkNew<vtkRenderer> renderer;
        vtkNew<vtkImageSlice> imageSlice;
        vtkNew<vtkImageResliceMapper> mapper;
        vtkNew<vtkInteractorStyleImage> interactorStyle;    // 用于响应鼠标事件以调节窗宽窗位
    
        reader->SetFileName(dcmFileName);
        reader->Update();
        vtkImageData* imageData = reader->GetOutput();
    
        mapper->SetInputData(imageData);
        imageSlice->SetMapper(mapper);
        renderer->AddViewProp(imageSlice);
        renderWindow->AddRenderer(renderer);
        w.SetRenderWindow(renderWindow);
        w.GetInteractor()->SetInteractorStyle(interactorStyle);
    
        renderer->ResetCamera();
        w.show();
    
        return a.exec();
    }

运行效果：

鼠标左键按住不放，上下移动调整窗位，左右移动调整窗宽

鼠标右键按住不放，上下移动放大缩小，或者使用鼠标滚轮

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1dVOTc5Nw_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1dVOTc5Nw_size_16_color_FFFFFF_t_70 1][]

扩展：如果不想使用上述VTK默认方式调节调节窗位，同时也不想让图像显示成三维模式（可以旋转），那么需要继承vtkInteractorStyleImage类，将虚函数virtual void WindowLevel()重写，如下代码所示：

//
    // QVtkInteractorStyleImage.h
    //
    #pragma once
    
    #include <vtkInteractorStyleImage.h>
    
    class QVtkInteractorStyleImage : public vtkInteractorStyleImage
    {
    public:
        static QVtkInteractorStyleImage *New();
        vtkTypeMacro(QVtkInteractorStyleImage, QVtkInteractorStyleImage);
    
        virtual void WindowLevel() override;
    
    protected:
        QVtkInteractorStyleImage() = default;
        ~QVtkInteractorStyleImage() = default;
    
    };

//
    // QVtkInteractorStyleImage.cpp
    //
    #include "QVtkInteractorStyleImage.h"
    #include <vtkObjectFactory.h>
    
    vtkStandardNewMacro(QVtkInteractorStyleImage);
    
    void QVtkInteractorStyleImage::WindowLevel()
    {
    
    }

设置窗宽窗位接口：

imageSlice->GetProperty()->SetColorLevel(/*double*/val);   // 窗位
    imageSlice->GetProperty()->SetColorWindow(/*double*/val);  // 窗宽

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1dVOTc5Nw_size_16_color_FFFFFF_t_70]: /images/20230528/214f4e5cdf51450c823fe53044172ac3.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1dVOTc5Nw_size_16_color_FFFFFF_t_70 1]: /images/20230528/b05208c84ea5482cacd467990cff4e05.png