[Qt + VTK] Displaying Single DICOM File Using VTK Widget in Qt

To install the VTK library, you should see tutorial how to install VTK library using CMAKE.
Read this post if you want to read a series of DICOM files using sliderbar.
1. Create a new "Qt GUI Application" Project in Qt
2. Open the .pro file, add the following items in it:

LIBS += -L/usr/local/lib/vtk-5.10 #folder to your VTK library

LIBS += -lvtkCommon \

        -lvtkRendering \

        -lvtkVolumeRendering \

        -lQVTK \

        -lvtkIO \

        -lvtkFiltering \

        -lvtkgdcm

INCLUDEPATH += /usr/local/include/vtk-5.10 #folder to your VTK include files

3. Open the ui designer in Qt Creator (just double click the .ui file)

4. Add a button and a QWidget, right click on QWidget choose "promote to...".

5. A new window appears, in the "Promoted class name" text box insert "QVTKWidget" and in the Header file section, input "QVTKWidget.h" (case-sensitive). Don't mess with the picture below, in my picture the Base class name is QPushButton, but it should appears as QWidget.

6. Just add the following source code to your project:

mainwindow.cpp:

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <vtkSmartPointer.h>
#include <vtkImageViewer2.h>
#include <vtkDICOMImageReader.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <QVTKWidget.h>
#include <QFileDialog>
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::openDCMFile()
{
    QString fileNameDCM = QFileDialog::getOpenFileName(this,tr("Open File DCM"),QDir::currentPath(),tr("DCM Files (*.dcm )"));
    std::string stdstrFileNameDCM = fileNameDCM.toUtf8().constData();
    drawDICOMImg(stdstrFileNameDCM);
}

void MainWindow::drawDICOMImg(std::string fileDICOM)
{
    vtkSmartPointer<vtkDICOMImageReader> reader =
        vtkSmartPointer<vtkDICOMImageReader>::New();
      reader->SetFileName(fileDICOM.c_str());
      reader->Update();

      vtkSmartPointer<vtkImageViewer2> imageViewer =
        vtkSmartPointer<vtkImageViewer2>::New();
      imageViewer->SetInputConnection(reader->GetOutputPort());
      imageViewer->SetRenderWindow(ui->vtkRenderer->GetRenderWindow());
      imageViewer->Render();

}

void MainWindow::on_btnOpenDCM_clicked()
{
    openDCMFile();
}

mainwindow.h:
#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT
    
public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
    
private slots:
    void openDCMFile();
    void drawDICOMImg(std::string fileDICOM);
    void on_btnOpenDCM_clicked();

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H
main.cpp:
#include "mainwindow.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    
    return a.exec();
}



DOWNLOAD THE COMPLETE SOURCE CODE: QtSingleDCMDisplay.zip