ActiViz.Net实现MPR功能

Question

通过vtkResliceImageViewer事项MRP功能，得到的XY切面和YZ切面的图像都是反向的，而且XZ切面的图像还是反向加翻转的，这个问题怎么处理？

dicomImageReader = vtkDICOMImageReader.New();
            dicomImageReader.SetDirectoryName(DicPath);
            dicomImageReader.Update();

            resliceImageViewers = new vtkResliceImageViewer[SliceNum];
            for (int i = 0; i < SliceNum; i++)
            {
                resliceImageViewers[i] = vtkResliceImageViewer.New();
                resliceImageViewers[i].SetInputData(dicomImageReader.GetOutput());
                vtkResliceCursorLineRepresentation rep = vtkResliceCursorLineRepresentation.SafeDownCast(resliceImageViewers[i].GetResliceCursorWidget().GetRepresentation());
                for (int k = 0; k < 3; k++)
                {
                    rep.GetResliceCursorActor().GetCenterlineProperty(k).SetRepresentationToWireframe();
                    rep.GetResliceCursorActor().GetCenterlineProperty(k).RenderLinesAsTubesOn();
                    rep.GetResliceCursorActor().GetCenterlineProperty(k).SetLineWidth(2);
                    switch (k)
                    {
                        case 0:
                            ;
                            rep.GetResliceCursorActor().GetCenterlineProperty(k).SetColor(0, 0, 255);
                            break;
                        case 1:
                            rep.GetResliceCursorActor().GetCenterlineProperty(k).SetColor(0, 255, 0);
                            break;
                        case 2:
                            rep.GetResliceCursorActor().GetCenterlineProperty(k).SetColor(255, 0, 0);
                            break;
                    }
                }


                switch (i)
                {
                    case 0:
                        {
                            resliceImageViewers[i].SetRenderWindow(renderWindowControlAxial.RenderWindow);
                            resliceImageViewers[i].SetupInteractor(renderWindowControlAxial.RenderWindow.GetInteractor());
                            rep.GetResliceCursorActor().GetCursorAlgorithm().SetReslicePlaneNormalToZAxis();
                            resliceImageViewers[i].SetSliceOrientationToXY();
                            break;
                        }
                    case 1:
                        {
                            resliceImageViewers[i].SetRenderWindow(renderWindowControlSagittal.RenderWindow);
                            resliceImageViewers[i].SetupInteractor(renderWindowControlSagittal.RenderWindow.GetInteractor());
                            rep.GetResliceCursorActor().GetCursorAlgorithm().SetReslicePlaneNormalToXAxis();
                            resliceImageViewers[i].SetSliceOrientationToYZ();
                            break;
                        }
                    case 2:
                        {
                            resliceImageViewers[i].SetRenderWindow(renderWindowControlCoronal.RenderWindow);
                            resliceImageViewers[i].SetupInteractor(renderWindowControlCoronal.RenderWindow.GetInteractor());
                            rep.GetResliceCursorActor().GetCursorAlgorithm().SetReslicePlaneNormalToYAxis();
                            resliceImageViewers[i].SetSliceOrientationToXZ();
                            break;
                        }
                }


                resliceImageViewers[i].SetResliceModeToAxisAligned();
                resliceImageViewers[i].SetLookupTable(resliceImageViewers[0].GetLookupTable());
                resliceImageViewers[i].SetColorWindow(DefaultWindowLevel[0]);
                resliceImageViewers[i].SetColorLevel(DefaultWindowLevel[1]);
                resliceImageViewers[i].SetThickMode(0);
                resliceImageViewers[i].SetResliceMode(1);
                rep.SetManipulationMode(2);
                resliceImageViewers[i].SetResliceCursor(resliceImageViewers[0].GetResliceCursor());
                //resliceImageViewers[i].GetResliceCursorWidget().SetEnabled(1);
                resliceImageViewers[i].GetResliceCursorWidget().SetManageWindowLevel(0);
                resliceImageViewers[i].SetSlice(resliceImageViewers[i].GetSliceMax() / 2);

                resliceImageViewers[i].GetRenderer().ResetCameraScreenSpace();
                resliceImageViewers[i].Render();
                resliceImageViewers[i].Reset();

            }

Answer 1

该回答引用ChatGPT-3.5，仅供参考，不保证完全正确

要解决反向和翻转的问题，可以尝试在创建vtkResliceImageViewer对象之后添加以下代码：

resliceImageViewers[i].SetResliceAxesDirectionCosines(dicomImageReader.GetOutput().GetDirection());
resliceImageViewers[i].SetResliceAxesOrigin(dicomImageReader.GetOutput().GetOrigin());

这将使用DICOM图像的方向余弦和原点信息来设置切面的方向和位置。这样可以确保切面与图像匹配并且不会出现反向或翻转的情况。

在你的代码中，可以将上述代码添加到以下位置：

switch (i)
{
    case 0:
        {
            resliceImageViewers[i].SetRenderWindow(renderWindowControlAxial.RenderWindow);
            resliceImageViewers[i].SetupInteractor(renderWindowControlAxial.RenderWindow.GetInteractor());
            rep.GetResliceCursorActor().GetCursorAlgorithm().SetReslicePlaneNormalToZAxis();
            resliceImageViewers[i].SetSliceOrientationToXY();
            break;
        }
    case 1:
        {
            resliceImageViewers[i].SetRenderWindow(renderWindowControlSagittal.RenderWindow);
            resliceImageViewers[i].SetupInteractor(renderWindowControlSagittal.RenderWindow.GetInteractor());
            rep.GetResliceCursorActor().GetCursorAlgorithm().SetReslicePlaneNormalToXAxis();
            resliceImageViewers[i].SetSliceOrientationToYZ();
            break;
        }
    case 2:
        {
            resliceImageViewers[i].SetRenderWindow(renderWindowControlCoronal.RenderWindow);
            resliceImageViewers[i].SetupInteractor(renderWindowControlCoronal.RenderWindow.GetInteractor());
            rep.GetResliceCursorActor().GetCursorAlgorithm().SetReslicePlaneNormalToYAxis();
            resliceImageViewers[i].SetSliceOrientationToXZ();
            break;
        }
}

// 添加以下代码
resliceImageViewers[i].SetResliceAxesDirectionCosines(dicomImageReader.GetOutput().GetDirection());
resliceImageViewers[i].SetResliceAxesOrigin(dicomImageReader.GetOutput().GetOrigin());

通过这样设置切面的方向和位置，应该能够解决反向和翻转的问题。

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该回答引用NewBing，仅供参考，不保证完全正确

根据我从网络上搜索到的信息，ActiViz.Net是一个集成了VTK（可视化工具包）的.NET框架，可以用于在.NET编程语言中使用VTK的强大功能。VTK是一个用于3D图形，数据可视化，数据处理等的面向对象的软件系统。¹

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您的代码看起来是使用了vtkResliceImageViewer类来实现MPR功能，这个类可以根据不同的切面方向来显示DICOM图像。²

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我注意到您的代码中没有设置切面图像的方向属性，这可能导致图像显示不正确。您可以尝试在每个resliceImageViewer对象上调用SetResliceAxesDirectionCosines方法，传入一个包含三个方向余弦向量的数组，来指定切面图像的方向。³

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例如，如果您想让XY切面图像与DICOM图像的方向一致，您可以这样写：

resliceImageViewers[0].SetResliceAxesDirectionCosines(new double[] { 1, 0, 0, 0, 1, 0, 0, 0, 1 });

如果您想让YZ切面图像与DICOM图像的方向一致，您可以这样写：

resliceImageViewers[1].SetResliceAxesDirectionCosines(new double[] { 0, 1, 0, 0, 0, -1, -1, 0, 0 });

如果您想让XZ切面图像与DICOM图像的方向一致，您可以这样写：

resliceImageViewers[2].SetResliceAxesDirectionCosines(new double[] { 1, 0, 0, 0, 0, -1, 0, -1, 0 });

这些方向余弦向量是根据DICOM标准中定义的Image Position和Image Orientation计算得到的。³

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源: 与必应的对话， 2023/7/18
(1) ActiViz .NET User's Guide Version 9 - Kitware Europe. https://www.kitware.eu/wp-content/uploads/2021/02/ActiViz.NET_9.0_Users_Guide.pdf.
(2) GitHub - dikubb/Activiz-Demo: MPR Demo using Activiz. https://github.com/dikubb/Activiz-Demo.
(3) How can i determine the ImagePosition of the reconstructed MPR DICOM image?. https://stackoverflow.com/questions/6846761/how-can-i-determine-the-imageposition-of-the-reconstructed-mpr-dicom-image.
(4) undefined. http://www.kitware.com/.
(5) undefined. https://training.kitware.fr/browse.
(6) undefined. https://www.kitware.eu/service/support.
(7) undefined. https://www.kitware.com/what-we-offer/#books.
(8) undefined. http://www.vtk.org/.
(9) undefined. http://www.slicer.org/.
(10) undefined. http://www.paraview.org/.