C++实现itk读取dicom文件并转成vtk数据

可以使用ITK库中的`itk::ImageSeriesReader`读取DICOM文件，并使用VTK库中的`vtkImageData`转换为VTK数据。

以下是一个简单的示例代码：

#include <iostream>
#include <string>

#include "itkImage.h"
#include "itkImageSeriesReader.h"
#include "itkGDCMImageIO.h"
#include "itkGDCMSeriesFileNames.h"
#include "itkImageToVTKImageFilter.h"
#include "vtkSmartPointer.h"
#include "vtkImageData.h"
#include "vtkMetaImageWriter.h"

int main(int argc, char* argv[])
{
    // 输入DICOM数据路径
    std::string inputPath = "path/to/dicom/folder/";

    // 读取DICOM系列
    typedef itk::Image<unsigned short, 3> ImageType;
    typedef itk::ImageSeriesReader<ImageType> ReaderType;
    typedef itk::GDCMImageIO ImageIOType;
    typedef itk::GDCMSeriesFileNames NamesGeneratorType;

    ImageIOType::Pointer gdcmIO = ImageIOType::New();
    NamesGeneratorType::Pointer namesGenerator = NamesGeneratorType::New();
    namesGenerator->SetInputDirectory(inputPath);
    const ReaderType::FileNamesContainer & filenames = namesGenerator->GetInputFileNames();

    ReaderType::Pointer reader = ReaderType::New();
    reader->SetImageIO(gdcmIO);
    reader->SetFileNames(filenames);

    try
    {
        reader->Update();
    }
    catch (itk::ExceptionObject & ex)
    {
        std::cout << ex << std::endl;
        return EXIT_FAILURE;
    }

    // 将ITK数据转换为VTK数据
    typedef itk::ImageToVTKImageFilter<ImageType> FilterType;
    FilterType::Pointer filter = FilterType::New();
    filter->SetInput(reader->GetOutput());
    filter->Update();

    vtkSmartPointer<vtkImageData> imageData = vtkSmartPointer<vtkImageData>::New();
    imageData->ShallowCopy(filter->GetOutput());

    // 输出VTK数据
    vtkSmartPointer<vtkMetaImageWriter> writer = vtkSmartPointer<vtkMetaImageWriter>::New();
    writer->SetInputData(imageData);
    writer->SetFileName("output.mhd");
    writer->Write();

    return EXIT_SUCCESS;
}

需要注意的是，这只是一个简单的示例代码，实际使用中需要根据具体情况进行修改和完善。