ITK-读取系列DICOM并打印tags

#include "itkImageSeriesReader.h"
#include "itkGDCMImageIO.h"
#include "itkGDCMSeriesFileNames.h"

int main(int argc, char *argv[]) {

    typedef signed short       PixelType;
    const unsigned int         Dimension = 3;

    typedef itk::Image< PixelType, Dimension >      ImageType;

    typedef itk::ImageSeriesReader< ImageType >     ReaderType;

    ReaderType::Pointer reader = ReaderType::New();
    typedef itk::GDCMImageIO       ImageIOType;
    ImageIOType::Pointer dicomIO = ImageIOType::New();
    reader->SetImageIO(dicomIO);

    typedef itk::GDCMSeriesFileNames     NamesGeneratorType;

    NamesGeneratorType::Pointer nameGenerator = NamesGeneratorType::New();

    nameGenerator->SetInputDirectory("../data/CT/CTP-dicom/17380000");

    typedef std::vector<std::string>    FileNamesContainer;
    FileNamesContainer fileNames = nameGenerator->GetInputFileNames();

    reader->SetFileNames(fileNames);


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

    typedef itk::MetaDataDictionary   DictionaryType;

    const  DictionaryType &dictionary = dicomIO->GetMetaDataDictionary();

    typedef itk::MetaDataObject< std::string > MetaDataStringType;

    DictionaryType::ConstIterator itr = dictionary.Begin();
    DictionaryType::ConstIterator end = dictionary.End();

    while(itr != end) {
        itk::MetaDataObjectBase::Pointer  entry = itr->second;

        MetaDataStringType::Pointer entryvalue =
            dynamic_cast<MetaDataStringType *>(entry.GetPointer());

        if(entryvalue) {
            std::string tagkey   = itr->first;
            std::string tagvalue = entryvalue->GetMetaDataObjectValue();
            std::cout << tagkey <<  " = " << tagvalue << std::endl;
        }

        ++itr;
    }

    std::string entryId = "0010|0010";

    DictionaryType::ConstIterator tagItr = dictionary.Find(entryId);

    if(tagItr == end) {
        std::cerr << "Tag " << entryId;
        std::cerr << " not found in the DICOM header" << std::endl;
        return EXIT_FAILURE;
    }

    MetaDataStringType::ConstPointer entryvalue =
        dynamic_cast<const MetaDataStringType *>(tagItr->second.GetPointer());

    if(entryvalue) {
        std::string tagvalue = entryvalue->GetMetaDataObjectValue();
        std::cout << "Patient's Name (" << entryId <<  ") ";
        std::cout << " is: " << tagvalue << std::endl;
    } else {
        std::cerr << "Entry was not of string type" << std::endl;
        return EXIT_FAILURE;
    }
    return EXIT_SUCCESS;

}