GDCM 2.2.1

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ReadAndPrintAttributes.cxx
/*=========================================================================
Program: GDCM (Grassroots DICOM). A DICOM library
Copyright (c) 2006-2011 Mathieu Malaterre
All rights reserved.
See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
/*
* This small example will show how one can read and print
* a DICOM Attribute using different technique (by tag or by name)
*/
#include "gdcmReader.h"
#include "gdcmGlobal.h"
#include "gdcmDicts.h"
#include "gdcmDict.h"
#include "gdcmAttribute.h"
#include "gdcmStringFilter.h"
#include <iostream>
int main(int argc, char *argv[])
{
if( argc < 2 )
{
std::cerr << argv[0] << " input.dcm" << std::endl;
return 1;
}
const char *filename = argv[1];
// Instanciate the reader:
gdcm::Reader reader;
reader.SetFileName( filename );
if( !reader.Read() )
{
std::cerr << "Could not read: " << filename << std::endl;
return 1;
}
// The output of gdcm::Reader is a gdcm::File
gdcm::File &file = reader.GetFile();
// the dataset is the the set of element we are interested in:
gdcm::DataSet &ds = file.GetDataSet();
const gdcm::Global& g = gdcm::Global::GetInstance();
const gdcm::Dicts &dicts = g.GetDicts();
const gdcm::Dict &pubdict = dicts.GetPublicDict();
using namespace gdcm;
// In this example we will show why using name to lookup attribute can be
// dangerous.
Tag tPatientName(0x0,0x0);
//const DictEntry &de1 =
pubdict.GetDictEntryByName("Patient Name", tPatientName);
std::cout << "Found: " << tPatientName << std::endl;
// Indeed the attribute could not be found. Since DICOM 2003, Patient Name
// has become Patient's Name.
Tag tPatientsName;
//const DictEntry &de2 =
pubdict.GetDictEntryByName("Patient's Name", tPatientsName);
std::cout << "Found: " << tPatientsName << std::endl;
// Let's try to read an arbitrary DICOM Attribute:
Tag tDoseGridScaling;
//const DictEntry &de3 =
pubdict.GetDictEntryByName("Dose Grid Scaling", tDoseGridScaling);
std::cout << "Found: " << tDoseGridScaling << std::endl;
if( ds.FindDataElement( tDoseGridScaling ) )
{
gdcm::StringFilter sf;
sf.SetFile(file);
std::cout << "Attribute Value as String: " << sf.ToString( tDoseGridScaling ) << std::endl;
// Let's check the name again:
std::pair<std::string, std::string> pss
= sf.ToStringPair( tDoseGridScaling );
std::cout << "Attribute Name Checked: " << pss.first << std::endl;
std::cout << "Attribute Value (string): " << pss.second << std::endl;
//const DataElement &dgs = ds.GetDataElement( tDoseGridScaling );
// Let's assume for a moment we knew the tag number:
Attribute<0x3004,0x000e> at;
assert( at.GetTag() == tDoseGridScaling );
at.SetFromDataSet( ds );
// For the sake of long term maintenance, we will not write
// that this particular attribute is stored as a double. What if
// a user made a mistake. It is much safer to rely on GDCM internal
// mechanism to deduce the VR::DS type (represented as a ieee double)
Attribute<0x3004,0x000e>::ArrayType v = at.GetValue();
std::cout << "DoseGridScaling=" << v << std::endl;
}
return 0;
}