GDCM 2.2.1

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SimpleScanner.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.
=========================================================================*/
/*
* Simple example to show how to use Scanner API.
* It exposes the three different cases:
* - DICOM Attribute is present and has a value
* - DICOM Attribute is present and has no value
* - DICOM Attribute is not present at all
* It also shows the purpose of the function 'IsKey' to detect whether or
* not the file has been read by the gdcm::Scanner. Technically most of the time
* if a file is not a 'Key' this is because it is not a DICOM file. You need to use
* gdcm::System::FileExists to decide whether or not the file actually exist on the disk.
*
* It was tested on this particular image:
* ./SimpleScanner gdcmData/012345.002.050.dcm
*/
#include "gdcmScanner.h"
int main(int argc, char *argv[])
{
if( argc < 2 )
{
return 1;
}
const char *filename = argv[1];
const char filename_invalid[] = "this is a file that may not exist on this disk.dcm";
gdcm::Scanner s;
const gdcm::Tag tag_array[] = {
gdcm::Tag(0x8,0x50),
gdcm::Tag(0x8,0x51),
gdcm::Tag(0x8,0x60),
};
s.AddTag( tag_array[0] );
s.AddTag( tag_array[1] );
s.AddTag( tag_array[2] );
gdcm::Directory::FilenamesType filenames;
filenames.push_back( filename );
filenames.push_back( filename_invalid );
if( !s.Scan( filenames ) )
{
return 1;
}
//s.Print( std::cout );
if( s.IsKey( filename ) )
{
std::cout << "INFO:" << filename << " is a proper Key for the Scanner (this is a DICOM file)" << std::endl;
}
if( !s.IsKey( filename_invalid ) )
{
std::cout << "INFO:" << filename_invalid << " is not a proper Key for the Scanner (this is either not a DICOM file or file does not exist)" << std::endl;
}
gdcm::Scanner::TagToValue const &ttv = s.GetMapping(filename);
const gdcm::Tag *ptag = tag_array;
for( ; ptag != tag_array + 3; ++ptag )
{
gdcm::Scanner::TagToValue::const_iterator it = ttv.find( *ptag );
if( it != ttv.end() )
{
std::cout << *ptag << " was properly found in this file" << std::endl;
// it contains a pair of value. the first one is the actual tag, so the following is always true:
// *ptag == it->first
// The second part is the actual value (stored as RAW strings). You will have to reinterpret this string
// if VR for *ptag is not VR::VRASCII !
const char *value = it->second;
if( *value )
{
std::cout << " It has the value: " << value << std::endl;
}
else
{
std::cout << " It has no value (empty)" << std::endl;
}
}
else
{
std::cout << "Sorry " << *ptag << " could not be found in this file" << std::endl;
}
}
return 0;
}