############################################################################
#
#  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.
#
############################################################################

"""
Usage:

 python
"""

import gdcm
import sys

filename = sys.argv[1]
tmpfile = "/tmp/philips_rescaled.dcm"


# Need to access some private tags, read the file :
reader = gdcm.Reader()
reader.SetFileName( filename )
if not reader.Read():
  sys.exit(1)

ds = reader.GetFile().GetDataSet()

#print ds
# (2005,1409)     DS      4       0.0
# (2005,140a)     DS      16      1.52283272283272

# (2005,0014)     LO      26      Philips MR Imaging DD 005
tag1 = gdcm.PrivateTag(0x2005,0x09,"Philips MR Imaging DD 005")
tag2 = gdcm.PrivateTag(0x2005,0x0a,"Philips MR Imaging DD 005")
print tag1
print tag2

# make sure to do a copy, we want the private tag to remain
# otherwise gdcm gives us a reference
el1 = gdcm.DataElement( ds.GetDataElement( tag1 ) )
print el1
el2 = gdcm.DataElement( ds.GetDataElement( tag2 ) )
print el2

# (0028,1052) DS [-1000]                                  #   6, 1 RescaleIntercept
# (0028,1053) DS [1]                                      #   2, 1 RescaleSlope

el1.SetTag( gdcm.Tag(0x0028,0x1052) )
el2.SetTag( gdcm.Tag(0x0028,0x1053) )

ds.Insert( el1 )
ds.Insert( el2 )

w = gdcm.Writer()
w.SetCheckFileMetaInformation( False )
w.SetFileName( tmpfile )
w.SetFile( reader.GetFile() )
if not w.Write():
  sys.exit(1)

print "success"