NAME

       gdcminfo - Display meta info about the input DICOM file.

SYNOPSIS

       gdcminfo [options] [file-in/dir-in...]

DESCRIPTION

       The gdcminfo command line program takes as input a DICOM file, or a directory and process
       it to extract meta-information about the DICOM file(s) processed.

PARAMETERS

           file-in/dir-in   DICOM input filename/dirname

OPTIONS

   specific options
             -r --recursive          recursive traversal of an input directory
             -d --check-deflated     check if file is proper deflated syntax.
                --resources-path     Resources path.
                --md5sum             Compute md5sum of Pixel Data attribute value.
                --check-compression  check the encapsulated stream compression (lossless/lossy).

   general options
             -h   --help
                    print this help text and exit

             -v   --version
                    print version information and exit

             -V   --verbose
                    verbose mode (warning+error).

             -W   --warning
                    warning mode, print warning information

             -E   --error
                    error mode, print error information

             -D   --debug
                    debug mode, print debug information

   environment variable
       GDCM_RESOURCES_PATH path pointing to resources files (Part3.xml, ...)

SIMPLE USAGE

   gdcmData
       Using data from gdcmData:

           $ gdcminfo gdcmData/012345.002.050.dcm

           MediaStorage is 1.2.840.10008.5.1.4.1.1.4 [MR Image Storage]
           NumberOfDimensions: 2
           Dimensions: (256,256)
           Origin: (-85,21.6,108.7)
           Spacing: (0.664062,0.664062,1.5)
           DirectionCosines: (1,0,0,0,0,-1)
           Rescale Intercept/Slope: (0,1)
           SamplesPerPixel    :1
           BitsAllocated      :16
           BitsStored         :16
           HighBit            :15
           PixelRepresentation:1
           Orientation Label: CORONAL

   Davie Clunie datasets:
       Using data from David Clunie datasets:

           $ gdcminfo BRTUM001.dcm

           MediaStorage is 1.2.840.10008.5.1.4.1.1.4.1 [Enhanced MR Image Storage]
           NumberOfDimensions: 3
           Dimensions: (256,256,15)
           Origin: (40,-105,105)
           Spacing: (0.820312,0.820312,6)
           DirectionCosines: (0,1,0,0,0,-1)
           Rescale Intercept/Slope: (0,1)
           SamplesPerPixel    :1
           BitsAllocated      :16
           BitsStored         :16
           HighBit            :15
           PixelRepresentation:1
           Orientation Label: SAGITTAL

   Checking the md5sum of the Pixel Data
       After compressing a DICOM file (see gdcmconv) using a lossless compression algorithm, it
       is fairly easy to compare the two files for differences at DICOM attribute level. However
       one operation is slightly easier to do: how to make sure the compression was actually
       lossless ? In this case one could use the –md5sum operation.

       Take an uncompressed DICOM image file:

           $ gdcminfo --md5sum SIEMENS_ImageLocationUN.dcm

       The tool return: 0621954acd5815e0b4f7b65fcc6506b1

       Now compress this file:

           $ gdcmconv --jpegls SIEMENS_ImageLocationUN.dcm lossless_compressed.dcm

       and then check again the md5sum:

           $ gdcminfo --md5sum lossless_compressed.dcm

       The tool return: 0621954acd5815e0b4f7b65fcc6506b1

   Checking if Pixel Data is lossless
       In some environment one wish to check whether or not the DICOM file is lossless. It is
       fairly easy to do that in most cases. Only on two occasions this is not clear from the
       sole DICOM Attributes. When the Transfer Syntax is JPEG 2000 Image Compression
       (1.2.840.10008.1.2.4.91) and when the Transfer Syntax is JPEG-LS Lossy (Near-Lossless)
       Image Compression (1.2.840.10008.1.2.4.81).

       In this case, the only solution is to open the Pixel Data element, read the specific JPEG
       header and check whether or not the JPEG transformation was lossless or not:

           $ gdcminfo --check-compression gdcmData/MAROTECH_CT_JP2Lossy.dcm

       The tool returns: "Encapsulated Stream was found to be: lossy"

       Pay attention that this tool also checks the Image Lossy Compression attribute
       (0028,2110). This means --check-compression will also returns a value of lossy if a
       predecessor was found to be lossy compressed.

SEE ALSO

       gdcmdump(1), gdcmraw(1), gdcmconv(1)

AUTHOR

       Mathieu Malaterre
           Main developer

COPYRIGHT

       Copyright © 2006, 2011 Mathieu Malaterre