• JPEG 2000 Part 2 Multicomponent Sample DICOM

    From Subhashree Ravichandran@21:1/5 to All on Wed Aug 11 16:02:38 2021
    Does anyone know how I can find DICOM studies with the 2 transfer syntaxes?

    1.2.840.10008.1.2.4.93 - JPEG 2000 Part 2 Multicomponent Image Compression

    1.2.840.10008.1.2.4.92 - JPEG 2000 Part 2 Multicomponent Image Compression (Lossless Only)

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  • From David Gobbi@21:1/5 to All on Thu Aug 12 06:19:07 2021
    If you have the studies as a set of files on disk (either with or without a DICOMDIR), then this is possible with my "dicomtools" package of command-line tools, which can be downloaded here:

    https://github.com/dgobbi/vtk-dicom/releases

    and which are documented here:

    https://github.com/dgobbi/vtk-dicom/wiki/Command-Line-Tools

    Or, if you use linux, it can be installed on debian via "apt-get install vtk-dicom-tools".

    For the task of finding studies with a particular attribute that exist in subdirectories of your current directory, the following will build a spreadsheet showing the TransferSyntaxUID as well as other basic information for each study. The "--study"
    option indicates a search at the study level, and "." indicates a search from the current directory.

    dicomtocsv -o spreadsheet.csv --study . -k TransferSyntaxUID=1.2.840.10008.1.2.4.93 -k AccessionNumber -k StudyID -k StudyDescription -k StudyInstanceUID -k ReferencedFileID

    The "dicomfind" command-line tool is even more powerful, in that it can find dicom files with certain attributes and then run another command-line tool on them (for example, to find and decompress any files with a certain transfer syntax).

    My apologies if I've misunderstood your question.

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  • From Subhashree Ravichandran@21:1/5 to All on Thu Aug 12 09:53:27 2021
    I am looking for ways to obtain sample DICOMs for these two transfer syntaxes or convert an existing DICOM to these two transfer syntaxes.

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  • From David Gobbi@21:1/5 to All on Thu Aug 12 10:46:57 2021
    Looks like I totally misunderstood! I've never seen these transfer syntaxes, just plenty of JPEG 2000 Part 1 files. And a search of this group indicates that other people have searched unsuccessfully, too. The most recent news I could find on JPEG
    2000 Part 2 DICOM files was an Aware Inc. white paper from 2013. Perhaps they are the only ones who have fully implemented this part of the standard.

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  • From Subhashree Ravichandran@21:1/5 to All on Thu Aug 12 14:36:20 2021
    Thanks David.

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  • From Mathieu Malaterre@21:1/5 to david...@gmail.com on Mon Aug 23 00:58:48 2021
    On Thursday, August 12, 2021 at 7:46:59 PM UTC+2, david...@gmail.com wrote:
    Looks like I totally misunderstood! I've never seen these transfer syntaxes, just plenty of JPEG 2000 Part 1 files. And a search of this group indicates that other people have searched unsuccessfully, too. The most recent news I could find on JPEG 2000
    Part 2 DICOM files was an Aware Inc. white paper from 2013. Perhaps they are the only ones who have fully implemented this part of the standard.

    Just for later reference, DICOM does not require a full implementation of Part2 of JPEG 2000, basically you only need the MCT extension:

    * http://dicom.nema.org/medical/dicom/current/output/chtml/part05/sect_A.4.4.html

    Luckily OpenJPEG does implement this Part 2 extension, so any DICOM toolkit built on top of OpenJPEG should support those Transfer Syntaxes.

    2cts

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