Comments on DICOM Data Dictionary 2006 - DICOM

This is a discussion on Comments on DICOM Data Dictionary 2006 - DICOM ; Hello there, I have some questions about the latest version of the DICOM dictionary. Please correct anything you think is a wrong assertion: 1) Two tags are missing: ACR NEMA, Tag: 0020 1003/1005 1. 0020 1003 IS 1 Images in ...

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  1. Comments on DICOM Data Dictionary 2006

    Hello there,

    I have some questions about the latest version of the DICOM
    dictionary. Please correct anything you think is a wrong assertion:

    1)
    Two tags are missing: ACR NEMA, Tag: 0020 1003/1005
    1. 0020 1003 IS 1 Images in Series (RET)
    2. 0020 1005 IS 1 Images in Study (RET)

    2)
    (4000,0010) should be "Text Arbitrary" instead of simply "Arbitrary"

    3)
    0018 0060 DS 1 KVP should be kVp

    4)
    Tags are not ordered correctly:

    * 0018 9295 FD 1 Chemical Shifts Minimum Integration Limit in ppm
    * 0018 9296 FD 1 Chemical Shifts Maximum Integration Limit in ppm

    5)
    * 2020 0010 US 1 Image Position
    should be:
    * 2020 0010 US 1 Image Box Position

    6)
    * 0012 0062 CS 1 Patient Identify Removed
    should be
    * 0012 0062 CS 1 Patient Identity Removed

    7)
    * 5000 2610 US 1 Referenced Overlay Group (RET)
    should be
    * 5000 2610 US 1 Curve Referenced Overlay Group (RET)

    Thanks,
    Mathieu

    Ref:
    http://gdcm.sourceforge.net/wiki/ind...ata_Dictionary


  2. Re: Comments on DICOM Data Dictionary 2006

    Hi Mathieu

    Thanks for the thorough review.

    Mathieu Malaterre wrote:

    > I have some questions about the latest version of the DICOM
    > dictionary. Please correct anything you think is a wrong assertion:
    >
    > 1)
    > Two tags are missing: ACR NEMA, Tag: 0020 1003/1005
    > 1. 0020 1003 IS 1 Images in Series (RET)
    > 2. 0020 1005 IS 1 Images in Study (RET)


    Actually, these do not seem to have ever been in ACR-NEMA
    (1985 or 1988) but were for some reason present in DICOM
    1993 but marked as retired in the dictionary. I will add
    them to 2007 to be sure that we do not re-use them.

    > 2)
    > (4000,0010) should be "Text Arbitrary" instead of simply "Arbitrary"


    In ACR-NEMA this actually was just "Arbitrary", so there is
    probably no reason to change it in the standard (even though
    in my own dicom3tools dictionary I entered it as Text Arbitrary
    for some reason).

    > 3)
    > 0018 0060 DS 1 KVP should be kVp


    Even though "kVP" is a better abbreviation from a physics
    perspective, it has been "KVP" since ACR-NEMA 1985 and is
    consistent throughout the standard, so I don't see any
    pressing reason to change this.

    > 4)
    > Tags are not ordered correctly:
    >
    > * 0018 9295 FD 1 Chemical Shifts Minimum Integration Limit in ppm
    > * 0018 9296 FD 1 Chemical Shifts Maximum Integration Limit in ppm


    You mean should be after (0018,9241) ?

    Fixed for 2007.

    > 5)
    > * 2020 0010 US 1 Image Position
    > should be:
    > * 2020 0010 US 1 Image Box Position


    "Image Position" is used consistently throughout the current
    standard, but unfortunately the name conflicts with the retired
    ACR-NEMA element (0020,0030) - in my dicom3tools dictionary I call
    it Image Box Position to prevent this conflict but to change it
    in the standard would require a CP; I will submit one.

    > 6)
    > * 0012 0062 CS 1 Patient Identify Removed
    > should be
    > * 0012 0062 CS 1 Patient Identity Removed


    Fixed for 2007.

    > 7)
    > * 5000 2610 US 1 Referenced Overlay Group (RET)
    > should be
    > * 5000 2610 US 1 Curve Referenced Overlay Group (RET)


    There is no conflict in the standard here that I can find,
    but it would be more consistent to rename it as you suggest,
    and it is retired so it doesn't really matter.

    > Ref:
    > http://gdcm.sourceforge.net/wiki/ind...ata_Dictionary


    The "extra" tags that you mention as being from dicom3tools
    are from ACR-NEMA PS 2 and from various CPs and Supplements
    to the 2006 files.

    David

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