DICOM PS3.12 2019c - Media Formats and Physical Media for Media Interchange

L RFC3240 - Digital Imaging and Communications in Medicine (dicom) - Application/dicom MIME Sub-type Registration (Informative)

Network Working Group                                          D. Clunie
Request for Comments: 3240                                 E. Cordonnier
Category: Informational                                  DICOM Committee
                                                           February 2002


        Digital Imaging and Communications in Medicine (DICOM) -
              Application/dicom MIME Sub-type Registration

Status of this Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2002).  All Rights Reserved.

Abstract

   This document describes the registration of the MIME sub-type
   application/dicom (Digital Imaging and Communications in Medicine).
   The baseline encoding is defined by the DICOM Standards Committee in
   "Digital Imaging and Communications in Medicine".

1. DICOM Definition

   Digital Imaging and Communications in Medicine (DICOM) specifies
   protocols and formats for the exchange of images, time-based
   waveforms, reports, and associated information for medical
   applications.

   Individual DICOM objects (such as images) may be encapsulated in
   files and exchanged by e-mail using the Media Type defined herein.
   In addition, a set of DICOM files may be described by an index file,
   DICOMDIR, which may accompany the files that it references.

2.  IANA Registration

   MIME media type name: Application

   MIME subtype name: dicom

Required parameters:

      "id" is constructed from a DICOM File ID (see DICOM PS3.11).  The
      total length is limited to 71 characters.  Each component is
      limited to 8 characters.  The delimiter is a forward slash "/".
      There is never a leading delimiter (i.e., this is not a
      traditional path from a root directory).

      If a DICOMDIR (which provides an index of files) is included, then
      it will refer to other DICOM files in the file set by use of this
      File ID.  The File ID is not encoded within each DICOM file.  If a
      DICOMDIR is not present, then the "id" parameter may be absent.
      Note that the DICOMDIR will also have a Media Type of
      application/dicom and is distinguished from other files by its ID
      of "DICOMDIR".

      For example:
       "ROOTDIR/SUBDIR1/MRSCAN/A789FD07/19991024/ST00234/S00003/I00023"

      Each component shall be character strings made of characters from
      a subset of the G0 repertoire of ISO 8859.  This subset consists
      of uppercase alphabetic characters, numeric characters and
      underscore.  The following characters are permissible:

      A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V,
      W, X, Y, Z (uppercase)
      1, 2, 3, 4, 5, 6, 7, 8, 9, 0 and _ (underscore)

   Optional parameters:

      none

   Encoding considerations:

      The DICOM information is binary, therefore the encoding used shall
      support lossless transfer of binary information.  Typically, the
      Content-Transfer-Encoding would be set to "Base64".

      Multiple DICOM parts should be included as a Multipart/related
      entity [2387].  Receiving agents shall also support multiple parts
      as a Multipart/mixed entity.  When multiple DICOM parts are
      included, one of the parts may be a DICOMDIR, in which case, all
      the files referred to by the DICOMDIR shall also be present.  The
      DICOMDIR is not required to be the first Application/dicom part
      encoded in the message, in which case the optional "start"
      parameter should refer to the content-id of the part containing
      the DICOMDIR.

      Multiple DICOM Application/dicom parts may be included with other
      types of parts as a Multipart/mixed entity.

   Security considerations:

      Application/dicom parts contain medical information, including
      individual demographic information.  Accordingly, their exchange
      should be restricted to a secure network or within a secure
      wrapper that protects a patient's right to confidentiality
      according to local and national policy.  The specific security
      mechanisms are outside the scope of this proposal.  Such
      mechanisms as Secured MIME (S/MIME) [2633] or similar might be
      appropriate.

   Interoperability considerations:

      Because DICOM information is specific to the medical (imaging)
      domain, generic e-mail applications may not be able to interpret
      the information.

      The Media Type has been designed in order to allow for

      (i)   DICOM aware applications to interoperate,
      (ii)  generic applications to save the files in a form
            recognizable as DICOM files, that a DICOM application may
            subsequently use.

   Published specification:

      The Digital Imaging and Communications in Medicine (DICOM)
      Standard is a standard of the DICOM Standards Committee, published
      by the National Electrical Manufacturers Association (NEMA), 1300
      N. 17th Street, Rosslyn, Virginia 22209 USA,
      (http://medical.nema.org).

   Applications which use this media:

      Biomedical imaging applications.

   Additional information:

      1. Magic number(s): "DICM" after 128 byte preamble indicates DICOM
                            PS 3.10 file

      2. File extension(s): ".dcm" is recommended for files saved to
                              disk (other than DICOMDIR)

      3. Macintosh file type code:  Macintosh File Type "DICM" is
                                     recommended

      4. Object Identifiers: none

   Person to contact for further information:

      1. Name: Howard Clark
      2. E-mail: how_clark@nema.org

   Intended usage:

      Common

      Interchange of biomedical images.

   Author/Change controller:

      DICOM Standards Committee

3. References

   [DICOM]  DICOM Standards Committee, "Digital Imaging and
            Communications in Medicine", 2001.

   [2387]   Levinson, E., "The MIME Multipart/Related Content-type", RFC
            2387, August 1998.

   [2633]   Ramsdell, B., "S/MIME Version 3 Message Specification", RFC
            2633, June 1999.

4. Authors' Addresses

   David Clunie
   RadPharm
   943 Heiden Road
   Bangor PA 18013
   USA

   Phone: +1-570-897-7123
   Fax:   +1-425-930-0171
   EMail: dclunie@dclunie.com


   Emmanuel Cordonnier
   Etiam
   20 rue du Pr J. Pecker
   35000 Rennes
   France

   Phone: +33(0)299 14 33 88
   Fax:   +33(0)299 14 33 80
   EMail: emmanuel.cordonnier@etiam.com

5.  Full Copyright Statement

   Copyright (C) The Internet Society (2002).  All Rights Reserved.

   This document and translations of it may be copied and furnished to
   others, and derivative works that comment on or otherwise explain it
   or assist in its implementation may be prepared, copied, published
   and distributed, in whole or in part, without restriction of any
   kind, provided that the above copyright notice and this paragraph are
   included on all such copies and derivative works.  However, this
   document itself may not be modified in any way, such as by removing
   the copyright notice or references to the Internet Society or other
   Internet organizations, except as needed for the purpose of
   developing Internet standards in which case the procedures for
   copyrights defined in the Internet Standards process must be
   followed, or as required to translate it into languages other than
   English.

   The limited permissions granted above are perpetual and will not be
   revoked by the Internet Society or its successors or assigns.

   This document and the information contained herein is provided on an
   "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
   TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
   BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
   HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

Acknowledgment

   Funding for the RFC Editor function is currently provided by the
   Internet Society.

L.2 Example 1: Simple DICOM File MIME Message (Informative)

From: "Dr Smith" <smith@provider1.com>
To: "Dr Johnson" <johnson@provider2.com>
Subject: test DICOM Mime Type
Date: Fri, 5 Nov 1999 15:15:35 +0100
MIME-Version: 1.0
Content-Type: Multipart/mixed;
	boundary="----=_NextPart_000_0027_01BF27A0.9BE21980"

This is a multi-part message in MIME format.

------=_NextPart_000_0027_01BF27A0.9BE21980
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit

Message text: this is a DICOM MIME Type example for DICOM File.

------=_NextPart_000_0027_01BF27A0.9BE21980
Content-Type: Application/dicom;
	id="i00023"; name="i00023.dcm"
Content-Transfer-Encoding: base64
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=

------=_NextPart_000_0027_01BF27A0.9BE21980--
DICOM PS3.12 2019c - Media Formats and Physical Media for Media Interchange