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+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 encapulsated 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
+
+
+
+
+
+
+
+
+Clunie, et al. Informational [Page 1]
+
+RFC 3240 Application/dicom MIME Sub-type Registration February 2002
+
+
+ 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 permissable:
+
+ 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.
+
+
+
+
+Clunie, et al. Informational [Page 2]
+
+RFC 3240 Application/dicom MIME Sub-type Registration February 2002
+
+
+ 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)
+
+
+
+
+
+Clunie, et al. Informational [Page 3]
+
+RFC 3240 Application/dicom MIME Sub-type Registration February 2002
+
+
+ 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.
+
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+Clunie, et al. Informational [Page 4]
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+RFC 3240 Application/dicom MIME Sub-type Registration February 2002
+
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+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
+
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+Clunie, et al. Informational [Page 5]
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+RFC 3240 Application/dicom MIME Sub-type Registration February 2002
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+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.
+
+Acknowledgement
+
+ Funding for the RFC Editor function is currently provided by the
+ Internet Society.
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+Clunie, et al. Informational [Page 6]
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