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1、BRITISH STANDARD BS ISO 17432:2004 Health informatics Messages and communication Web access to DICOM persistent objects ICS 35.240.80 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:55:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 17432:2004 This British Standard was published und
2、er the authority of the Standards Policy and Strategy Committee on 3 October 2005 BSI 3 October 2005 ISBN 0 580 46653 1 National foreword This British Standard reproduces verbatim ISO 17432:2004 and implements it as the UK national standard. The UK participation in its preparation was entrusted to T
3、echnical Committee IST/35, Health informatics, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be fou
4、nd in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are resp
5、onsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep
6、UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 17 and a back cover. The BSI copyright notice displ
7、ayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:55:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 17432:2004(E) INTERNATIONAL STANDARD ISO 17432
8、First edition 2004-12-15 Health informatics Messages and communication Web access to DICOM persistent objects Informatique de sant Messages et communication Accs au web pour les objets persistants DICOM BS ISO 17432:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:55:59 GMT+00:00 2006,
9、 Uncontrolled Copy, (c) BSI ii Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:55:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iii Contents Page Forewordiv Introduction v 1 Scope1 2 Normative references .1 3 Terms and definitions.2 4 Symbols and abbreviated terms2 5 Data communication Req
10、uirements3 5.1 Interaction3 5.2 HTTP request.3 5.3 HTTP Response.4 6 Persistent object types.5 6.1 General.5 6.2 Single frame image objects5 6.3 Multi-frame image objects5 6.4 Text objects .6 6.5 Other objects.6 7 Parameters.7 7.1 Parameters available for all DICOM persistent objects 7 7.2 Parameter
11、s for DICOM single frame and multi-frame image persistent objects only .9 Annex A (informative) URL/URI transfer syntax13 Annex B (informative) Examples.15 Annex C (informative) Applications16 Annex D (informative) IANA Mapping.17 BS ISO 17432:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov
12、 26 02:55:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 17432:2004 iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO
13、 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates cl
14、osely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Dr
15、aft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this doc
16、ument may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 17432 was prepared by Technical Committee ISO/TC 215, Health informatics in liaison with DICOM and is equivalent to DICOM Part 18, Supplement 85. Licensed Copy: sheffieldun
17、 sheffieldun, na, Sun Nov 26 02:55:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 17432:2004 v Introduction The DICOM standard is well accepted in the medical imaging area, including radiology, cardiology, pathology, radiotherapy as well as specialities using visible light imaging equipment (e
18、.g. endoscopes, microscopes). The requesters of medical imaging studies and care providers require rapid and reliable access to reports and images. Within computerized environments such access is increasingly based on web technologies. Access to relevant DICOM persistent objects is required without
19、the need for duplication of such data objects. Clinicians need to have access either to the original data in native DICOM format that allows extensive manipulation using specialized software which makes use of the detailed DICOM meta-data, or rendered into a generic format (e.g. JPEG, PDF) that can
20、be presented with off-the-shelf applications. This International Standard specifies the means whereby a request for access to a DICOM persistent object is to be expressed as an HTTP URL/URI (see IETF RFC2396) request which includes a pointer to a specific DICOM persistent object in the form of its i
21、nstance UID. The request also specifies the format of the result to be returned in response to the request. Examples include: a) (MIME) content-type (e.g. application/dicom or image/jpeg for images, application/dicom or application/rtf or xml for reports); b) content-encodings; c) reports as HL7/CDA
22、 Level 1. The parameters of the query URL as defined within this International Standard are sufficient for the HTTP server to act as a DICOM SCU (Service Class User) to retrieve the requested object from an appropriate DICOM SCP (Service Class Provider) using baseline DICOM functionality as defined
23、in DICOM PS 3.4 and DICOM PS 3.7. Specifications of requirements for additional DICOM persistent objects and formats for the responses from the server will be produced in the future as required. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:55:59 GMT+00:00 2006, Uncontrolled Copy, (c) BS
24、I blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:55:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 1 Health informatics Messages and communication Web access to DICOM persistent objects 1 Scope This International Standard specifies a web-based service for accessing and presenting DIC
25、OM (Digital Imaging and Communications in Medicine) persistent objects (e.g. images, medical imaging reports). This is intended for distribution of results and images to healthcare professionals. It provides a simple mechanism for accessing a DICOM persistent object from HTML pages or XML documents,
26、 through HTTP/HTTPs protocol, using DICOM UIDs (Unique Identifiers). Data may be retrieved either in a presentation-ready form as specified by the requester (e.g. JPEG or GIF) or in a native DICOM format. This International Standard does not support facilities for web searching of DICOM images. It r
27、elates only to DICOM persistent objects (not to other DICOM objects or to non-DICOM objects). Access control beyond the security mechanisms generally available to web applications is outside the scope of this International Standard. NOTE Systems claiming conformance to this International Standard sh
28、all function in accordance with all its mandatory clauses. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (in
29、cluding any amendments) applies. ISO/IEC 10918-2:1995, Information technology Digital compression and coding of continuous-tone still images: Compliance testing DICOM PS 3.3, Digital Imaging and Communications in Medicine, Information Object Definitions DICOM PS 3.4, Digital Imaging and Communicatio
30、ns in Medicine, Service Class Specifications DICOM PS 3.5, Digital Imaging and Communications in Medicine, Data Structures and Encoding DICOM PS 3.6, Digital Imaging and Communications in Medicine, Data Dictionary DICOM PS 3.7, Digital Imaging and Communications in Medicine, Message Exchange DICOM P
31、S 3.10, Digital Imaging and Communications in Medicine, Media Storage and File Format for Data Interchange DICOM PS 3.11, Digital Imaging and Communications in Medicine, Media Storage Application Profiles DICOM PS 3.14, Digital Imaging and Communications in Medicine, Grayscale Standard Display Funct
32、ion DICOM PS 3.15, Digital Imaging and Communications in Medicine, Security Profiles HL7 CDA, Health Level Seven, Clinical Document Architecture (CDA) BS ISO 17432:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:55:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 IETF RFC2045 et seq.,
33、MIME Multipurpose Internet Mail Extension IETF RFC2396, Uniform Resource Identifiers (URI): Generic Syntax IETF RFC2616, Hypertext Transfer Protocol HTTP/1.1 IETF RFC3240, Application/dicom MIME Sub-type Registration 3 Terms and definitions For the purposes of this document, the following terms and
34、definitions apply. 3.1 DICOM persistent object instance of a data object as defined by DICOM PS 3.3, which has been allocated a unique identifier in the format specified for SOP Instance UID in DICOM PS 3.3 and has been chosen as an object to be saved securely for some period of time NOTE Within the
35、 DICOM Standard, a DICOM Persistent Object is referred to as a Composite Service Object Pair (SOP) Instance. 3.2 web client system system using internet technologies (web, e-mail) interested in retrieving DICOM persistent objects from a web enabled DICOM server, through HTTP/HTTPs protocol 3.3 web e
36、nabled DICOM server system managing DICOM persistent objects and able to transmit them on request to the web client system 3.4 web access to DICOM persistent objects service enabling the web client system to retrieve DICOM persistent objects managed by a web enabled DICOM server, through HTTP/HTTPs
37、protocol 4 Symbols and abbreviated terms DICOM Digital Imaging and Communications in Medicine HL7 Health Level Seven HTML HyperText Markup Language HTTP HyperText Transfer Protocol HTTPs HyperText Transfer Protocol, secured MIME Multipurpose Internet Mail Extensions SOP Service Object Pair UID Uniqu
38、e (DICOM) Identifier URL/URI Uniform Resource Locator/Identifier XML eXtensible Markup Language BS ISO 17432:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:55:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3 5 Data communication requirements 5.1 Interaction The interaction shall be as
39、 shown in Figure 1. Figure 1 Interaction diagram 5.2 HTTP request 5.2.1 Method The HTTP request shall use the GET method as defined in IETF RFC2616. 5.2.2 Parameters of the HTTP request The parameters of the component of the request-URI to be sent to the web server through the HTTP GET method reques
40、t shall be represented as defined in IETF RFC2396. NOTE 1 Other components of the request-URI depend on the configuration, e.g. location and script language of the web enabled DICOM server. NOTE 2 The means by which the web client system obtains the value of the necessary parameters for web accessin
41、g of DICOM objects is out of the scope of this International Standard. 5.2.3 List of media types supported in the response The “Accept” field of the GET method request shall specify the media type(s) acceptable to the web client system. The(se) media type(s) shall include at least the items of the l
42、ist of MIME (see IETF RFC2045) types specified in Clause 6 devoted to the DICOM persistent object types. NOTE Typically the “Accept” field will be sent by a web client as “*/*”. An optional parameter specifies the MIME type(s) preferred by the web client, as a subset of those specified in the “Accep
43、t” field. BS ISO 17432:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:55:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 5.2.4 List of character sets supported in the response The “Accept-charset” field of the GET method request shall specify the character set of the object to be ret
44、rieved. If the “Accept-charset” field of the GET method is not present, or the web enabled DICOM server does not support the specified character set, the character set of the response will be at the discretion of the web enabled DICOM server. NOTE Typically, the user of a web client does not have co
45、ntrol over the “Accept-charset” field. An optional parameter specifies the character set to be used in the returned object. 5.3 HTTP Response 5.3.1 General The response shall be an HTTP response message as specified in IETF RFC2616. NOTE The content of the message-body varies according to the MEDIA
46、type as defined in 5.3.2.2 and 5.3.4.2. 5.3.2 Body of single DICOM MIME sub-type part response 5.3.2.1 MIME Type The MIME type shall be “application/dicom”, as specified in IETF RFC3240 and DICOM PS 3.11. 5.3.2.2 Content The body content shall be a “Part 10 File” which includes a meta-header as defi
47、ned in DICOM PS 3.10. 5.3.3 Transfer syntax The returned DICOM object shall be encoded using one of the transfer syntaxes specified in the transfer syntax query parameter as defined in 7.2.12. By default, the transfer syntax shall be “Explicit VR Little Endian”. NOTE This implies that retrieved imag
48、es are sent un-compressed by default. 5.3.4 Body of non-DICOM MIME type response 5.3.4.1 MIME Type The MIME type shall be one of the MIME types defined in the contentType parameter, preferably the most desired by the web client, and shall be in any case compatible with the “Accept” field of the GET
49、method. NOTE The HTTP behaviour is that an error (406 not acceptable) is returned if the required content type cannot be served. 5.3.4.2 Content The content shall be a single MIME part containing the object to be retrieved. NOTE Multiple objects in a response are not supported by this International Standard. The parameters select only a single object to retrieve. Most current web clients are able to retrieve single objects, within a “non-multipart” MIME body, and are not able to support mul