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CDA Reference in DICOM

CDA Reference in DICOM

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CDA Reference in DICOM

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  1. CDA Reference in DICOM WG20 Discussion 19-21 January 2004

  2. TheWork Item • CDA OID reference in DICOM • Use case: Provide access to relevant CDA documents to a DICOM-based application, such as pre-imaging-procedure lab test results, or patient advance medical directives, or an outpatient history and physical report. • Work Item: Define common method of referencing CDA documents in DICOM instances, including such new attributes in various objects as required to support CDA documents in the DICOM-based workflows.

  3. Use Locations • Modality Worklist • General Purpose Worklist • Relevant Information Sequence • C.17-3 Macro • Structured Report • Pertinent Other Evidence Sequence • C.17-3 Macro • Composite Object Reference Macro • SOP Class / Instance • DICOMDIR • SOP Class / Instance, File ID (name)

  4. C.17-3 Macro • Study / Series / SOP Class / Instance • Retrieve AE Tile (per Series) • Not appropriate for non-hierachical objects, or not collected in DICOM acquisition context • Hanging Protocol objects • Registration (Atlas) Frame of Reference • Advance medical directives (CDA) • Nursing notes (CDA)

  5. What do we need beyond a bare UID? SOP Class • Identification of object type • MIME type / sub-type • Identification of access service • URI Scheme: FTP, HTTP, … • Identification of access point • URI Authority • Identification of access string • URI Path or Query • May replicate OID if that is part of the access string? • Cf. HL7v2 RP, HL7v3 ED data types implicit C-MOVE AE Title Study/Series hierarchy

  6. Question: Do we want a CDA SOP Class? • Pro: Allows us to treat CDA documents in a DICOM context like other DICOM objects • E.g., in SR COMPOSITE Content Item • Con: Implies definition of a Service that will be used to operate on CDA documents • Rejoinder: The service does not necessarily need to be a DICOM Service • Comparable question wrt/ Registration FoR

  7. Options • Bare UID • SOP Class / Instance UIDs • UID with access attributes