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DICOM WG10 and ISO TC215 WADO Work Item Planning

DICOM WG10 and ISO TC215 WADO Work Item Planning. Joel Chabriais/Cor Loef co-chair DICOM Strategic Advisory Committee. One SOP Instance only in one call (no way for retrieving all the series/study) Suited for Web Browser based solution, less for direct with applications

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DICOM WG10 and ISO TC215 WADO Work Item Planning

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  1. DICOM WG10 and ISO TC215 WADO Work Item Planning Joel Chabriais/Cor Loef co-chair DICOM Strategic Advisory Committee

  2. One SOP Instance only in one call (no way for retrieving all the series/study) Suited for Web Browser based solution, less for direct with applications The URL based query is easy to write, but not adapted for being parsed No easy way to help the application development through WSDL Limitation of WADO

  3. IHE ITI wrote White Paper on WS implementation, based on WS-I The XDS.b Retrieve Document Set transaction is similar to WS/WADO All the WADO query parameters can be directly transposed « as is » in WS The response structure can be derived from the Retrieve Document Set structure WADO in WS, which form?

  4. WADO WS Interaction

  5. WADO WS Response

  6. WADO implies to have the reference A notification mechanism may be developed on WS (NADO) A Query by IDs mechanism may enable an application to obtain the reference (QIDO) WADO « brothers »

  7. WADO is supposing the Application retrieving the DICOM Object(s) is aware of it/their existence and availability. But no mechanism has been provided for informing the application that such DICOM Instance(s) are available. Similarly to the DICOM IAN (Instance Availability Notification), a WS based transaction may be defined for notifying the availability of DICOM Object(s). It addresses similar use cases than some targeted by the ISO TC215/WG2 “WARM” work item and it may correspond to an evolution of this one. The mechanism may imply a “subscription” by an application to be notified at different levels (study/series/instance) and the notification message may include, in addition to UIDS, at least the Patient Id, the Accession Number and the Modality. The Application may be implementing a WS server (so the DICOM system will act as a client to notify it) or as a WS client (so it has to query regularly or use the asynchronous mode of WS). NADO Notification of Availability of DICOM Objects

  8. Similarly to the IHE ITI Retrieve Document for Display (RID) transaction, the Application can query the DICOM server to have a list of available DICOM objects. Parameters may be similar to those used for RID (Patient ID, date(s) and number of most recent) with the Accession Number (in addition to the Patient ID required for security reasons). The Application will act as a WS client, while the DICOM Server will act as a WS server. QIDO Query based on ID for DICOM Objects

  9. Proposed Joint Approval DICOM Public Comment DICOM Ballot WG6 August 29th 2010 WG6 Aprilh 2011 WG6 March 2011 WADO-WS revised Supplement to Part 18 DICOM Part 18 WADO+ WADO-WS WADO-WS Supplement to Part 18 DICOM Part 18 45 days 49 days Reformat WADO-WS Supplement to Part 18 ISO-DIS WADO-WS + WADO ISO-IS WADO+ WADO-WS 15+150days 15+60days ISO WADO IS Authorize Issue of CD ? ISO CD Ballot ? ISO DIS Ballot TC215 May 2011 TC215 Plenary May, 13st 2010 2011 ??2011 April 9th 2011

  10. WADO-WS to be submitted to DICOM WG6 approval for public Comment release late August 2010. Need to organize the joint approval process between ISO TC215 and DICOM. Assumptions are: a single standard will be published that includes both WADO and WADO-WS in DICOM and ISO. Current WADO in DICOM (Part 18) and ISO (IS12974) need to be superseded by the combined existing WADO & new WADO-WS document when approved. WADO-WS Workitem

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