Proposed WADO Enhanced URI API Timothy Culp提出WADO增强URI API提摩太卡尔普.pptVIP

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Proposed WADO Enhanced URI API Timothy Culp提出WADO增强URI API提摩太卡尔普.ppt

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Proposed WADO Enhanced URI API Timothy Culp提出WADO增强URI API提摩太卡尔普

WADO Enhanced URI Work Item timothy.culp@ DICOM WG-27 RSNA November 2011 Agenda Overview Open Issues Enhanced URI Request/Response ? Questions/Comments Overview Explain to everyone what we’ve done to get here… Open Issues Normalized Metadata Currently metadata will be returned using the same schema as WADO Web Services defined in PS3.19. It would be more efficient to return metadata in a normalized form when requesting it at the study or series level. WG-06 is submitting a multiframe work item that will address the normalization of metadata across a series or study. This supplement will inherit those changes when they become available. Open Issues (cont) Returning a list of SOP Instances Is there a standard way to represent a list in a URL? For returning a list of SOP Instances, are we going to concatenate the list of UIDs into the URL? Are there limitations on the the length of a URL? The URL could not be generated by hand but the intention for this interface is for enabling machine to machine transfers of data, not human to browser display. For purposes of this design, we suggest the following: To return a single instance (GET): /studies/{studyid}/series/{seriesid}/instances/{uid} To return a set of instances from a series (GET or POST): /studies/{studyid}/series/{seriesid}/instances{?uid1,uid2,uid3} Open Issues (cont) HTTP Accept Headers When requesting a study, series, or instances through the Enhanced URI Interface, the data can be returned as DICOM objects or zip file containing XML and/or binary. The format of the request is indicated in the HTTP Accept Header. The accept header will specify application/dicom for the former and application/wado for the latter. Open Issues (cont) Transfer Syntax Transfer syntax can also be part of the content negotiation since it is requesting the same information in another format. The response shall be the Transfer Syntax requested if possible. If it is not possible for the response to be sent using the request