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Study Retrieval

This page describes the implementation options of the Study Retrieval task.

Business View

The overall business scenarios associated to this task is described in the Business view page

Application View

The implementation-independent sequence diagrams associated to this task is described in the in the Application view page

Implementation pre-requisites

The Myhealth@EU general architecture requires that no assumptions are made on the way the service is implemented at the national level.

This implies that any solution adopted for the NCPeH to NCPeH communications has to work properly indipendently by the fact that a HL7 FHIR server, a DICOM sever, an XDS registry/repository or any other solution locally adopted.

Implementation

In this first version the Imaging Study Retrieval will be realized by searching per DocumentReference. For the implementation details please refer to the Document Retrieval page

The Imaging Study Information is treated in fact as a document, applying the same search/fetch approach described for the Document Retrieval. The advantage of this approach consist in the usage of a common retrieval mechanism that doesn't depend on the type of document retrieved or by its format. This approach is suitable for simple search mechanisms and requires that a DocumentReference instance is generated for each created document.

There are different ways to document the Study Information, using:

1. a DICOM Key Object Selection Document
2. Using a HL7 FHIR Bundle conveying an HL7 FHIR ImagingStudy, that describes the DICOM Study.

Details about how to have equivalent representation with these two opitons is documented in the IHE MADO profile.

Implementation alternatives

There are multiple other alternatives, not mutually exclusive, for searching, retrieving, or fetching Imaging Study Information, described only for documentation purposes in this version of this guide:

1. Querying directly using HL7 FHIR ImagingStudy, which allows for more flexible and lightweight queries.
2. use the DICOM QIDO-RS Query as defined in the IHE Web-based Image Access (WIA) RAD-129.

The following tags are of interest to be retrieved from the DICOM KOS metadata file, when used:

Alternative solutions or additional capabilities can be added in the future based on the inputs collected during the first pre-operation stages.