There are multiple applications, in which DICOM and "web-based" environments are interacting. "Web-based" means information and communication systems that are using Internet related technologies (Web, e-mail…). The basic feature supported by this standard is a mechanism for the "Web-based" system to retrieve a DICOM persistent object from the "DICOM-based" system.
Typical applications are:
Referencing an image or a report from an electronic patient record (EPR)
Including references to images in an e-mail
Providing access by outside referring doctors to a hospital web server that contains references to reports, images and waveforms
Providing access to anonymized DICOM reports, images and waveforms via a web server, for teaching purposes and for clinical trials.
To retrieve DICOM persistent objects using "WADO", the "web-based" system must "know" the UIDs (Study, Series, SOP Instance) of the objects it needs to retrieve. These may be obtained through different methods (reception of a standardized message containing a document containing the reference to the DICOM objects, query of other systems…) that are beyond the scope of this standard.