I am trying to understand the process of receiving images and how a PACS does to group the “dicom” files of a study received by the modality.
CT → PACS:
CR → PACS:
In such a case, how would PACS do to separate each file in your study?
Sorry if the question is too basic.
Thank you all!
A typical PACS would group studies according to the value of the “StudyInstanceUID” (0020,000d) tag of the DICOM instances.
This behavior can be observed if clicking on the “All studies” button at the welcome screen of Orthanc.
More information is available in the Orthanc Book:
As alternative to what Sébastien describes, the PACS can also use the accession number / order number to group studies.
An example is mammography. In some situations an digital mammography is extended with an ultrasound. These are two modalities and both will generate their Study UID. From a clinical/functional perspective they are one study and the PACS will display it as such by using the accession/order number. This behaviour is not supported by Orthanc and is not described in the DICOM standard.