DICOM PS3.3 2022c - Information Object Definitions

7.13.6 Inventory

Figure 7.13.6-1 shows the E-R diagram for the Inventory Information Model. The Inventory Information Entity provides an Inventory of Studies, and their component Series and SOP Instances, managed by a repository (such as a Picture Archiving and Communication System - PACS). The Inventory Information Model includes contextual information about each Study through the Patient and Imaging Service Request IEs. It includes information on the stored SOP Instances, including access mechanisms supported by the repository.


  1. This information model is similar to the Study Root Query/Retrieve Information Model (see Section C.6.2.1 in PS3.4).

  2. There is a potentially complex relationship between the Study and Imaging Service Requests in the real world (e.g., see [IHE RAD TF-2] Section Relationship between Scheduled and Performed Procedure Steps). However, the Inventory Information Model follows the basic Study Information Model and supports only a single Accession Number representing an Imaging Service Request (see Section C.7.2.1). Note that if a Study has multiple associated Imaging Service Requests, the request Attributes may be encoded at the Series level.

Inventory Information Model E-R Diagram

Figure 7.13.6-1. Inventory Information Model E-R Diagram

DICOM PS3.3 2022c - Information Object Definitions