Incorporated Inventory Instance Sequence Attribute
| Tag | (0008,0422) |
|---|---|
| Type | Conditionally Required (1C) |
| Keyword | IncorporatedInventoryInstanceSequence |
| Value Multiplicity | 1 |
| Value Representation | Sequence (SQ) |
Inventory SOP Instances whose content is included by reference. See Section C.38.1.1.5.
Required if the referenced Inventory SOP Instance itself includes Inventory SOP Instances by reference.
One or more Items shall be included in this Sequence.
Section C.38.1.1.5
C.38.1.1.5 Incorporated Inventory Instance Sequence
For implementation specific reasons, the content of an Inventory may be divided into more than one Inventory SOP Instance. The Inventory SOP Instances are organized as a tree of referenced SOP Instances, with one SOP Instance as the root. The Incorporated Inventory Instance Sequence (0008,0422) specifies the links from an Inventory SOP Instance to its subsidiary Instances in the tree. The Incorporated Inventory Instance Sequence (0008,0422) definition recursively includes itself, thus allowing representation of the complete tree of referenced Inventory SOP Instances.
Inventory SOP Instances that are incorporated by reference shall have the same Inventory Level (0008,0403) as the current SOP Instance.
The inclusion of an Inventory SOP Instance reference in the Incorporated Inventory Instance Sequence (0008,0422) means that the Items of the Inventoried Studies Sequence (0008,0423) in that referenced SOP Instance are logically included in the current SOP Instance. Therefore, all inventoried Studies in the referenced SOP Instances shall be within the Scope of Inventory of the current SOP Instance. However, the Item Inventory DateTime (0008,0404) of those Study records may be prior to the Content Date (0008,0023) and Content Time (0008,0033) of the current SOP Instance.
Note
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Reasons for splitting an Inventory might include practical limits on the maximum size of an individual SOP Instance, parallel processing across multiple separate subsystems, or reuse of historical Inventories. See Section YYYY.3.3 “Inventory Instance Tree” in PS3.17.
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These requirements apply to every Inventory SOP Instance. Thus, each Inventory SOP Instance will include in its Incorporated Inventory Instance Sequence (0008,0422) the complete tree of references to the subtree of which it is the root.