Imaging Study Instance
The lowest level of the medical imaging hierarchy. Represents a single, individual file, such as one MRI or CT scan slice. Every instance is uniquely identified by an SOP Instance UID and is grouped into an Imaging Study Series, which is then grouped into an Imaging Study.
Attributes
| Attribute | Type | Multiplicity | Attribute note |
|---|---|---|---|
| Imaging Study Instance UID | Identifier | 1 | A unique identifier of an imaging study instance. |
| Imaging Study Instance SOP Class Code | Codeable Concept | 0..1 | Uniquely specifies the DICOM Class type (e.g., Computed Radiography Image Storage, CT Image Storage, Legacy Converted Enhanced CT Image Storage).
Value Set: To be developed. |
| Imaging Study Instance Number | Integer | 0..1 | The number of this instance in the series. |
Relationships
| From class | From multiplicity | Relationship | To class | To multiplicity |
|---|---|---|---|---|
| Imaging Study Series | 0..* | has (composition) | Imaging Study Instance | 0..* |
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How to cite:
Canadian Institute for Health Information. Imaging Study Instance. Accessed November 02, 2026.
