DICOM PS3.5 2018b - Data Structures and Encoding

7.4.4 Type 2C Conditional Data Elements
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### 7.4.4 Type 2C Conditional Data Elements

IODs and SOP Classes define Type 2C elements that have the same requirements as Type 2 elements under certain specified conditions. It is a protocol violation if the specified conditions are met and the Data Element is not included.

When the specified conditions are not met, Type 2C elements shall not be included in the Data Set.

### Note

An example of a Type 2C Data Element is Inversion Time (0018,0082). For several SOP Class Definitions, this Data Element is required only if the Scanning Sequence (0018,0020) has the Value "IR." It is not required otherwise. See PS3.3.

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DICOM PS3.5 2018b - Data Structures and Encoding