The usage of this macro is recommended to specify the derivation characteristics
Table FFF.2.4-10 XA/XRF FRAME CHARACTERISTICS MACRO Recommendations
|XA/XRF Frame Characteristics Sequence||(0018,9412)|
|>Derivation Description||(0008,2111)||Contains the description of the latest derivation process.|
|>Derivation Code Sequence||(0008,9215)||Contains as many items as derivation steps in this derivation process.|
|>Acquisition Device Processing Description||(0018,1400)||Specifies the derivation made at the acquisition system.|
|>Acquisition Device Processing Code||(0018,1401)||Specifies the derivation made at the acquisition system.|
If the image is derived from one or more SOP Instances, the XA/XRF Frame Characteristics Sequence always contains the same values as the last item of the Derivation Image Sequence.
If the image is derived but not from other SOP Instances, it means that the derivation was performed on the Acquisition system, and the Acquisition Device Processing Description (0018,1400) and the Acquisition Device Processing Code (0018,1401) contain the information of that derivation.
An image derived from a derived image will change the Derivation Description but not the Acquisition Device Processing Description.