DICOM PS3.3 2019a - Information Object Definitions
C. Multi-energy CT Characteristics Macro

This Macro specifies the Attributes for CT Image Characteristics.

Table C. Multi-energy CT Characteristics Macro Attributes

Attribute Name



Attribute Description

Monoenergetic Energy Equivalent



Single energy equivalent in keV.

Required if Image Type (0008,0008) Value 4 is EQUAL to VMI. May be present otherwise.


If the Image Type Value 4 is (MAT_REMOVED, MAT_MODIFIED) and a VMI image was used as the source then this value reflects the keV value of the VMI image.

Derivation Algorithm Sequence



Software algorithm that performed the derivation.

>Include Table 10-19 “Algorithm Identification Macro Attributes”

Performed Processing Parameters Sequence



Parameters used to perform the derivation algorithm.


Implementers are encouraged to put the Algorithm Parameters here instead of in Algorithm Parameters (0066,0032) in the Algorithm Identification Macro

One or more items are permitted in this Sequence.

>Include Table 10.2.1-1 “Content Item with Modifiers Macro Attributes”

DICOM PS3.3 2019a - Information Object Definitions