C.7.6.16.2.13 Pixel Intensity Relationship LUT Macro

Table C.7.6.16-14 specifies the attributes of the Pixel Intensity Relationship LUT Functional Group macro.

Table C.7.6.16-14PIXEL INTENSITY RELATIONSHIP LUT MACRO ATTRIBUTES

Attribute Name Tag Type Attribute Description
Pixel Intensity Relationship LUT Sequence (0028,9422) 1 Defines a sequence of Pixel Intensity Relationship LUTs. One or more items shall be included in this sequence. At least one item with LUT Function (0028,9474) equals TO_LINEAR LUT shall be present if Pixel Intensity Relationship (0028,1040) equals LOG. Only a single item with LUT Function (0028,9474) equals TO_LINEAR LUT shall be present.
>LUT Descriptor (0028,3002) 1 Specifies the format of the LUT Data in this Sequence. See C.11.1.1 and C.7.6.16.2.13.1 for further explanation.
>LUT Data (0028,3006) 1 LUT Data in this Sequence.
>LUT Function (0028,9474) 1 The transformation function this LUT applies to the stored pixel values. Defined Terms: TO_LOG TO_LINEAR

C.7.6.16.2.13.1 Pixel Intensity Relationship LUT

The purpose of this Pixel Intensity Relationship LUT Sequence is to provide information to recalculate the pixel values proportional to the X-Ray beam intensity from the stored pixel values. It is intended to be used by any application that needs transformed pixel values (e.g. scaled back to acquired pixel values) pixel values for further processing and not as replacement of the Modality LUT in the display pipeline, see Figure C.7.6.16-7.

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Figure C.7.6.16-7Purpose of Pixel Intensity Relationship LUT

C.7.6.16.2.13.2 Pixel Intensity Relationship LUT Data Attribute

The number of bits in the LUT Data attribute (0028,3006) may be different from the value of Bit Stored attribute (0028,0101).