This section illustrates the usage of the Color LUT in the context of a Parametric Map IOD with the Palette Color Lookup Table for the example described.
Table BBBB.2-1. Example data for the Floating Point Image Pixel Module
|
Attribute
|
Tag
|
Value
|
Comment
|
|
Samples per Pixel
|
(0028,0002)
|
1
|
|
|
Photometric Interpretation
|
(0028,0004)
|
COLOR_RANGE
|
|
|
Rows
|
(0028,0010)
|
41
|
|
|
Columns
|
(0028,0011)
|
32
|
This case is a non-square image
|
|
Bits Allocated
|
(0028,0100)
|
32
|
|
|
Pixel Aspect Ratio
|
(0028,0034)
|
1\1
|
|
|
Float Pixel Padding Value
|
(0028,0122)
|
-200
|
|
|
Float Pixel Padding Range Limit
|
(0028,0124)
|
-100
|
|
|
Float Pixel Data
|
(7FE0,0008)
|
(44 times) -150, -0.1356, 1.317, (28 times) -150, -0.986, 0.4402, -0.0251, 0.6077, 0.2982, 0.0872, 2.6927, 2.1434, -0.5543, -0.3014, -150 etc.
|
For convenience "," is used to separate the values, type is OF
|
Table BBBB.2-2. Example data for the Dimension Organization Module
|
Attribute
|
Tag
|
Value
|
Comment
|
|
Dimension Organization Sequence
|
(0020,9221)
|
|
|
|
>Dimension Organization UID
|
(0020,9164)
|
1.2.3.5.6
|
Sample UID
|
|
Dimension Organization Type
|
(0020,9311)
|
3D
|
|
|
Dimension Index Sequence
|
(0020,9222)
|
1
|
|
|
Item 1
|
First Item describing Stack ID
|
|
>Dimension Index Pointer
|
(0020,9165)
|
(0020,9056)
|
|
|
>Functional Group Pointer
|
(0020,9167)
|
(0020,9111)
|
|
|
>Dimension Organization UID
|
(0020,9164)
|
1.2.3.5.6
|
|
|
>Dimension Description Label
|
(0020,9421)
|
Stack ID
|
|
|
Item 2
|
Second Item describing In-Stack Position Number
|
|
>Dimension Index Pointer
|
(0020,9165)
|
(0020,9057)
|
|
|
>Functional Group Pointer
|
(0020,9167)
|
(0020,9111)
|
|
|
>Dimension Organization UID
|
(0020,9164)
|
1.2.3.5.6
|
|
|
>Dimension Description Label
|
(0020,9421)
|
In-Stack Position Number
|
|
Table BBBB.2-3. Example data for the Pixel Measures Macro
|
Attribute
|
Tag
|
Value
|
Comment
|
|
Pixel Measures Sequence
|
(0028,9110)
|
1
|
|
|
>Pixel Spacing
|
(0028,0030)
|
3.75\3.75
|
|
|
>Slice Thickness
|
(0018,0050)
|
5
|
|
Table BBBB.2-4. Example data for the Frame Content Macro
|
Attribute
|
Tag
|
Value
|
Comment
|
|
Frame Content Sequence
|
(0020,9111)
|
|
|
|
>Frame Acquisition Number
|
(0020,9156)
|
1
|
|
|
>Dimension Index Values
|
(0020,9157)
|
1\15
|
|
|
>Stack ID
|
(0020,9056)
|
1
|
|
|
>In-Stack Position Number
|
(0020,9057)
|
15
|
|
|
>Frame Comments
|
(0020,9158)
|
...
|
|
|
>Frame Label
|
(0020,9453)
|
...
|
|
Table BBBB.2-5. Example data for the Identity Pixel Value Transformation Macro
|
Attribute
|
Tag
|
Value
|
Comment
|
|
Pixel Value Transformation Sequence
|
(0028,9145)
|
|
Single item with fixed values
|
|
>Rescale Intercept
|
(0028,1052)
|
0
|
|
|
>Rescale Slope
|
(0028,1053)
|
1
|
|
|
>Rescale Type
|
(0028,1054)
|
US
|
|
Table BBBB.2-6. Example data for the Frame VOI LUT With LUT Macro
|
Attribute
|
Tag
|
Value
|
Comment
|
|
Frame VOI LUT Sequence
|
(0028,9132)
|
|
|
|
>Window Center
|
(0028,1050)
|
0
|
|
|
>Window Width
|
(0028,1051)
|
50
|
Covering -25 to 25
|
Table BBBB.2-7. Example data for the Real World Value Mapping Macro
|
Attribute
|
Tag
|
Value
|
Comment
|
|
Real World Value Mapping Sequence
|
(0040,9096)
|
|
|
|
>Double Float Real World Value First Value Mapped
|
(0040,9214)
|
-16.739
|
|
|
>Double Float Real World Value Last Value Mapped
|
(0040,9213)
|
21.434
|
|
|
>Real World Value Intercept
|
(0040,9224)
|
0
|
Identity transformation
|
|
>Real World Value Slope
|
(0040,9225)
|
1
|
Identity transformation
|
|
>Measurement Units Code Sequence
|
(0040,08EA)
|
|
|
|
>>Include
Table 8.8-1 "Code Sequence Macro Attributes"
|
|
(UCUM, {t}, "t")
|
|
|
>Quantity Definition Sequence
|
(0040,9220)
|
|
|
|
>>Include
Table 10-2 "Content Item Macro Attributes Description"
|
|
(113068, DCM, "Student's T-test")
|
|
The Palette Color Lookup Table used is the Spring Color Palette (see Figure BBBB.1-3 Resulting Color LUT Spring).
This can be described as follows through the Palette Color Lookup Table:
Red has a constant value of 255
Green has a linear segment that starts at 0 and ends at 255
Blue has a linear segment that starts at 255 and ends at 0
Using the Segmented Color Lookup Table all three can be described by a discrete segment with length 1 to specify the starting value (0,1,value) followed by a linear segment of length 255 with the end-value (1,255,end-value).
Table BBBB.2-8. Example data for the Palette Color Lookup Table Module
|
Attribute
|
Tag
|
Value
|
Comment
|
|
Red Palette Color Lookup Table Descriptor
|
(0028,1101)
|
256\0\8
|
|
|
Green Palette Color Lookup Table Descriptor
|
(0028,1102)
|
256\0\8
|
|
|
Blue Palette Color Lookup Table Descriptor
|
(0028,1103)
|
256\0\8
|
|
|
Segmented Red Palette Color Lookup Table Data
|
(0028,1221)
|
0,1,255,1,255,255
|
For convenience "," is used to separate the values, type is OW
|
|
Segmented Green Palette Color Lookup Table Data
|
(0028,1222)
|
0,1,0,1,255,255
|
For convenience "," is used to separate the values, type is OW
|
|
Segmented Blue Palette Color Lookup Table Data
|
(0028,1223)
|
0,1,255,1,255,0
|
For convenience "," is used to separate the values, type is OW
|
The values specifying the range to be mapped to the Color LUT are given by the Minimum Stored Value Mapped and the Maximum Stored Value mapped.
Table BBBB.2-9. Example data for the Stored Value Color Range Macro
|
Attribute
|
Tag
|
Value
|
Comment
|
|
Minimum Stored Value Mapped
|
(0028,1231)
|
-16.739
|
Corresponds to the first LUT entry (255,0,255).
|
|
Maximum Stored Value Mapped
|
(0028,1232)
|
21.434
|
Corresponds to the last LUT entry (255,255,0).
|
Table BBBB.2-10. Example data for the Parametric Map Frame Type Macro
|
Attribute
|
Tag
|
Value
|
Comment
|
|
Parametric Map Frame Type Sequence
|
(0040,9092)
|
|
|
|
>Frame Type
|
(0008,9007)
|
DERIVED\PRIMARY\FMRI\T_TEST
|
|
