FFF.2.3.3.4.1 Usage of Pixel Shift Macro in Shared Context

In this example, the pixel shift –0.3\2.0 is applied to the frames 2 and 3 when they are subtracted to the mask frame 1 as defined in the Mask Subtraction Sequence.

Below are the encoded values of the key attributes of this example:

Mask Subtraction Sequence (0028,6100)
Item 1
>Mask Operation (0028,6101) = AVG_SUB
>Subtraction Item ID (0028,9416) = 100
>Applicable Frame Range (0028,6102) = 2\3
>Mask Frame Numbers (0028,6110) = 1
>Mask Operation Explanation (0028,6190) = Default Subtraction
Shared Functional Group Sequence (5200,9229)
Item 1 All the frames
>Frame Pixel Shift Sequence (0028,9415)
Item 1
Item 1
>Mask Operation (0028,6101) = AVG_SUB
>Subtraction Item ID (0028,9416) = 100
>Applicable Frame Range (0028,6102) = 2\3
>Mask Frame Numbers (0028,6110) = 1
>Mask Operation Explanation (0028,6190) = Left Leg
Per-Frame Functional Groups Sequence (5200,9230)
Item 1 Frame 1
>Frame Pixel Shift Sequence (0028,9415)
Item 1
>Frame Pixel Shift Sequence (0028,9415)
Item 1
>Frame Pixel Shift Sequence (0028,9415)
Item 1
Item 1
>Mask Operation (0028,6101) = AVG_SUB
>Subtraction Item ID (0028,9416) = 100
>Applicable Frame Range (0028,6102) = 2\3
>Mask Frame Numbers (0028,6110) = 1
>Mask Operation Explanation (0028,6190) = Left Leg
Item 2
>Mask Operation (0028,6101) = AVG_SUB
>Subtraction Item ID (0028,9416) = 101
>Applicable Frame Range (0028,6102) = 2\3
>Mask Frame Numbers (0028,6110) = 1
>Mask Operation Explanation (0028,6190) = Right Leg
Per-Frame Functional Groups Sequence (5200,9230)
Item 1 Frame 1
>Frame Pixel Shift Sequence (0028,9415)
Item 1
>Frame Pixel Shift Sequence (0028,9415)
Item 1
>Frame Pixel Shift Sequence (0028,9415)
Item 1
Image XA/XRF Acquisition C.8.19.3 Specifies system characteristics relevant for this scenario.

Table FFF.2. 4-2 ENHANCED XA IMAGE FUNCTIONAL GROUP MACROS

Functional Group Macro PS 3.3 Reference Usage
XA/XRF Frame Pixel Data Properties C.8.19.6.4 Specifies the pixel spacing on the receptor plane.
X-Ray Projection Pixel Calibration C.8.19.6.9 Specifies the calibration-specific attributes.
X-Ray Geometry C.8.19.6.14 Specifies the distances of the conic projection.