Device Position to Equipment Mapping Matrix Attribute
| Tag | (3002,010F) |
|---|---|
| Type | Required (1) |
| Keyword | DevicePositionToEquipmentMappingMatrix |
| Value Multiplicity | 16 |
| Value Representation | Double (FD) |
A rigid, homogeneous 4x4 transformation matrix that maps the Image Receptor Coordinate System to the Equipment Coordinate System. Matrix elements shall be listed in row-major order.
See Section C.36.1.1.12.
Note
Part of the RT Image Frame Imaging Device Position Functional Group Macro with usage: M
Section C.36.1.1.12
C.36.1.1.12 Image Receptor Coordinate System
The Image Receptor Coordinate System describes the location of the image acquisition receptor device with respect to the Equipment Frame of Reference coordinate system identified by the Equipment Frame of Reference UID (300A,0675) , i.e. the Equipment Frame of Reference coordinate system is the parent system of the Image Receptor Coordinate System.
The Image Receptor Coordinate System is also used when describing the location of an acquisition plane of a virtual imaging device without presence of physical image receptor, e.g. in case of a digital reconstructed radiograph (DRR).
The Pixel Spacing (0028,0030) is measured on the x/y plane of the Image Receptor Coordinate System at z = 0.
The Device Position to Equipment Mapping Matrix (3002,010F) relates the two coordinate systems, and when it is identity:
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The origin of Image Receptor Coordinate System is located at the origin of the Equipment Frame of Reference coordinate system
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The axes of Image Receptor Coordinate System are aligned with the axes of the Equipment Frame of Reference coordinate system
The Image Receptor Coordinate System is aligned with the image receptor as follows.
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The z-axis passes through the center of the image receptor
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For rectangular receptors, the x-axis and y-axis are aligned with the edges of the image receptor.
The alignment shall be documented in the Conformance Statement for the device.