A.40 Spatial Fiducials IOD
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## A.40 Spatial Fiducials IOD

### A.40.1 Spatial Fiducials IOD Description

The Fiducials IOD specifies the spatial relationship between the Composite Fiducial instance, to one or more images.

### A.40.2 Spatial Fiducials IOD Entity-Relationship Model

Figure A.40-1. Spatial Fiducials Information Object Definition E-R Model

### A.40.3 Spatial Fiducials IOD Module Table

Table A.40-1. Spatial Fiducials IOD Modules

IE | Module | Reference | Usage
--- | --- | --- | ---
Patient | Patient | C.7.1.1 | M
Clinical Trial Subject | C.7.1.3 | U
Study | General Study | C.7.2.1 | M
Patient Study | C.7.2.2 | U
Clinical Trial Study | C.7.2.3 | U
Series | General Series | C.7.3.1 | M
Clinical Trial Series | C.7.3.2 | U
Spatial Fiducials Series | C.21.1 | M
Equipment | General Equipment | C.7.5.1 | M
Spatial Fiducials | Spatial Fiducials | C.21.2 | M
Common Instance Reference | C.12.2 | M
SOP Common | C.12.1 | M

### Note

The Specimen Identification Module was previously included in this IOD but has been retired. See PS3.3-2008.

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