A.46 Real World Value Mapping IOD
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## A.46 Real World Value Mapping IOD

The Real World Value Mapping Information Object Definition specifies a mapping of the stored pixel values of referenced images into some Real World value in defined units. This allows the capture of retrospectively determined mappings, e.g., for values that cannot be determined at the time of image acquisition and encoding.

### Note

A particular use case is mapping of PET pixel values to counts, concentration, or selective uptake values (SUVs) normalized by one of several factors.

### A.46.1 Real World Value Mapping IOD Entity-Relationship Model

Figure A.46-1. Real World Value Mapping Information Object Definition E-R Model

### A.46.2 Real World Value Mapping IOD Modules

Table A.46-1. Real World Value Mapping 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
Real World Value Mapping Series | C.25.1 | M
Equipment | General Equipment | C.7.5.1 | M
Real World Value Mapping | Real World Value Mapping | C.25.2 | 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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