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Coordinate system
Aditya P. Apte edited this page Aug 17, 2017
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CERR’s coordinate system is based on the RTOG specifications. The physical units are cm. The RTOG specification states that the +x is towards the right of the gantry when viewed from the couch. This results in the following for various patient positions:
- Head First Supine (HFS): patient’s right is displayed on the left side of the viewer.
- Head First Prone (HFP): patient’s right is displayed on the right side of the viewer.
- Feat First Supine (FFS): patient’s right is displayed on the right side of the viewer.
- Feat First Prone (FFP): patient’s right is displayed on the left side of the viewer.
The coordinate system is aligned with the image. The structure and dose distributions are mapped to the image coordinates.