The matRad coordinate system
matRad uses the LPS (Left, Posterior, Superior) coordinate system
where the x-axis points towards the left patient-side, the y-axis towards the posterior direction and the z-axis towards the superior direction (see image below).
The rotation of the gantry (Φ) and the couch (θ) are defined in the following way:
- Gantry: Clockwise rotation around the z-axis
- Couch: Counter-clockwise rotation around the y-axis
simple gantry rotation:
simple couch rotation:
simultaneous couch and gantry rotation:
