FFF-HiRes

This protocol is recommended for high resolution devices such as EPID images.

Photon Profile Parameters

FFF parameters only apply to photon beams:

• Field Edge Left

• Field Edge Right

• Field Centre

• Field Size

• Top position

• Area Symmetry

• Peak Slope Left

• Peak Slope Right

• Peak Slope Ratio

Flattened field

FFF beams use the concept of In Field Area which is primarily used for the Area Symmetry and Peak Slope calculations.