ABSTRACT
Intrafraction motion adaptation in radiation therapy divides broadly into two categories: temporal and spatial adaptation. Spatial adaptation (tracking) involves changing the position of the beam or the patient in response to motion. Temporal adaptation (gating) involves turning a stationary beam on and o to compensate target motion. Simply put, the treatment beam denes a line of sight. e radiation is only turned on (gated) when the target is in the line of sight.
