The impact of a 1.5 T MRI linac fringe field on neighbouring linear accelerators

The MRI linac magnetic fringe field can influence the beam steering of the accelerators in adjacent bunkers. The steering of two accelerators that were situated the closest to the MRI linac needed to be adjusted in order to bring beam parameters within tolerances. Adjusting the steering completely compensated the influence of the magnetic fringe field of the MRI linac.