Proton beam behavior in a parallel configured <scp>MRI</scp>‐proton therapy hybrid: Effects of time‐varying gradient magnetic fields

Abstract

This investigation reveals that time-varying gradient magnetic fields required for image generation can cause a small spread in the proton beams used in the study which are independent of the effects arising from the B₀ field. Further, studies where clinical beam kernels were convolved with this spread show that these magnetic fields are expected to have an insignificant impact on the beam's entrance dose.