Various embodiments relate to a method of performing microbeam radiation therapy on a subject, including: producing a high-energy radiation beam in a first direction producing planar microbeams using the high-energy radiation beam in the first direction, wherein the microbeams have a width, wherein the planar microbeams produce scattered electrons and applying a magnetic field in a direction lying in a plane substantially parallel to the planar microbeams, wherein the strength of the magnetic field corresponds to the width of the microbeam.
