Patent ID: 9711253
Date: 2017-07-18
CPC Classifications: A61B,A61N,G21K

Claim:
1. A radiotherapy system, comprising: an electron beam generator, for generating an electron beam, at an energy of at least 60 MeV, directed to a surface of a living body to propagate in said living body; at least two coils, for generating a multipole magnetic field within said living body; and a controller having a circuit configured for controlling said at least two coils to generate and to dynamically redirect the multipole magnetic field, by applying an alternating current to the at least two coils; the multipole magnetic field concentrates said electron beam while electrons of said beam propagate in said living body, and wherein the controller having the circuit is configured for controlling said electron beam generator to dynamically shift said electron beam; wherein said shifting of the electron beam with the electron beam generator and said redirecting of the magnetic field with the at least two coils occurs synchronously and results in the delivery of an energy-dose into said living body with an energy-dose peak at an internal target location which is at a depth of at least 7 cm in said living body; wherein said controller is configured to control said electron beam and said at least two coils such that said energy-dose has a symmetric profile with respect to each of an x, y and z axis.