US 11,894,161 B2
Systems and methods for energy modulated radiation therapy
Anuj K. Purwar, Fremont, CA (US); James E. Clayton, Saratoga, CA (US); Dragos E. Constantin, Los Altos, CA (US); Gard E. Meddaugh, Mountain View, CA (US); Matthew C. Schmidt, Henderson, NV (US); Mark E. Trail, Menlo Park, CA (US); and Flavio Poehlmann, Fremont, CA (US)
Assigned to VARIAN MEDICAL SYSTEMS, INC., Palo Alto, CA (US)
Filed by Varian Medical Systems, Inc., Palo Alto, CA (US)
Filed on Mar. 27, 2020, as Appl. No. 16/833,424.
Application 16/833,424 is a continuation of application No. 15/470,803, filed on Mar. 27, 2017, granted, now 10,622,114, issued on Apr. 14, 2020.
Prior Publication US 2020/0227184 A1, Jul. 16, 2020
Int. Cl. G21K 1/093 (2006.01); A61N 5/10 (2006.01); G21K 5/04 (2006.01)
CPC G21K 1/093 (2013.01) [A61N 5/1043 (2013.01); G21K 5/04 (2013.01); A61N 2005/1087 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A method performed by a medical device, the method comprising:
adjusting an energy level of a particle beam within an accelerator to a first value with an energy switch communicatively coupled to the accelerator;
providing the particle from the accelerator to a beam deflector, the beam deflector including a permanent magnet and an electromagnet;
providing a permanent magnetic field by the permanent magnet;
operating the electromagnet to provide a first electromagnetic field with a first electromagnetic field value based on the first value of the particle beam;
adjusting the energy level of the particle beam within the accelerator to a second value with the energy switch; and
operating the electromagnet to provide a second electromagnetic field with a second electromagnetic field value based on the second value of the energy level of the particle beam;
wherein the first electromagnetic field with the first electromagnetic field value and the permanent magnetic field forms a first total magnetic field with a first total magnetic field value, and wherein the second electromagnetic field with the second electromagnetic field value and the permanent magnetic field forms a second total magnetic field with a second total magnetic field value.