US 12,285,630 B2
Systems and methods for controlling electron beam in radiotherapy
Feichao Fu, Shanghai (CN); Peng Wang, Shanghai (CN); Shoubo He, Shanghai (CN); Peng Cheng, Shanghai (CN); and Cheng Ni, Shanghai (CN)
Assigned to SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD., Shanghai (CN)
Filed by SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD., Shanghai (CN)
Filed on Aug. 17, 2022, as Appl. No. 17/820,555.
Application 17/820,555 is a continuation of application No. PCT/CN2020/085312, filed on Apr. 17, 2020.
Prior Publication US 2022/0387823 A1, Dec. 8, 2022
Int. Cl. A61N 5/10 (2006.01); G21K 1/00 (2006.01)
CPC A61N 5/1043 (2013.01) [A61N 5/1048 (2013.01); A61N 5/1081 (2013.01); G21K 1/003 (2013.01); A61N 2005/1089 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A beam control device for radiotherapy, comprising:
an electron beam generator configured to emit an electron beam for radiotherapy toward a subject in a first direction; and
a first deflection device configured to generate a defocused electron beam by defocusing the electron beam in a second direction, the second direction being different from the first direction, wherein the first deflection device includes at least one of a first microwave cavity, a device configured to generate a laser field to defocus the electron beam, or a lens.