US 12,226,658 B2
Radiation therapy system and method of operating radiation therapy apparatus
Shuji Kaneko, Tokyo (JP); and Kunio Takahashi, Tokyo (JP)
Assigned to HITACHI HIGH-TECH CORPORATION, Tokyo (JP)
Filed by Hitachi High-Tech Corporation, Tokyo (JP)
Filed on May 22, 2023, as Appl. No. 18/200,189.
Application 18/200,189 is a continuation of application No. 17/195,685, filed on Mar. 9, 2021, granted, now 11,697,031.
Claims priority of application No. 2020-064381 (JP), filed on Mar. 31, 2020.
Prior Publication US 2023/0302299 A1, Sep. 28, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61N 5/10 (2006.01)
CPC A61N 5/1048 (2013.01) [A61N 5/103 (2013.01); A61N 5/1045 (2013.01); A61N 5/1081 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A radiation therapy system, comprising:
a radiation source;
a rotation mechanism that supports the radiation source and rotates the radiation source around an isocenter;
a couch that places a therapy target site of a patient at the isocenter;
a head swing mechanism that is disposed between the radiation source and the rotation mechanism and that swings an irradiation axis of a radiation emitted from the radiation source by swinging the radiation source; and
a controller that controls the radiation source, the rotation mechanism, and the head swing mechanism,
wherein in an irradiation range expansion mode the controller holds the head swing mechanism in a state where the irradiation axis of the radiation of the radiation source is shifted from the isocenter in a predetermined direction by a predetermined amount by the head swing mechanism and rotates the radiation source by the rotation mechanism while emitting the radiation from the radiation source while maintaining the state of the head swing mechanism.