公开(公告)号：US20230253175A1

公开(公告)日：2023-08-10

申请号：US18015554

申请日：2021-04-13

Applicant: Hitachi, Ltd.

Inventor： Kenta TAKAHASHI ,  Satoru OKURA ,  Yuki ITO ,  Kohei YAMADA

IPC: H01J37/04 ,  H01J37/147 ,  A61N5/10

CPC classification number: H01J37/045 ,  H01J37/1474 ,  A61N5/1067 ,  A61N5/1071 ,  H01J2237/24507 ,  H01J2237/0473 ,  A61N2005/1087

Abstract: In a particle beam irradiation system, upon receipt of a signal to stop irradiation of a charged particle beam, the signal outputted from a scanning controller, an accelerator and transport system controller stops emission of the charged particle beam from a charged particle beam generation unit to the irradiation unit, the scanning controller determines, according to an irradiation dose of the charged particle beam at one of a plurality of spots that has been irradiated with the charged particle beam until immediately before the accelerator and transport system controller stops the emission, the irradiation dose measured by the irradiation dose monitor from when the signal to stop the irradiation is outputted, whether or not to skip the irradiation of the charged particle beam at another one of the plurality of spots subsequent to the one of the plurality of spots, so as to control the accelerator and transport system controller.