摘要:
In order to obtain a particle beam irradiation apparatus that enlarges the dose distribution of beam spots while suppressing a decrease of the maximum available range of a charged particle beam, the particle beam irradiation apparatus includes a particle beam acceleration means; particle beam transport means; scanning apparatus that includes first scanning means and second scanning means, and two-dimensionally scans the beam; and irradiation control means that controls the scanning apparatus so as to irradiate the beam onto a target region including a plurality of small regions. The irradiation control means controls the first scanning means so as to scan the beam over a small region serving as an irradiation subject among the plurality of the small regions, and controls the second scanning means so as to change the small region serving as the irradiation subject to be a different small region among the plurality of the small regions.
摘要:
In order to obtain a particle beam irradiation apparatus that enlarges the dose distribution of beam spots while suppressing a decrease of the maximum available range of a charged particle beam, the particle beam irradiation apparatus includes a particle beam acceleration means; particle beam transport means; scanning apparatus that includes first scanning means and second scanning means, and two-dimensionally scans the beam; and irradiation control means that controls the scanning apparatus so as to irradiate the beam onto a target region including a plurality of small regions. The irradiation control means controls the first scanning means so as to scan the beam over a small region serving as an irradiation subject among the plurality of the small regions, and controls the second scanning means so as to change the small region serving as the irradiation subject to be a different small region among the plurality of the small regions.
摘要:
There is obtained a particle beam therapy system in which the beam size is reduced. There are provided an accelerator 14 that accelerates a charged particle beam; an irradiation apparatus that has a beam scanning apparatus 5a, 5b for performing scanning with the charged particle beam and irradiates the charged particle beam onto an irradiation subject; and a beam transport apparatus 15 that has a duct for ensuring a vacuum region or gas region that continues from the accelerator 14 to a beam outlet window 7 disposed at a more downstream position than the beam scanning apparatus 5a, 5b, and that transports the charged particle beam exiting from the accelerator 14 to the irradiation apparatus.
摘要:
The objective of the present invention is to reduce the effect of the hysteresis of a scanning electromagnet so as to obtain a particle beam therapy system that realizes high-accuracy beam irradiation. There are included an irradiation management apparatus (32) that controls the scanning electromagnet (3), based on target irradiation position coordinates (Pi) of a charged particle beam (1b), and a position monitor (7) that measures measurement position coordinates (Ps) of the charged particle beam (1b). The irradiation management apparatus (32) has a command value creator (25) that outputs a control input (Io (Ir)) to the scanning electromagnet (3), based on the target irradiation position coordinates (Pi) and correction data (Ia) created on the basis of the measurement position coordinates (Ps), measured by the position monitor (7) in the preliminary irradiation in which the excitation pattern of the scanning electromagnet is the same as that of the main irradiation plan, and the target irradiation position coordinates (Pi).
摘要:
There is obtained a particle beam therapy system in which the beam size is reduced. There are provided an accelerator 14 that accelerates a charged particle beam; an irradiation apparatus that has a beam scanning apparatus 5a, 5b for performing scanning with the charged particle beam and irradiates the charged particle beam onto an irradiation subject ; and a beam transport apparatus 15 that has a duct for ensuring a vacuum region or gas region that continues from the accelerator 14 to a beam outlet window 7 disposed at a more downstream position than the beam scanning apparatus 5a, 5b, and that transports the charged particle beam exiting from the accelerator 14 to the irradiation apparatus.
摘要:
The objective of the present invention is to reduce the effect of the hysteresis of a scanning electromagnet so as to obtain a particle beam therapy system that realizes high-accuracy beam irradiation. There are included an irradiation management apparatus (32) that controls the scanning electromagnet (3), based on target irradiation position coordinates (Pi) of a charged particle beam (1b), and a position monitor (7) that measures measurement position coordinates (Ps) of the charged particle beam (1b). The irradiation management apparatus (32) has a command value creator (25) that outputs a control input (Io (Ir)) to the scanning electromagnet (3), based on the target irradiation position coordinates (Pi) and correction data (Ia) created on the basis of the measurement position coordinates (Ps), measured by the position monitor (7) in the preliminary irradiation in which the excitation pattern of the scanning electromagnet is the same as that of the main irradiation plan, and the target irradiation position coordinates (Pi).
摘要:
There is provided a particle-beam energy changing apparatus that is capable of changing energy of a particle beam quickly and silently, in which a first energy changing unit and a second energy changing unit for changing energy of a particle beam passing therethrough by varying thicknesses of their attenuators attenuating the particle beam energy are arranged so that the particle beam passes through the first energy changing unit and the second energy changing unit; and the maximum attenuation amount by the first energy changing unit is set smaller than the maximum attenuation amount by the second energy changing unit.
摘要:
There is provided a particle-beam energy changing apparatus that is capable of changing energy of a particle beam quickly and silently, in which a first energy changing unit and a second energy changing unit for changing energy of a particle beam passing therethrough by varying thicknesses of their attenuators attenuating the particle beam energy are arranged so that the particle beam passes through the first energy changing unit and the second energy changing unit; and the maximum attenuation amount by the first energy changing unit is set smaller than the maximum attenuation amount by the second energy changing unit.
摘要:
A particle beam irradiation apparatus according to the present invention is provided with a vacuum duct that forms a vacuum region through which the charged particle beam passes, a vacuum window through which the charged particle beam is launched from the vacuum region, a scanning electromagnet that scans the charged particle beam; a monitoring apparatus including a position monitor that detects the passing position of a charged particle beam and the beam size thereof, a low-scattering gas filling chamber including the monitoring apparatus, and an irradiation management apparatus that controls irradiation of the charged particle beam; the particle beam irradiation apparatus is characterized in that the low-scattering gas filling chamber is changeably disposed in such a manner that the beam-axis-direction positional relationship between the monitoring apparatus and the vacuum window is a desired one and in that the low-scattering gas filling chamber is filled with a low-scattering gas.
摘要:
A particle beam therapy system comprising a treatment table, a treatment table control unit and an irradiation control unit configured to output an instruction for controlling the treatment table control unit, an accelerator and a scanning electromagnet, wherein after the treatment table control unit controls the treatment table so as for a patient isocenter which is reference position of an affected area of a patient to move to a position of an irradiation isocenter which is set at a position which is closer to an irradiation nozzle than an equipment isocenter which is reference of positional relation of the irradiation nozzle and the treatment table, the irradiation control unit outputs an instruction for irradiating the patient with a particle beam.