Mitsubishi Electric Corporation

Dena Co., Ltd.

Hitachi, Ltd.

Toshihiro Otani

Hisashi Harada

Taizo Honda

Masahiro Ikeda

Kazushi Hanakawa

Yuehu Pu

Yukiko Yamada

Tadashi Katayose

Takaaki Iwata

Katsuhisa Yoshida

Kengo Sugahara

Yuichi Yamamoto

Hidenobu Sakamoto

Shuhei Odawara

Kazuhiro Yoshimi

Takeshi Hagino

Koichi Ikuta

Daisuke Urushihara

Shinichi Masuno

Fumihiko Kashima

Syuhei Odawara

Yuehu Fu

In particle beam irradiation equipment, a control unit causes a storage unit to store, as position information of reference positions, position information of electromagnets that is acquired at the time of their first alignment, by cameras, and then acquires displacement amounts, based on the position information of the reference positions stored in the storage unit and from position information of the electromagnets acquired at the time of their realignment, by the cameras.

Particle beam irradiation equipment

A particle beam transport section comprises a horizontal deflection electromagnet which deflects a particle beam to a direction which is parallel to an accelerator median plane of a circular accelerator, a first perpendicular electromagnet which deflects a particle beam whose travelling direction is deflected by the horizontal deflection electromagnet to a direction which is different from a direction which is parallel to the accelerator median and a second perpendicular electromagnet which deflects the particle beam whose travelling direction is deflected by the first perpendicular deflection to a direction which is parallel to the accelerator median plane, wherein the horizontal deflection electromagnet is provided on a floor which is different from a floor where a particle beam irradiation unit is provided.

Particle beam therapy system

A particle beam treatment system includes an accelerator system that accelerates a charged particle beam and a beam transport system that transports a high-energy beam emitted from the accelerator to an irradiation location, wherein the beam transport system is provided with at least one steering electromagnet and at least one beam position monitor corresponding to the at least one steering electromagnet, and wherein the at least one beam position monitor supplies an excitation current for correcting a beam position, which periodically varies, to the at least one steering electromagnet.

Particle beam treatment system and beam position correcting method thereof

In a particle beam therapy system which scans a particle beam and irradiates the particle beam to an irradiation position of an irradiation subject and has a dose monitoring device for measuring a dose of the particle beam and an ionization chamber smaller than the dose monitoring device, the ionization chamber measuring a dose of a particle beam passing through the dose monitoring device, the dose of the particle beam irradiated by the dose monitoring device is measured; the dose of the particle beam passing through the dose monitoring device is measured by the small ionization chamber; and a correction coefficient of the dose measured by the dose monitoring device corresponding to the irradiation position is found based on the dose of the particle beam measured by the small ionization chamber.

Sensitivity correction method for dose monitoring device and particle beam therapy system

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.

Particle beam irradiation apparatus having adjustable low-scattering filling chamber and particle beam therapy system

The particle beam irradiation apparatus comprises: a position monitor that detects a passing position of a charged particle beam; and an irradiation control apparatus that calculates a distance from a predetermined reference point to the position monitor, calculates a beam irradiation position on an irradiation subject, and controls irradiation of the beam; wherein the irradiation control apparatus includes a position calculation apparatus that calculates the beam irradiation position, based on a beam position detected by the position monitor, a scanning starting point distance information on a distance from a irradiation plane of the irradiation subject to a scanning starting point, of the beam, in a scanning electromagnet, and a position monitor distance information on a distance, from the irradiation plane to the position monitor, that is calculated based on the calculated distance.

Particle beam irradiation apparatus and particle beam therapy system utilizing a beam position monitor to provide feedback adjustments based on the beam position

A control unit is provided with, a retaining section that retains a plurality of operation patterns each being a pattern of operation to be periodically repeated by an accelerator, the operation patterns having respective operation conditions adjusted for different emission times of an particle beam, to cause a deflection electromagnet in the accelerator to have an intended magnetic field intensity even under a presence of a hysteresis; a reading section for a plurality of slices of an irradiation target in a depth direction, which reads an irradiation condition for each of the slices; a selection section that selects the operation pattern suitable for each of the slices, on the basis of the read irradiation condition; and a main control section that controls, for each of the slices, the accelerator on the basis of the selected operation pattern and an irradiation device on the basis of the irradiation condition.

Particle beam therapy device and particle beam therapy device operation method

A server device selects by lot one event from among a plurality of events including an encounter event with an enemy character present in a predetermined area in a network game, accepts from a user a command indicating action taken on the enemy character, when the encounter event is selected by lot, performs a process on the enemy character, based on the accepted command, and stores a status of the enemy character obtained after processed. In addition, the server device selects by lot an encounter event for re-encountering an enemy character encountered in past, with a predetermined probability, reads from a memory a status of the re-encountered enemy character obtained at a past encounter, and sets the status as an initial status of the re-encountered enemy character.

Video game with enhanced capture opportunities

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.

A septum magnet includes a yoke that can be separated at the approximately center portion thereof in the axis direction; a septum coil; a return coil; and a vacuum duct that is inserted between the septum coil and the return coil. The septum coil is formed in such a way as to be able to be separated into a first portion and a second portion in response to separation of the yoke; and in a space between the septum coil and the vacuum duct, there is provided an auxiliary coil, in two portions of which, corresponding to the first portion and the second portion of the septum coil, electric currents flow in opposite direction to each other in a circumferential direction.

Septum magnet and particle beam therapy system

A charged particle beam position monitor is provided with a plurality of position monitors and a beam data processing device that performs calculation processing of the state of a charged particle beam, based on a plurality of signals outputted from the position monitors. The beam data processing device includes a plurality of channel data conversion units that perform AD conversion processing of the plurality of signals outputted from the position monitors; a position size processing unit, for each of the position monitors, that calculates the beam position of the beam, based on voltage information obtained through the AD conversion processing; and an integrated control unit that controls the plurality of channel data conversion units in such a way that while the beam is irradiated onto an irradiation subject, AD conversion processing of the signals is performed at different timings for the respective position monitors.

Beam position monitor and particle beam therapy system

A particle beam therapy system that prevents dispersion of a charged particle beam, reduction of the energy thereof, and upsizing of the system and can accurately monitor the opening shape of a multileaf collimator so as to perform high-accuracy particle beam therapy. An image-capturing unit that takes an image of an outer end of a respective downstream side face of a leaf plate is provided for each row of leaves in such a way as to be situated at a position that is at an outer side of an irradiation field; and adjusted in such a way that a foot of a perpendicular line from a viewpoint, of the image capturing unit, to the downstream side face of a leaf plate, is situated at a position that is at an inner side of the position of the outer end when the leaf plate is maximally driven in the departing direction.

Light from a light source is made to be reflected by a light source mirror and to pass through a variable collimator, an irradiation field shape shaped by the variable collimator is projected on a photographing screen by the light passed through the variable collimator, a projection portion of the photographing screen is photographed by a photographic device, and an image photographed by the photographic device is analyzed by an image processor.

There is obtained a particle beam therapy system in which the beam size is reduced. There are provided an acceleratorthat accelerates a charged particle beam; an irradiation apparatus that has a beam scanning apparatusfor performing scanning with the charged particle beam and irradiates the charged particle beam onto an irradiation subject; and a beam transport apparatusthat has a duct for ensuring a vacuum region or gas region that continues from the acceleratorto a beam outlet windowdisposed at a more downstream position than the beam scanning apparatus, and that transports the charged particle beam exiting from the acceleratorto the irradiation apparatus.

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Tokyo, Japan

Toshihiro Otani