Patent application number | Description | Published |
20110204262 | PARTICLE BEAM THERAPY SYSTEM - 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. | 08-25-2011 |
20110218429 | PARTICLE BEAM THERAPY SYSTEM - There is obtained a particle beam therapy system in which the beam size is reduced. There are provided an accelerator | 09-08-2011 |
20120215049 | PARTICLE BEAM THERAPY SYSTEM - The objective is to obtain a particle beam therapy system that prevents dispersion of a charged particle beam, reduction of the energy thereof, and upsizing of the system and that 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 the base of a perpendicular from a viewpoint to the downstream side face, 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. | 08-23-2012 |
20120229143 | SENSITIVITY CORRECTION METHOD FOR DOSE MONITORING DEVICE AND PARTICLE BEAM THERAPY SYSTEM - 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. | 09-13-2012 |
20130207001 | SEPTUM MAGNET AND PARTICLE BEAM THERAPY SYSTEM - 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. | 08-15-2013 |
20140323793 | PARTICLE BEAM THERAPY DEVICE AND PARTICLE BEAM THERAPY DEVICE OPERATION METHOD - 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. | 10-30-2014 |
20140357339 | SERVER DEVICE, METHOD, AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM STORING GAME PROGRAM - 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. | 12-04-2014 |
20140374624 | SENSITIVITY CORRECTION METHOD FOR DOSE MONITORING DEVICE AND PARTICLE BEAM THERAPY SYSTEM - 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. | 12-25-2014 |