Hitachi, Ltd.

Hitachi High-Tech Corporation

Nec Corporation

Yahoo Japan Corporation

Takuya Nomura

Hideaki Nishiuchi

Masahiro Yoshida

Kunio Moriyama

Satoshi Totake

Futaro Ebina

Koji Tobinaga

Masumi Umezawa

Kazuyoshi Saito

Takashi Toyoda

Taisuke Takayanagi

Shinichiro Fujitaka

Yuki Ito

Rintarou Fujimoto

Tomohisa Imagawa

Takuya Hisamoto

Takuto Miyoshi

Moemi Takeda

Kosuke Ogasawara

Seiji Soeda

Ryotaro Takeda

Kenichi Kijima

Seiji Yoshiura

An information processing apparatus includes at least one memory storing instructions, and at least one processor. The at least one processor is configured to execute instructions to receive request information including qualification information regarding an operation qualification for operating a mobile body and plan information regarding an operation plan for operating the mobile body, acquire attribute information of the qualification information, determine whether or not to accept a request associated with the request information based on the attribute information, and output a result of the determination regarding the request as a response to the request.

Information processing apparatus, information processing method, information processing system, and computer readable medium

A dose monitor measures a dose of a beam. The position monitor measures the beam size of the beam. The irradiation control apparatus calculates the measurement characteristic of the dose monitor based on the dose and the beam size of the beam, and controls the irradiation of the patient with the beam based on the measurement characteristic and the dose.

Particle therapy system, irradiation control apparatus, and irradiation control method

There is provided a circular accelerator that accelerates a beam of charged particles circulating in a magnetic field such that a closed orbit for each energy of the beam is eccentric. The circular accelerator includes a beam extraction port for extracting beams of different energies from the closed orbit, a first bending magnet and a second bending magnet that bend the beam extracted from the beam extraction port, and a control unit that controls magnetic field strengths of the first bending magnet and the second bending magnet in accordance with the energy of the extracted beam. When the energy of the extracted beam is a designed maximum energy of the circular accelerator, the control unit excites both the first bending magnet and the second bending magnet to bend the beam.

Circular accelerator and particle therapy system

A scanning magnet that deflects a charged particle beam has a winding U provided with grooves SLand SLprovided at facing positions. A passing direction of a conductive wire forming the winding U passes through the groove SLin a &#x3b3;-axis positive direction, and passes through the groove SLin a &#x3b3;-axis negative direction. The winding U has a loop path SL-SLin which the groove SLis directed to the &#x3b3;-axis positive direction, and the groove SLis directed to the &#x3b3;-axis negative direction. When a current flows in the &#x3b3;-axis positive direction in a winding section U+ disposed in the groove SL, a current flows in the &#x3b3;-axis negative direction in a winding section U&#x2212; disposed in the groove SL. A yoke, the winding U, a winding V, and a winding W have a 120&#xb0; rotationally symmetric structure with respect to a central axis of the yoke.

Scanning magnet and particle therapy system

There is provided a treatment planning system and a particle therapy system. In the related art, it is unable to determine optimum beam intensity in irradiation for which discrete spot irradiation and continuous beam irradiation coexist. There is provided a treatment planning system that includes a spot determination unit that divides an irradiation region to be irradiated with a charged particle beam into a plurality of layers in an advancing direction of the charged particle beam and disposes a plurality of irradiation spots, which becomes irradiation points of the charged particle beam, in the layers and a beam intensity determination unit that determines beam intensity for each of the layers by evaluating the irradiation time by changing the beam intensity in a range of a condition of change in dose distribution which is set in advance.

Treatment planning system and particle therapy system

An information processing apparatus discloses herein includes an acquiring unit and an estimating unit. The acquiring unit acquires a plurality of pieces of identity information including a keyword based on an operation performed by a user. The estimating unit estimates an age group of the user based on the plurality of pieces of identity information acquired by the acquiring unit.

Information processing apparatus, information processing method, and non-transitory computer readable storage medium

A particle beam therapy system is disclosed which includes: a synchrotron accelerating a charged particle beam injected from a pre-accelerator up to a predetermined energy level before applying a high-frequency voltage to an extraction device to extract the charged particle beam caused to exceed a stability limit; a beam transportation system transporting the charged particle beam extracted from the synchrotron up to a treatment room, and an irradiation device irradiating a patient in the treatment room with the charged particle beam in conformity to the patient's tumor shape. The synchrotron has functionality to accelerate or decelerate the charged particle beam successively to extract the charged particle beam at a plurality of energy levels during an extraction phase of the synchrotron, the beam transportation system further having functionality to block off an unnecessary charged particle beam extracted from the synchrotron during acceleration or deceleration.

Particle beam therapy system

When controlling the ejection of a charged particle beam from a synchrotron, a radiofrequency voltage is applied, which serves as the radio-frequency voltage to be applied to an ejection radio-frequency electrode equipping the synchrotron, and which is constituted by a first radio-frequency voltage for increasing an oscillation amplitude in such a way as to exceed a stable limit in order to eject to the exterior of the synchrotron a beam that circles inside the synchrotron, and a second radio-frequency voltage for preferentially ejecting a charged particle beam that circles in the vicinity of the stable limit, with the amplitude value of the second radiofrequency voltage being controlled in such a way that the amplitude value is 0 prior to the beam ejection start, the amplitude value increases gradually from the beam ejection start, and, once a predetermined amplitude value has been reached, this value is maintained.

Charged particle beam radiation system, synchrotron, and beam ejection method therefor

A particle beam irradiation system having a multi-energy extraction control operation that controls the extraction beam energy in a synchrotron within a short time, such that when the ion beam irradiation is halted, an operating cycle is updated within a short time and a dose rate is improved. To this end, operating control data for each of the devices constituting the synchrotron is constructed by multi-energy extraction control pattern data for controlling extraction of beams of a plurality of energy levels at one operating cycle, and a plurality of sets of deceleration control data that correspond to the extraction control of the beam of the plurality of energy levels. The devices are controlled by using the operating control data.

Particle beam irradiation system and operating method

The operation control data about the component device constituting the synchrotronare structured to include an initial acceleration control data item, a plural extraction control data items, a plural energy change control data items that connect the plural extraction control data items. The plural extraction control data items include extraction condition setting data items and extraction condition cancellation data items corresponding to the plural extraction control data items. As a result, a particle beam irradiation system capable of controlling changes in beam energy, updating operation cycle, and extracting beam in a short time can be provided.

A control data about the devices constituting the synchrotron are formed by an initial acceleration control data item, a plural extraction control data items, a plural energy change control data items connecting the plural extraction control data items, and a plural deceleration control data items corresponding to the plural extraction control data items. An affected part position detection unit and an extraction permission determination unit are provided to determine whether the position of a marker shown in transparent image information is included within a beam irradiation permission range. If the marker position is found included, the extraction permission determination unit outputs to an interlock system an extraction permission determination signal permitting beam extraction.

Growing community of inventors

Tokyo, Japan

Takuya Nomura