B Dot Medical Inc.

National Institute of Radiological Sciences

Toshiba Energy Systems & Solutions Corporation

National Institutes for Quantum and Radiological Science and Technology

Kabushiki Kaisha Toshiba

Takuji Furukawa

Yousuke Hara

Kota Mizushima

Taku Inaniwa

Ryohei Tansho

Kouji Noda

Katsushi Hanawa

Eri Takeshita

Munemichi Matsumoto

Shinji Sato

Yasushi Iseki

Nobukazu Kakutani

Naoya Saotome

Yuichi Saraya

Koji Noda

Taiga Yamaya

Hideo Murayama

Shigeki Takayama

Takashi Yazawa

Tomofumi Orikasa

Kei Koyanagi

Yoshiharu Kanai

Kazunao Maeda

Shinichirou Mori

Shinichi Minohara

Nobuyuki Kanematsu

Taishi Masuda

Toshiyuki Shirai

Kosuke Sato

Yoshiaki Taki

Yuka Matsuzaki

Kohei Kotaki

A control method for an accelerator according to the present embodiment is a control method for an accelerator that supplies a current generating a magnetic field to a plurality of deflection electromagnets based on a current-value instruction signal. The method includes providing a flat region that makes a current value of the deflection electromagnet constant in a case of an acceleration cycle involving emission of the charged particles, not providing the flat region in the current-value instruction signal in a case of an acceleration cycle, smoothing time change of a current value in a transition of the current value to the flat region or a transition from the flat region, and determining a time required for the smoothing based on a predetermined energy for extracting the charged particles or a difference between energies before and after change to the predetermined extraction energy.

Control method for accelerator, control device for accelerator, and particle-beam radiation treatment system

A charged particle emission control technique where slow extraction of a charged particle beam from a synchrotron can be stably performed even in a state where beam adjustment has not been performed or completed. A charged particle emission control device includes a first receiver configured to receive a first detection signal obtained by detecting a current value of charged particles orbiting in a synchrotron; an arithmetic processor configured to time-differentiate the first detection signal and output a beam-intensity equivalent-value; and an emission controller configured to output a control signal for emitting a charged particle beam from the synchrotron to a beam transport system in such a manner that the beam intensity-equivalent value matches a target value.

Charged particle emission control device, method, and program

The invention provides a charged particle irradiation apparatus including: a collimator apparatus provided in an irradiation nozzle that emits a charged particle beam to an irradiation target; and a collimator control unit that controls the collimator apparatus. The collimator apparatus includes a collimator mechanism having one or more arm-shape collimators extending from a base part and a drive mechanism that moves the collimator mechanism on a plane perpendicular to a traveling direction of a charged particle beam. The arm-shape collimator includes one or more movable leaves that rotate independently of each other on the perpendicular plane. By moving the collimator mechanism and/or rotating the movable leaves so that the arm-shape collimators are arranged along a shape of an edge of an irradiation target on the perpendicular plane, the collimator control unit causes the arm-shape collimators to block a charged particle beam that would otherwise irradiate outside of the edge of the irradiation target.

Charged particle irradiation apparatus

The invention provides a patient shuttle system and an irradiation system for particle therapy. A patient shuttle system of one embodiment of the invention includes: a patient table () adapted to carry a patient; a patient table drive unit () that moves and/or rotates the patient table; and a transfer unit () having a base () on which the patient table drive unit is placed. In a home position state of the patient shuttle system (), the patient table and first and second arms of the patient table drive unit are configured to be folded in the height direction (Z-axis). A robot arm base connected to the second arm is fixed at a position off the center of the base in plan view, and thereby a helper space () where a helper may ride is secured on the base. The robot arm base is fixed in a recess () provided in the base.

Patient shuttle system and irradiation system for particle therapy

Provided is a charged particle irradiation apparatus that performs scanning with a charged particle beam and irradiates an irradiation target spot by spot. An embodiment of the present invention provides a charged particle irradiation apparatus () including: a first dose monitor () mounted in an irradiation nozzle (); an irradiation pattern converting device () that generates irradiation control data used for controlling the charged particle irradiation apparatus () from treatment plan data including information on a dose rate and a dose of a charged particle beam for each spot; and a dose correction factor storage unit () that stores data of a dose correction factor with respect to a dose rate of a charged particle beam. The irradiation pattern converting device () is configured to select one spot in the treatment plan data, for instance.

The present invention relates to a superconducting electromagnet apparatus having a group of superconducting electromagnets including a first superconducting electromagnet and a second superconducting electromagnet arranged adjacent to the first superconducting electromagnet. Effective magnetic field regions generated by the first and second superconducting electromagnets, respectively, are formed to satisfy predetermined relational equations.

Superconducting electromagnet apparatus and charged particle irradiation apparatus

The invention provides a charged particle irradiation apparatus including: a focusing magnet that deflects a charged particle beam to continuously change an irradiation angle of the beam to an isocenter; an irradiation nozzle that continuously moves along a shape on an exit side of an effective magnetic field region of the focusing magnet, wherein the beam exiting the focusing magnet is emitted to the isocenter through the irradiation nozzle; a power supply rail along the shape on the exit side of the region; and a collector shoe fixed to the irradiation nozzle and configured to slide along the rail to supply power from the rail to the irradiation nozzle. A surface of the collector shoe contacted with the rail has the same bend radius as or average bend radius of the rail, and/or the collector shoe slides along the rail in contact with a flat side surface of the rail.

A patient shuttle system, an irradiation system for particle therapy and an operation method thereof are provided. One embodiment of the present invention provides a patient shuttle system including a patient table on which a patient is placed, a drive device that causes the patient table to move parallel and/or rotate, and a drive control device that controls parallel movement and/or rotation of the patient table by the drive device, in accordance with a parallel movement amount and/or a rotation amount of the patient table that are received from a patient positioning system provided in a treatment room for particle therapy.

Patient shuttle system, irradiation system for particle therapy and operation method thereof

A beam irradiation target verification apparatus includes an X-ray switching emission process unit that causes a vertical X-ray emitting unit to emit at least two types of X-rays using an energy-level switching unit, a vertical X-ray detection unit that detects an X-ray emitted from the vertical X-ray emitting unit, a pre-therapy verification image generation process unit, a reference image acquisition unit that acquires a reference image obtained at a therapy planning stage, a comparison process unit. The pre-therapy verification image generation process unit to generate pre-therapy verification images based on detection information of at least two types of X-rays obtained by the vertical X-ray detection unit. The comparison process unit makes comparisons between the pre-therapy verification images and the reference image, and the result output unit outputs a comparison result obtained by the comparison process unit.

Beam irradiation target confirmation device

An embodiment of the invention is a focusing magnet including a coil pair arranged on both sides of a path of a charged particle beam. The coil pair generates an effective magnetic field region in which a magnetic field is oriented in a direction (z-axis) perpendicular to a traveling direction (x-axis) of a charged particle beam. In an xy-plane, an incident charged particle beam deflected at a deflection angle &#x3d5; with respect to the x-axis at a deflection point Q is deflected by the effective magnetic field region, and irradiates an isocenter at an irradiation angle &#x3b8; with respect to the x-axis; an arbitrary point Pon a boundary on an exit side of the effective magnetic field region is at an equal distance rfrom the isocenter; a point Pon a boundary on an incident side of the effective magnetic field region and the point Pare on a radius rand an arc of a central angle (&#x3b8;+&#x3d5;); and when a distance between the deflection point Q and the isocenter is L, a distance R between the deflection point Q and the point Psatisfies a relational equation (4).

Focusing magnet and charged particle irradiation apparatus

An embodiment of the invention is a focusing magnet including a coil pair arranged on both sides of a path of a charged particle beam. The coil pair generates an effective magnetic field region in which a magnetic field is oriented in a direction (z-axis) perpendicular to a traveling direction (x-axis) of a charged particle beam. In an xy-plane, an incident charged particle beam deflected at a deflection angle &#x3d5; with respect to the x-axis at a deflection point Q is deflected by the effective magnetic field region, and irradiates an isocenter at an irradiation angle &#x3b8; with respect to the x-axis; an arbitrary point P2 on a boundary on an exit side of the effective magnetic field region is at an equal distance rfrom the isocenter; a point P1 on a boundary on an incident side of the effective magnetic field region and the point P2 are on a radius rand an arc of a central angle (&#x3b8;+&#x3d5;); and when a distance between the deflection point Q and the isocenter is L, a distance R between the deflection point Q and the point P1 satisfies a relational equation (4).

According to some embodiments, an accelerator control device has a high-frequency power controller and a timing controller. The high-frequency power controller supplies high frequency power for accelerating a charged particle beam to an accelerator. The timing controller controls an operation timing of a blocker that blocks the charged particle beam emitted from the accelerator based on a current value of the charged particle beam circulating in the accelerator.

Accelerator control device, accelerator control method, and particle beam therapy device

A charged particle beam irradiation apparatus according to an embodiment includes: a first scanning electromagnet device configured to deflect a charged particle beam to a second direction that is substantially perpendicular to a first direction along which the charged particle beam enters, the first scanning electromagnet device having an aperture on an outlet side larger than that on an inlet side; and a second scanning electromagnet device configured to deflect the charged particle beam to a third direction that is substantially perpendicular to the first direction and the second direction, the second scanning electromagnet device having an aperture on an outlet side larger than that on an inlet side, the first scanning electromagnet device and the second scanning electromagnet device being disposed to be parallel with the first direction.

Charged particle beam irradiation apparatus

A planning apparatus () determines irradiation parameter data () for a charged particle irradiation system (), which radiates charged particles generated by an ion source () to a target () by accelerating the charged particles by means of a linear accelerator () and a synchrotron (). The planning apparatus is provided with: a planning program (), which determines the irradiation parameter data () with respect to one target () by combining charged particles of a plurality of kinds of ion species; and a CPU () for executing the planning program. Consequently, the irradiation planning apparatus capable of performing irradiation with desirable dose distribution with respect to the target, the irradiation planning program, an irradiation plan determining method, and the charged particle irradiation system are provided.

Growing community of inventors

Chiba, Japan

Takuji Furukawa