Abstract: There are provided a leaf row in which a plurality of leaf plates are arranged in the thickness direction of the row in such a way that the respective one end faces of the leaf plates are trued up and a leaf plate drive mechanism that drives each of the plurality of leaf plates in such a way that the one end face approaches or departs from a beam axis. In each of the leaf plates, a facing side facing a leaf plate that is adjacent to that leaf plate in the thickness direction is formed of a plane including a first axis on the beam axis; the leaf plate drive mechanism drives the leaf plate along a circumferential orbit around the second axis, on the beam axis, that is perpendicular to the beam axis and the first axis.

Abstract: A scanning power source that outputs the excitation current for a scanning electromagnet and an irradiation control apparatus that controls the scanning power source; the irradiation control apparatus is provided with a scanning electromagnet command value learning generator that evaluates the result of a run-through, which is a series of irradiation operations through a command value for the excitation current outputted from the scanning power source, that updates the command value for the excitation current, when the result of the evaluation does not satisfy a predetermined condition, so as to perform the run-through, and that outputs to the scanning power source the command value for the excitation current such that its evaluation result has satisfied the predetermined condition.

Abstract: A scanning power source that outputs the excitation current for a scanning electromagnet and an irradiation control apparatus that controls the scanning power source; the irradiation control apparatus is provided with a scanning electromagnet command value learning generator that evaluates the result of a run-through, which is a series of irradiation operations through a command value for the excitation current outputted from the scanning power source, that updates the command value for the excitation current, when the result of the evaluation does not satisfy a predetermined condition, so as to perform the run-through, and that outputs to the scanning power source the command value for the excitation current such that its evaluation result has satisfied the predetermined condition.

Abstract: There are provided a leaf row in which a plurality of leaf plates are arranged in the thickness direction of the row in such a way that the respective one end faces of the leaf plates are trued up and a leaf plate drive mechanism that drives each of the plurality of leaf plates in such a way that the one end face approaches or departs from a beam axis. In each of the leaf plates, a facing side facing a leaf plate that is adjacent to that leaf plate in the thickness direction is formed of a plane including a first axis on the beam axis; the leaf plate drive mechanism drives the leaf plate along a circumferential orbit around the second axis, on the beam axis, that is perpendicular to the beam axis and the first axis.

Abstract: A scanning power source that outputs the excitation current for a scanning electromagnet and an irradiation control apparatus that controls the scanning power source; the irradiation control apparatus is provided with a scanning electromagnet command value learning generator that evaluates the result of a run-through, which is a series of irradiation operations through a command value for the excitation current outputted from the scanning power source, that updates the command value for the excitation current, when the result of the evaluation does not satisfy a predetermined condition, so as to perform the run-through, and that outputs to the scanning power source the command value for the excitation current such that its evaluation result has satisfied the predetermined condition.

Abstract: There are provided a leaf row in which a plurality of leaf plates are arranged in the thickness direction of the row in such a way that the respective one end faces of the leaf plates are trued up and a leaf plate drive mechanism that drives each of the plurality of leaf plates in such a way that the one end face approaches or departs from a beam axis. In each of the leaf plates, a facing side facing a leaf plate that is adjacent to that leaf plate in the thickness direction is formed of a plane including a first axis on the beam axis; the leaf plate drive mechanism drives the leaf plate along a circumferential orbit around the second axis, on the beam axis, that is perpendicular to the beam axis and the first axis.

Abstract: The objective is to obtain a respiratory induction apparatus and a particle beam therapy system in which respiration can appropriately be induced by accurately evaluating the respiration.

Abstract: 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.

Abstract: There are provided a leaf row (5C) in which a plurality of leaf plates (5L) are arranged in the thickness direction of the row (5C) in such a way that respective end faces (EL) of the leaf plates (5L) are trued up, and a leaf plate drive mechanism (5D) that drives each of the plurality of leaf plates (5L) in such a way that the end face (EL) approaches or departs from a beam axis (XB). In each of the leaf plates (5L), a facing side (PL) facing a leaf plate that is adjacent to that leaf plate in the thickness direction is formed of a plane (Psa) including a first axis (Asa) on the beam axis (XB); the leaf plate drive mechanism (5D) drives the leaf plate (5L) along a circumferential orbit (OL) around the second axis (Asb), on the beam axis (XB), that is perpendicular to the beam axis (XB) and the first axis (Asa).

Abstract: A patient platform for making the position and posture of a diseased site coincide with those established by a treatment plan. Translation units translate a top board in the X, Y and Z directions respectively, in a fixed coordinate system. Rotation units rotate the top board in the ?, ?, and ? directions respectively. A controller controls the translation units and rotation units, based on desired rotation center point and desired rotation angle. The controller has a rotation drive signal generation unit that generates a signal for moving the top board in a rotating manner from the reference state “a” of the translation units and the rotation units to a desired rotation angle; and a translation drive signal generation unit that generates a signal for translating the translation units so the amount of translation movement, of the desired rotation center point, caused by the rotation movement is a predetermined value.

Abstract: The objective of the present invention is to eliminate noise caused by driving a ridge filter and to achieve a uniform dose distribution without making a patient sense discomfort or anxiety. There are provided a ridge filter having a thickness distribution in which the energy that a charged particle beam loses differs depending on the position thereon through which the charged particle beam passes, a deflector that deflects the charged particle beam, and a controller that controls the deflector in such a way that the charged particle beam passes through the thickness distribution of the ridge filter.

Abstract: There are provided with a respiration induction apparatus that induces respiration, based on a desired respiration waveform; a switching device that switches the orbit of a particle beam; and an irradiation apparatus that controls irradiation, in synchronization with the desired respiration waveform. A controller, which performs synchronization control of the switching device and the respiration induction apparatuses in a plurality of treatment rooms, adjusts the periods and the phases of the desired respiration waveforms of the respiration induction apparatuses in the treatment rooms so that the irradiation times synchronized with the desired respiration waveforms in the treatment rooms do not overlap with one another, and controls the switching device so as to switch the orbits of the particle beam, in accordance with the respective irradiation times of the treatment rooms.

Abstract: 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.

Abstract: A scanning power source that outputs the excitation current for a scanning electromagnet and an irradiation control apparatus that controls the scanning power source; the irradiation control apparatus is provided with a scanning electromagnet command value learning generator that evaluates the result of a run-through, which is a series of irradiation operations through a command value for the excitation current outputted from the scanning power source, that updates the command value for the excitation current, when the result of the evaluation does not satisfy a predetermined condition, so as to perform the run-through, and that outputs to the scanning power source the command value for the excitation current such that its evaluation result has satisfied the predetermined condition.

Abstract: 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.

Abstract: The objective is to eliminate the effect of the hysteresis of a scanning electromagnet so that there is obtained a particle beam irradiation system that realizes high-accuracy beam irradiation. There are provided a magnetic-field sensor that measures the magnetic field of a scanning electromagnet and an irradiation control apparatus that controls the scanning electromagnet based on a measurement magnetic field measured by the magnetic-field sensor and target irradiation position coordinates of a charged particle beam. The irradiation control apparatus is provided with an inverse map means that calculates a target magnetic field, based on the target irradiation position coordinates of the charged particle beam; and a compensator that outputs a control input, to the scanning electromagnet, for controlling the magnetic-field error between the target magnetic field and the measurement magnetic field to be the same as or smaller than a predetermined threshold value.

Abstract: The objective is to eliminate the effect of the hysteresis of a scanning electromagnet so that, in the raster scanning or the hybrid scanning, there is obtained a particle beam irradiation apparatus that realizes high-accuracy beam irradiation.

Abstract: A particle beam therapy system is provided with high irradiation flexibility that can reduce the amount of irradiation onto normal tissue. There are provided (i) a scanning electromagnet that performs scanning and outputting in such a way that a supplied charged particle beam is formed in a three-dimensional irradiation shape based on a treatment plan and (ii) deflection electromagnets that switch the orbits for the charged particle beam in such a way that the charged particle beam with which scanning and outputting are performed by the scanning electromagnet reaches an isocenter through a single beam orbit selected from a plurality of beam orbits established between the isocenter and the scanning electromagnet. The distance between the scanning electromagnet and the isocenter is made long.

Abstract: When the IMRT technology for a radiation therapy system utilizing an X-ray or the like is applied as it is to a particle beam therapy system having a conventional wobbler system, there is posed the problem that it is required to utilize two or more boluses. The objective of the present invention is to solve the problem of excess irradiation in IMRT by a particle beam therapy system. More specifically, the problem of excess irradiation in IMRT by a particle beam therapy system is solved by raising the irradiation flexibility in the depth direction, without utilizing a bolus.

Abstract: A particle beam irradiation apparatus There is provided a data processing apparatus that displays on a display unit a measured irradiation position value and an irradiation position value error, which is the error of the measured irradiation position relevant value related to the irradiation position of charged particle beam with respect to a desired irradiation position value related to a desired irradiation position, so that the measured irradiation position relevant value and the irradiation position relevant value error correspond to each other.