Abstract: Provided is a particle beam treatment apparatus irradiating an irradiation target with a particle beam. The apparatus includes: an accelerator that generates the particle beam in an acceleration space; and an irradiation unit that virtually divides the irradiation target into a plurality of layers and irradiates each layer while performing scanning with the particle beam with a scanning electromagnet. The accelerator includes a particle generation unit generating particles that are to accelerate in the acceleration space, and the accelerator sets a parameter of the particle generation unit based on at least one of the layers of the irradiation target and adjusts an intensity of the particle beam based on the set parameter.

Abstract: A treatment planning system for performing treatment planning of a charged particle beam treatment includes a calculation unit that calculates a dose distribution and an irradiation time required for the irradiation in a case where an irradiation target body is irradiated with a charged particle beam, corresponding to a plurality of predetermined cut-off dose values, and an output unit that outputs each of the cut-off values, data based on the dose distribution corresponding to each of the cut-off dose values, and the irradiation time corresponding to each of the cut-off dose values, to a display unit. The calculation unit cuts off an irradiation location having a dose which is equal to or smaller than the cut-off dose value, from doses required in respective irradiation locations of the irradiation target body, and thereafter, sets a current value of the charged particle beam when the dose distribution is calculated.

Abstract: A charged particle beam treatment apparatus includes an irradiator that irradiates an irradiation target with a charged particle beam by a scanning method, in which the irradiator includes a scanning electromagnet that performs scanning with the charged particle beam, is rotatable around the irradiation target by a rotating gantry, and emits the charged particle beam with a base axis orthogonal to a center line of the rotating gantry and passing through the center line as a reference, and when the scanning electromagnet is not operated, the charged particle beam which is emitted from a tip portion of the irradiator is inclined in one direction with respect to the base axis.

Abstract: A charged particle beam treatment apparatus includes an irradiator that irradiates an irradiation target with a charged particle beam by a scanning method, in which the irradiator includes a scanning electromagnet that performs scanning with the charged particle beam, is rotatable around the irradiation target by a rotating gantry, and emits the charged particle beam with a base axis orthogonal to a center line of the rotating gantry and passing through the center line as a reference, and when the scanning electromagnet is not operated, the charged particle beam which is emitted from a tip portion of the irradiator is inclined in one direction with respect to the base axis.

Abstract: A treatment planning system for performing treatment planning of a charged particle beam treatment includes a calculation unit that calculates a dose distribution and an irradiation time required for the irradiation in a case where an irradiation target body is irradiated with a charged particle beam, corresponding to a plurality of predetermined cut-off dose values, and an output unit that outputs each of the cut-off values, data based on the dose distribution corresponding to each of the cut-off dose values, and the irradiation time corresponding to each of the cut-off dose values, to a display unit. The calculation unit cuts off an irradiation location having a dose which is equal to or smaller than the cut-off dose value, from doses required in respective irradiation locations of the irradiation target body, and thereafter, sets a current value of the charged particle beam when the dose distribution is calculated.

Abstract: A charged particle beam therapy apparatus includes an accelerator accelerating a charged particle and emitting a charged particle beam, an irradiation unit irradiating an irradiation subject with the charged particle beam, and a ridge filter provided in the irradiation unit and generating a spread out Bragg peak of the charged particle beam. The ridge filter includes multiple damping members reducing energy of the incident charged particle beam, in an intersecting direction intersecting an irradiating direction of the charged particle beam. The damping member has a cross-sectional area changing along the irradiating direction and has a side surface of when being seen in the intersecting direction, being bonded to a side surface of another damping member. A pass-through portion passing through the ridge filter in the irradiating direction is formed at a position different from a position of the damping member of when being seen in the irradiating direction.

Abstract: A charged particle beam treatment apparatus includes an accelerator that generates and emits a charged particle beam, an irradiation nozzle that irradiates an irradiation target body with the charged particle beam, and a transport line that connects the accelerator and the irradiation nozzle to each other so as to transport the charged particle beam. The irradiation nozzle has a scanning unit which can scan the irradiation target body with the charged particle beam within a predetermined maximum scanning range in a direction along the first axis and a direction along the second axis, and a multi-leaf collimator disposed on a downstream side from the scanning unit, and which regulates a shape of an irradiation field when the irradiation target body is irradiated with the charged particle beam. The multi-leaf collimator has a pair of leaf groups disposed to face each other across the reference axis.

Abstract: A charged particle beam treatment apparatus includes an accelerator that emits a charged particle beam by accelerating a charged particle, an irradiation unit that irradiates an irradiation target body with the charged particle beam, a beam transport line that connects the accelerator and the irradiation unit to each other, and that transports the charged particle beam from the accelerator to the irradiation unit, and a control unit that controls the irradiation unit in irradiating the irradiation target body with the charged particle beam. The irradiation unit includes a scanning unit that scans each layer with the charged particle beam. After one layer is scanned with the charged particle beam by using a first current value, the control unit controls the irradiation unit so as to scan and irradiate the one layer with the charged particle beam by using a second current value which is different from the first current value.

Abstract: A charged particle beam treatment apparatus includes an accelerator that emits a charged particle beam by accelerating a charged particle, an irradiation unit that irradiates an irradiation target body with the charged particle beam, a beam transport line that connects the accelerator and the irradiation unit to each other, and that transports the charged particle beam from the accelerator to the irradiation unit, and a control unit that controls the irradiation unit in irradiating the irradiation target body with the charged particle beam. The irradiation unit includes a scanning unit that scans each layer with the charged particle beam. After one layer is scanned with the charged particle beam by using a first current value, the control unit controls the irradiation unit so as to scan and irradiate the one layer with the charged particle beam by using a second current value which is different from the first current value.

Abstract: A charged particle beam treatment apparatus includes an accelerator that generates and emits a charged particle beam, an irradiation nozzle that irradiates an irradiation target body with the charged particle beam, and a transport line that connects the accelerator and the irradiation nozzle to each other so as to transport the charged particle beam. The irradiation nozzle has a scanning unit which can scan the irradiation target body with the charged particle beam within a predetermined maximum scanning range in a direction along the first axis and a direction along the second axis, and a multi-leaf collimator disposed on a downstream side from the scanning unit, and which regulates a shape of an irradiation field when the irradiation target body is irradiated with the charged particle beam. The multi-leaf collimator has a pair of leaf groups disposed to face each other across the reference axis.

Abstract: A charged particle beam therapy apparatus includes an accelerator accelerating a charged particle and emitting a charged particle beam, an irradiation unit irradiating an irradiation subject with the charged particle beam, and a ridge filter provided in the irradiation unit and generating a spread out Bragg peak of the charged particle beam. The ridge filter includes multiple damping members reducing energy of the incident charged particle beam, in an intersecting direction intersecting an irradiating direction of the charged particle beam. The damping member has a cross-sectional area changing along the irradiating direction and has a side surface of when being seen in the intersecting direction, being bonded to a side surface of another damping member. A pass-through portion passing through the ridge filter in the irradiating direction is formed at a position different from a position of the damping member of when being seen in the irradiating direction.