Abstract: Provided is an irradiation planning apparatus including: a three-dimensional CT value data acquisition unit (36); a prescription data input processing unit (32) which acquires prescription data; a stopping power ratio conversion unit (37) and a nuclear reaction effective density conversion unit (38) which respectively generate first conversion data (41) and second conversion data (42) on the basis of three-dimensional CT value data; and a calculation unit (33) which calculates a dose distribution on the basis of the prescription data, the first conversion data (41), and the second conversion data (42), wherein the stopping power ratio conversion unit (37) and the nuclear reaction effective density conversion unit (38) perform correction processing for correcting data obtained from the three-dimensional CT value data, using a physical quantity indicative of a likelihood of spalling particles of incident charged particle beam (3), and then determine the dose distribution.

Abstract: Provided is an irradiation planning apparatus including: a three-dimensional CT value data acquisition unit (36); a prescription data input processing unit (32) which acquires prescription data; a stopping power ratio conversion unit (37) and a nuclear reaction effective density conversion unit (38) which respectively generate first conversion data (41) and second conversion data (42) on the basis of three-dimensional CT value data; and a calculation unit (33) which calculates a dose distribution on the basis of the prescription data, the first conversion data (41), and the second conversion data (42), wherein the stopping power ratio conversion unit (37) and the nuclear reaction effective density conversion unit (38) perform correction processing for correcting data obtained from the three-dimensional CT value data, using a physical quantity indicative of a likelihood of spalling particles of incident charged particle beam (3), and then determine the dose distribution.

Abstract: A planning apparatus (70) determines irradiation parameter data (67) for a charged particle irradiation system (1), which radiates charged particles generated by an ion source (2) to a target (80) by accelerating the charged particles by means of a linear accelerator (4) and a synchrotron (5). The planning apparatus is provided with: a planning program (73), which determines the irradiation parameter data (67) with respect to one target (80) by combining charged particles of a plurality of kinds of ion species; and a CPU (71) 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.

Abstract: A planning apparatus (70) determines irradiation parameter data (67) for a charged particle irradiation system (1), which radiates charged particles generated by an ion source (2) to a target (80) by accelerating the charged particles by means of a linear accelerator (4) and a synchrotron (5). The planning apparatus is provided with: a planning program (73), which determines the irradiation parameter data (67) with respect to one target (80) by combining charged particles of a plurality of kinds of ion species; and a CPU (71) 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.

Abstract: A novel radiotherapy apparatus is disclosed, comprising: a bed; an X-ray source for CT; an X-ray detector for CT; a CT rotating mechanism for supporting the CT X-ray source and the CT X-ray detector rotatably around the bed; a radioactive ray source for therapy; a collimator; and a therapy rotating mechanism for supporting the radioactive ray source and the collimator rotatably around the bed independently of the CT rotating mechanism.

Abstract: An irradiation dose calculating unit can solve a problem of a conventional irradiation dose calculating unit in that since irradiation doses from portals are empirically determined, it is likely that optimum irradiation doses are not established for a target and a critical organ. A prescription data input section is used for a physician to input prescription data designating doses to a target and a critical organ. First and second object function calculating sections each calculate predefined indices, and obtain a first object function representing the level of satisfaction for the critical organ and a second object function representing the level of satisfaction for the target and critical organ. The irradiation doses from the portals are calculated based on these object functions such that the prescription data are satisfied.