Patent ID: 8550711

Claim:
A treatment table system for a particle beam therapy system which employs 3D imaging diagnosis for particle beam therapy in which a lesion of a subject is irradiated with high energy charged particle beams emitted from an accelerator, the treatment table system comprising: a top board on which the subject is placed; a lesion positioner system which supports and moves the top board thereby to position the lesion to an isocenter of the particle beam therapy system; and a treatment table moving mechanism which moves a treatment table provided with the lesion positioner system and the top board between a diagnosis position in a diagnostic 3D imaging unit and a treatment position relative to the particle beam therapy system, wherein the lesion positioner system is configured with a plurality of hierarchically arranged members to move the top board based on a combination of any of movements in a longitudinal direction, a lateral direction, a vertical direction, a rotation direction about an axis along the longitudinal direction, and a rotation direction about an axis along the lateral direction, when the treatment table is in the diagnosis position in the diagnostic 3D imaging unit, the lesion positioner system sets an isocenter of the diagnostic 3D imaging unit as a virtual isocenter of the particle beam therapy system, and positions the lesion to the virtual isocenter, based on an image of the lesion obtained by the diagnostic 3D imaging unit, in consideration of particle beam therapy based on a position of a particle radiation port and a direction of particle radiation of the particle beam therapy system, the treatment table moving mechanism includes a plurality of members which are driven independently from one another in respective predetermined directions to perform rotational movement or translational movement, and the treatment table moving mechanism moves the top board and the lesion positioner system translationally such that a central portion of the top board approaches a rotational axis of the treatment table moving mechanism in order to reduce the radius of the rotation of the top board, rotates the top board and the lesion positioner system, and translationally moves the top board and the lesion positioner system to the treatment position relative to the particle beam therapy system, while maintaining states of the top board and the lesion positioner system at a time of positioning when the lesion is positioned to the virtual isocenter, thereby to position the lesion to the isocenter of the particle beam therapy system.