Gantry as arm rotating in longitudinal plane for particle therapy

Abstract

The invention discloses a system (2, 2') for particle beam therapy, which system, when viewed along the flow direction of a particle beam (4), comprises: a) an adjustable frame (10, 10'), It is used to deliver the beam to the target volume, said gantry comprising: a1) a beam coupling section (6) for the incident particle beam (4), which is oriented substantially horizontal, thereby defining a horizontal plane; a2) a first beam bending section (8, 8') comprising a plurality of beam deflecting and / or focusing magnets (12, 14), wherein the first bending section (8, 8') bends the particle beam (4) at an adjustable angle into a vertical plane, or 90 degrees in said horizontal plane, but the first beam bending part (8, 8') has a The mechanical possibility of rotating the axis of the particle beam (4) with an adjustable angle; a3) the beam delivery part (16), which receives the particle beam (4) leaving the first beam bending part (8, 8 ') ) and directing the particle beam (4) to a second beam bending section (18); a4) a second beam bending section (18) comprising a plurality of beam deflecting magnets and / or beam focusing magnets; a5) a beam nozzle (20) comprising a window for the particle beam (4) to exit; and b) a patient couch / chair (22) capable of being in or parallel to the horizontal plane and optionally vertically adjustable, wherein c) the frame (10, 10') is supported by a tilt mechanism (24) that allows the frame (10, 10 ') Vertically inclined angle Φ 1 , Φ 1 ∈ [‑90°; +90°], wherein the frame (10, 10') comprises a pivot (7, 7') arranged in the region of the first beam bending portion (8, 8'), and d) a rotating mechanism (26), which is arranged so that the second beam bending part (18) and the beam nozzle (20) can rotate by the angle Φ 1 The orientation rotation angle Φ given by 2 , where Φ 2 ∈ [‑180°; +180°].

Description

technical field [0001] The invention relates to a rack for particles. Background technique [0002] A gantry is commonly used in proton therapy and ion therapy to direct the incident beam at an optimal angle to a target (usually a tumor) in a patient. A gantry is a beam delivery system (usually including magnets) mounted on a mechanical structure that is able to surround a patient positioned at a treatment position - usually lying but in some cases also seated on a dedicated treatment couch / Chair - swivel. Typically, the angle of rotation of the gantry is slightly greater than 360 degrees, but slightly greater than 180 degrees are also used in some gantry to save space and allow access to the treatment couch / chair at any time during treatment. An example of a typical rotatable gantry used for proton therapy is disclosed in European Patent Application 15194 795.9 and in International Patent Application WO 2013 / 149945 Al. [0003] For various gantry orientations, the rotat...

AI Technical Summary

Problems solved by technology

However, these racks in the form of C-arms require considerable space to allow rotation involving systems weighing 10 tons

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