초록 ▼

A collimator apparatus is disclosed for directing a high energy electron beam from an accelerator through an exit aperture and through a spaced and non-connected collimator tube in juxtaposition with a target area in a patient. The collimator tube is adjustably positioned and positionally maintained

A collimator apparatus is disclosed for directing a high energy electron beam from an accelerator through an exit aperture and through a spaced and non-connected collimator tube in juxtaposition with a target area in a patient. The collimator tube is adjustably positioned and positionally maintained by jig structure supported independently of the accelerator structure. A rod type alignment device is releasably positionable in the collimator tube to define alignment of that tube by a novel method using traditional isocentric motions of a patient couch and accelerator gantry. Collimator tubes of varying diameters and exit configurations may be selectively utilized to accurately conform an electron beam to a particular target area and provide uniform irradiation over that target area.

대표청구항 ▼

A separated collimator and alignment apparatus for use with linear electron accelerators having a beam output structure supported by a gantry and an associated patient couch movable in three-dimensional space relative to said gantry, comprising, in combination: an aperture structure defining an orif

A separated collimator and alignment apparatus for use with linear electron accelerators having a beam output structure supported by a gantry and an associated patient couch movable in three-dimensional space relative to said gantry, comprising, in combination: an aperture structure defining an orifice for passage of an electron beam therethrough, said aperture structure being releasably carried by an accelerator collimator tube and said orifice being similarly configured to and not larger than an aperture defined in a patient collimator tube; the patient collimator tube defining a first medial channel for passage of a coherent electron beam and defining a planar input end facing the aperture structure and an exit end distal therefrom; an annular positioning ring defining a second medial channel to fit about the periphery of the patient collimator tube, said positioning ring defining first means for attachment to a positioning jig mechanism and second means for releasable and adjustable positional maintenance upon the patient collimator tube; the positioning jig mechanism having at least two rigid rods joined for articulating motion with said first means at a first end to fastenably interconnect with the positioning ring and said second means at a second end for support on a structure external of an electron accelerator to be serviced; and an elongate alignment rod carried by a base support disk releasably positionable in a first inner accelerator facing end of the patient collimator tube to aid axial alignment of the alignment rod with the patient collimator tube.