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Roller-supported, modular, isocentric gentry and method of assembly

  • US 5,039,057 A
  • Filed: 04/12/1990
  • Issued: 08/13/1991
  • Est. Priority Date: 04/07/1988
  • Status: Expired due to Term
First Claim
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1. A method of assembling an earthquake resistant gantry for supporting and rotating a radiation beam transport and delivery system so as to deliver a treatment beam to a predetermined target isocenter within a patient, the method comprising the steps of:

  • mounting an inner support structure including fixedly separated, parallel front and rear concentric circular rings for rotation on an axis or rotation;

    connecting a first truss module of an annular segmented truss to extend radially from the inner support structure;

    turning the inner support structure on the axis of rotation and connecting a second truss module to the first truss module and to extend radially from the inner support structure;

    repeating the turning and truss module connection steps until an annular segmented truss is completed which circumscribes the inner support structure and rotates wherewith on the axis of rotation; and

    connecting an outwardly inclined member between the rear ring and the truss whereby the rear ring will support an entry element of the beam transport and delivery system for rotation on the axis of rotation, the inclined support member and annular truss will support intermediate elements of the beam transport and delivery system and means carried by the front ring or a brace member between the front and rear rings will support an exit element of the beam transport and delivery system directed at the target isocenter on the axis of rotation to deliver the treatment beam to the target isocenter independent of the rotational position of the gantry.

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