Patent ID: 8053745

Claim:
A device for circumscribing a three-dimensional target site with a beam, comprising: a beam generation device; a device arranged to direct the beam along a path in a plane, wherein a beam path from the device rotates about a horizontal axis so that the beam describes a cone of fixed opening angle with an isocenter at the apex of the cone, and wherein the isocenter remains fixed relative to a target site; a holding apparatus adapted to secure a body having the target site contained therein, wherein the body is oriented longitudinally along a body axis extending at an angle between horizontal and vertical, such that the sum of the angle of the body axis above the horizontal and an angle between an axis of the cone and any line in the cone substantially equals a right angle, and wherein the apparatus rotates the body about a vertical axis passing approximately through the center of the target site, simultaneously with the rotation of the beam path.