Patent ID: 7844032
Filing Date: 2010-11-30
Classification: G21K,H01J

Abstract:
1. A collimator comprising: a first plate having an aperture therein, the aperture configured to allow passage of a beam of x-rays through said aperture from a source of a multi-spot source therethrough and obstruct off-focal x-rays; and a second plate parallelly positioned offset with respect to the first plate and configured to receive the beam of x-rays passing through the aperture in the first plate, the second plate having an aperture therein configured to non-concentrically overlap the aperture in the first plate, and to allow passage of a second portion of the beam of x-rays from the aperture of the second plate therethrough and to obstruct off-focal x-rays; wherein a portion of the aperture in the first plate and a portion of the aperture in the second plate are aligned to form a composite aperture passage smaller than a width of each said aperture, the composite aperture passage configured to allow passage of the beam of x-rays that are substantially parallel to the composite aperture passage to pass through each aperture of the first and second plates.