Patent ID: 8764290
Filing Date: 2014-07-01
Classification: A61B,G01N,G01T

Abstract:
1. An apparatus for calibrating an x-ray computed tomography device, the apparatus comprising: a plurality of objects formed from a material that is visible to x-rays, the plurality of objects being configured to receive x-rays without changing shape, each of the plurality of objects having substantially the same shape, the objects each having an object attenuation value to x-rays, each of the plurality of objects having a center point and being symmetrically shaped relative to its center point; a base at least in part fixedly supporting the plurality of objects so that each of the plurality of objects contacts at least one of the other objects, the base having a base attenuation value to x-rays; and a securing member applying a force to the plurality of objects, the securing member cooperating with the base to fixedly secure the plurality of objects to be substantially unmovable, the object attenuation value being greater than the base attenuation value, each of the plurality of objects being kinematically locked in place on the base.