THREE-DIMENSIONAL X-RAY CT CALIBRATION AND VERIFICATION APPARATUS AND METHOD

摘要

An apparatus for calibrating an x-ray computed tomography device has a plurality of objects formed from a material that is visible to x-rays. The plurality of objects are configured to receive x-rays without changing shape, and have substantially the same shape. The objects each have an object attenuation value to x-rays and a center point such that they are symmetrically shaped relative to their respective center points. The apparatus also has 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. Like other physical objects, such as the objects, the base has a base attenuation value to x-rays, and that value is greater than the base attenuation value. The center points of the plurality of objects together form a three-dimensional volume.

主权项

1. An apparatus for calibrating an x-ray computed tomography device, the apparatus comprising:
first, second, and third spheres formed from a material that is visible to x-rays, the three spheres being configured to receive x-rays without changing shape, each of the three spheres having a sphere attenuation value to x-rays; a base at least in part supporting the three spheres so that each of the spheres contacts at least one of the other spheres, the base having a base attenuation value to x-rays, the sphere attenuation value being greater than the base attenuation value, each of the spheres being locked in place on the base in a manner that prevents sphere translational movement, the second sphere contacting the first and third spheres, the first sphere having a first center, the second sphere having a second center, the third sphere having a third center, the first and second centers forming a first line, the first and third centers forming a second line, the first and second lines diverging.