The present invention provides a method for determining a geometry of a scanning
volumetric computed tomographic (CT) system having a rotation axis, a rotational plane, an
x-ray source and a detector. The method includes scanning a phantom having a series of
spatially separated discrete markers with the scanning volumetric computed tomographic
system, wherein the markers are configured on a supporting structure of the phantom so as
to permit separate identification of each marker in a collection of projection images. The …