Patent ID: 7164747

Claim:
A CT scanner for scanning of an object, the scanner comprising: a tunnel; a conveyor for moving the object through the tunnel; a gantry rotatable around the tunnel; an x-ray source connected to the gantry and configured to provide an x-ray beam substantially perpendicular to the tunnel; a first plurality of detectors connected to the gantry and positioned a first distance from, and opposite, the x-ray source; a second plurality of detectors connected to the gantry and positioned a second distance from the x-ray source, wherein the second distance is less than the first distance; and a third plurality of detectors connected to the gantry and positioned substantially the second distance from the x-ray source; wherein the x-ray beam intersects substantially an entire cross-section of the tunnel substantially transverse to a length of the tunnel; and wherein the first, second, and third pluralities of detectors combined are configured and disposed to receive substantially all of the x-ray beam passing through the tunnel in the cross-section.