An embodiment of the invention is directed to a computed tomography device, comprising a tunnel to receive baggage, an x-ray source providing an x-ray beam that intersects the tunnel and has a beam angle of 120.degree., a gantry that oscillates relative to the tunnel through an oscillation angle that equals 270.degree., and a plurality of detectors. The plurality of detectors are mounted to the gantry and adapted to receive x-rays from the x-ray source. In addition, the plurality of detectors are arranged in a horseshoe-shaped configuration in which at least one first detector is located a furthest distance from the x-ray source and at least one second detector is disposed on each side of the at least one first detector and is disposed closer to the x-ray source than the at least one first detector.