1. A contraband detection system, comprising: a) a gantry rotating about an axis and having an opening therethrough; b) an inspection area within the opening; c) a radiation source mounted on the gantry, emitting a beam of radiation toward the inspection area, the beam having a divergence along the axis; and d) a detector array positioned on the gantry, the detector array having a width along the axis sufficient to intersect the beam across a divergence of at least ±3 degrees.