Patent ID: 8009799
Filing Date: 2011-08-30
Classification: G01V

Abstract:
1. A tray for holding an article while the article is being subjected to penetrating radiation by an apparatus, the apparatus having a screening area where items are subjected to penetrating radiation and a conveyor belt displacing items placed thereon through the screening area, the tray comprising: a) a surface on which the article can be placed while subjected to penetrating radiation; b) the surface having at least two areas, namely a first area and a second area, the first and second areas characterized by first and second signatures, respectively when exposed to penetrating radiation, wherein the first signature is different from the second signature; c) the second area corresponding to a reference material having a reference signature; d) wherein said tray is suitable to be placed on the conveyor belt of the apparatus while the article rests on the surface of the tray so that the conveyor belt may advance said tray through the screening area of the apparatus.