Abstract: A pixelated X-ray conversion screen includes a metal aperture sheet having a pixel hole filled with a scintillator material, wherein an area of the pixel hole is equal to or less than about 0.25 mm2.

Abstract: A gun trigger safety device for double action revolvers and other guns which holds the trigger in an unfireable position is disclosed. The gun trigger safety device comprises a plug that is molded to conform to the space defined by the inner perimeter of the gun trigger guard behind the trigger. The trigger is held in an unfireable condition when the plug is properly inserted. The gun trigger safety device includes flexible, asymmetrical flanges formed on both sides thereof which partially extend around the trigger guard and the rear edge of the trigger to secure the safety device in position. The flange on the entering side of the gun trigger safety device will bend as it is pushed into the trigger guard housing behind the trigger. The leading edge of the entering flange is radiused to facilitate insertion of the device into its functional position behind the trigger. In one embodiment the asymmetrical flanges are configured so as to be released from the right side of the weapon by right handed persons.