X-ray scanner & detector signal processing system

An x-ray device for scanning objects moving on a conveyor path, processing signals acquired by said scanning, and displaying said signals on a display means, comprising:

• means disposed on one side of said conveyor path for directing a fan-shaped x-ray beam at said objects perpendicular to the direction of conveyance of said objects;
• an array of a plurality of x-ray detectors disposed on an opposite of said conveyor path for detecting radiation passing through said objects and for generating a signal corresponding to the detected radiation;
• an image memory connected to a display, said image memory having a plurality of memory cells corresponding in number to said plurality of detectors for storing said signal from each detector therein;
• means for controlling entry of signals from said detectors into said image memory;
• divider means for forming a useful signal of reduced amplitude for each detector signal by dividing each detector signal by a reference signal for a radiation intensity of 100%;
• means for generating said reference signal connected to said divider means;
• means providing an input to said divider for measuring selected types of errors in said useful signal;
• and
• comparator means connected to the output of said divider, said comparator means being connected to said means for controlling entry of signals into said image memory for inhibiting transfer of a current signal upon the identification of an unacceptable error in the output from said divider and instead transferring the contents of a selected memory cell preceding the cell allocated for said current signal to said cell allocated for said current signal in place of said current signal.