X-RAY INSPECTION WITH CONTEMPORANEOUS AND PROXIMAL TRANSMISSION AND BACKSCATTER IMAGING

摘要

AN X-RAY IMAGING INSPECTION SYSTEM FOR BAGS AND PACKAGES. TRANSMISSION IMAGING IS PERFORMED USING A FAN BEAM AND A SEGMENTED DETECTOR, WHILE SCATTER IMAGING IS PERFORMED WITH A SCANNED PENCIL BEAM, WITH BOTH BEAMS ACTIVE SIMULTANEOUSLY. CROSS-TALK BETWEEN THE BEAMS IS MITIGATED BY A COMBINATION OF SHIELDING, SCATTER DETECTOR DESIGN, POSITIONING AND ORIENTATION, AND IMAGE PROCESSING IMAGE PROCESSING SUBTRACTS THE MEASURED RADIATION SCATTERED FROM THE TRANSMISSION BEAM INTO THE SCATTER DETECTORS, REDUCING CROSS-TALK.