Portable and versatile gamma or x-ray imaging device for non-destructive testing of suspicious packages incorporating the transmission and backscatter imaging techniques

摘要

The device comprises a X-ray or gamma source (4), a matric detector (6) with a useful detection zone (8), a removable shielding and collimation accessory (5) providing the X-ray or gamma source to fit imaging backscatter, a removable image formation accessory (10) with a mechanical structure with a coded mask, and a system for synchronously controlling the X-ray or gamma source, the detector and the imaging accessory and for processing data for displaying an image in real time to allow radiography of an object and/or imaging backscatter, and/or to detect and locate a radioactive source in the object. The device comprises a X-ray or gamma source (4) that is adapted for radiography, a matric detector (6) that is sensitive to the X-rays or gamma source and largely pixelized and comprises a useful detection zone (8) that registers a square with a side of 20 cm and is composed of pixels for detecting small size of lower than 300 mu m, a removable shielding and collimation accessory (5) that provides the X-ray or gamma source to fit imaging backscatter, a removable image formation accessory (10) that is based on a coded aperture imaging technique and includes a motorized mechanical structure with a coded mask that is largely and finely pixelated and inscribed with a square with a side of 6 cm, where the coded mask is provided with pixels of less than 1000 mu m, and the structure is placed against the imaging sensor when the backscatter imaging or radioactive source is effected, and a system for synchronously controlling the x-ray or gamma source, the detector and the imaging accessory and for processing data for displaying an image in real time to allow radiography of an object and/or imaging backscatter, and/or to detect and locate a radioactive source present in the object. The source is a generator of X-rays whose power is superior to 100 W. The mechanical structure is equipped with a shielding intended to protect the detector with respect to parasitic radiations. The coded mask includes a pattern such MURA antisymmetric. The device further comprises a rotation device to rotate the coded mask at 0-90[deg] in a reversible manner. The detector includes a pixelized electronic detector or a radio luminescent screen with a memory. An independent claim is included for a method for non-destructive testing of an object.