Gamma
radiation imaging
system for non-destructive inspection of the luggage contains a DR sub-
system, which obtains the projected image of the luggage by translationally scanning, and a CT sub-
system, which obtains the tornograph image of the luggage by rotating scanning. Said DR sub-system includes a fixed gantry, a
conveyor system, a
radiation source mounted on the fixed gantry, front and back collimators, and the array
detector. Said CT sub-system includes a rotating gantry, a
conveyor system, a
radiation source mounted on the rotating gantry, front and back collimators, and the array
detector, wherein, the radiation source in said CT sub-system is 192Ir or 75Se radioactive
isotope gamma source with
high specific activity. Said gamma source is enclosed in a shield chamber with a projecting opening. The shield chamber is mounted on said rotating gantry. Said array
detector is adapted for detecting
gamma ray of 192Ir or 75Se radioactive
isotope; The radiation source in said DR sub-system is 192Ir or 75Se radioactive
isotope gamma source with
high specific activity, said gamma source is enclosed in a shield chamber with a projecting opening. The shield chamber is mounted on said fixed gantry. Said array detector is adapted for detecting
gamma ray of 192Ir or 75Se radioactive isotope.