The invention relates to the technical field of
nuclear radiation imaging, in particular to a
radiation array
detector, a back scattering imaging
system and a back scattering imaging method. The
radiation array
detector comprises an X-
ray photon absorption structure which comprises high-strip-shaped scintillators and low-strip-shaped scintillators which are alternately arranged, the high-strip-shaped scintillators are used for detecting back scattering X-
ray photons incident at all angles, the low-strip-shaped scintillators are used for accurately determining the incident direction of the X-
ray photons through the collimation effect, and the high-strip-shaped scintillators and the low-strip-shaped scintillators are used for detecting the incident direction of the back scattering X-ray photons; after X-rays enter the
photon absorption structure, the high-strip-shaped scintillators and / or the low-strip-shaped scintillators receiving X-ray photons generate
scintillation photons. The
silicon photomultiplier array is connected with the high strip-shaped
scintillator and the low strip-shaped
scintillator through a
light guide and is used for converting
scintillation photons into photoelectric signals; and the position and
energy information coding circuit is used for carrying out position and
energy information coding on the photoelectric signals generated by the
silicon photomultiplier array. According to the invention, the detection efficiency and the direction identification capability of the back scattering X-ray can be effectively improved.