X-ray multi-energy radiography with scintillator-photodiode detectors
  For reconstruction of the spatial structure of many-component objects, it is proposed to use multi-radiography with detection of X-ray by combined detector arrays using detectors of ``scintillator-photodiode'' type. A theoretical model has been developed of multi-energy radiography for thickness measurements of multi-layered systems and systems with defects. Experimental studies of the sensitivity, output signal of various inspection systems based on scintillators $ZnSe(Te)$ and $CsI(Tl)$, and object image reconstruction (with organics and non-ogranics materials singled out) have been carried out. 
S.V. Naydenov, V.D. Ryzhikov, B.V. Grinyov, E.K. Lisetskaya, A.D.   Opolonin, D.N. Kozin