1. Extraction of energy-dependent information in radiography[D];Alvarez,1976
2. Review of X-ray Safety Inspection Techniques[J];Wang;CT Theory and Applications,2004
3. X-ray spectrum estimation from transmission measurements using the expectation maximization method[J];Zhang,2007
4. Evaluation of a prototype dual-energy computed tomographic apparatus. I. Phantom studies
5. CT Theory and Algorithm[M];Zhuang,1992