4Shi Xinhua. Improving Classification in X - ray Luggage Inspection [ D ]. Virginia Polytechnic Institute and State University, Doctor of Philosophy in Electrical Engineering, 2000- 119.
5R E Alvarez, A Macovski. Energy selective reconstructions in x- ray computeried tomography[ J]. Physics in medicine and biology, 1976,21 (5) :733 - 744.
6A Macovski, R E Alvarez. Energy dependent reconstruction in X - ray computer - ized tomography [ J ]. Computers in biology and medicine, 1976,6 (4) :325 - 336.
7T Wang, J Evans. Stereoscopic dual energy X - ray imaging for target materials identification [ J ]. IEE Proceedings - Vision, Im- age and Signal Processing, 2003,150(2) : 122 -130.
8Keh - Shih Chuang, H K Huang. Comparison of four dual energy image decomposition methods [ J ]. Phys. Med, 1988,33 (4) :455- 466.
9Eric L Gingold, Bruce Hasegawa. Systematic bias in basis material decomposition applied to quantitative dual energy x - ray imaging [J]. ned. Phys, 1991,19(1):25-33.
10L Lehmann, R Alvarez. Generalized image combinations in dual KVP digital radiography[J]. Med. Phys, 1981,8(5) : 659 -667.
