G.R.C.Kaladhara Sarma, P.Uday Kumar. 2013. “ASTUDY REPORT ON X-RAY SENSOR AMPLIFIER PCB FOR X-RAY BAGGAGE INSPECTION SYSTEM (XBIS)”. International Journal of Engineering and Computer Science 2 (06). india. http://ijecs.in/index.php/ijecs/article/view/1342.