“…X-ray backscatter imaging (XBI) technology has attracted a lot of attention during the turn of the century and it has been applied for vehicle surveillance, IED detections and for detection of buried objects such as land mines. Unlike conventional transmission X-ray, which is more sensitive for detecting high atomic number material [1][2][3], BAXI relies on the Compton scattering of the X-ray with the core electrons [1,2,4,5], and is more sensitive to low atomic number materials like explosives [2,6]. Furthermore, BAXI is more attractive in operations as both the X-ray source and detector are mounted in the same housing; thereby, it can scan large objects [7].…”