Bomb detection using backscattered x-ray radiography

The primary method used to determine if an unattended package is dangerous is currently transmission radiography. This system has two main drawbacks. First, the film must be placed on one side of the package and an x-ray source on the other side of the package. An arrangement that cannot always be achieved due to the position of the package. The other drawback is that the package may detonate before the film is removed and all the information about the package lost.