Pseudo-Three-Dimensional Navigation in Helical Scan Security Inspection

In order to solve the navigation problem in x-ray security inspection, a stereoscopic visualization method is proposed in this paper. By analyzing the geometric relations between x-ray generator, detector and baggage on conveyor belt, a data reorganization method is used to produce rotating views of scanned baggage, which could be used as three-dimensional navigation. For illustration, a single slice helical scan model was adopted to demonstrate the algorithm. Experiment results show that pseudo-three-dimensional navigation is helpful to determine illegal objects in baggage. Compared with two-dimensional digital radiology navigation, this method could provide more information about the scanned object. Compared with real three-dimensional navigation methods with volume render technology, this method has the merit of low computational cost.