A model-based 3D multi-slice helical CT reconstruction algorithm for transportation security application

Multi-slice helical CT is widely used for baggage inspection in transportation security due to its fast acquisition speed and large scan coverage. In addition, recent studies indicate that model-based reconstruction has the potential to improve image quality and reduce artifacts relative to traditional filtered backprojection (FBP) method. In this paper, we present the results of a 3D model-based reconstruction algorithm on a multislice helical scan of actual baggage with high and low density objects, acquired on a medical CT system. We compared our reconstruction results to conventional FBP reconstructions and illustrated the potential value of our algorithm in terms of image quality and artifact reduction.