论文信息 - Material recognition with dual energy Single-slice-Helical CT

Material recognition with dual energy Single-slice-Helical CT

CT baggage scanning system is effective to detect the explosive and drug. In order to balance the system cost, scanning time and recognition capability, Dual Energy Single-slice Helical CT (DE-SHCT) has been widely adopted. The projection data is quite insufficient and hard to reconstruct well for material recognition with ordinary methods. In this paper we propose the ART+3DTV reconstruction method for DE-SHCT systems, which combines Dual Energy analysis, algebraic reconstruction technology (ART) and 3 dimensions total variation minimization (3DTV). The new method is applied on phantom consisting of objects of different materials, and real objects in baggage data scanned by a real DE-SHCT as well. The reconstruction quality is effective for object material recognition. All the above work has been applied to practical baggage inspection products in the moment.

[1] N C Yang,et al. Effective atomic numbers for low-energy total photon interactions in human tissues. , 1987, Medical physics.

[2] C. Crawford,et al. Dual energy computed tomography for explosive detection , 2006 .

[3] E. Sidky,et al. Accurate image reconstruction from few-views and limited-angle data in divergent-beam CT , 2009, 0904.4495.

[4] Li Zhang,et al. X-ray spectrum estimation from transmission measurements using the expectation maximization method , 2007, 2007 IEEE Nuclear Science Symposium Conference Record.

[5] Wenyuan Bi,et al. Fast detection of 3D planes by a single slice detector helical CT , 2009, 2009 IEEE Nuclear Science Symposium Conference Record (NSS/MIC).