Fig. 1. Schematic of TS-SCT. (a) Scanning trace lines; (b) geometric model in xoy plane

Fig. 2. Motion trajectories of X-ray source in different CT structures. (a) Motion trajectory of single-source spiral CT; (b) expanded view of moving track of single X-ray source in TS-SCT

Fig. 3. Geometric model of cone-beam spiral CT in z-direction. (a) p=T; (b) p>T

Fig. 4. Structural diagram of TS-SCT scanning

Fig. 5. Structural diagram of TS-SCT system

Fig. 6. Luggage phantom

Fig. 7. Reconstructed results from simulation experiment. (a) 128^th layer original image of phantom in z-direction; 128^th layer reconstructed images in z-direction for r of (b) 1/4, (c) 1/2, (d) 3/4, and (e) 1; (f) 154^th layer original image of phantom in z-direction; 154^th layer reconstructed images in z-direction for r of (g) 1/4, (h) 1/2, (i) 3/4, and (j) 1

Fig. 8. Simulation experiment. (a) Experimental system; (b) photo of test sample

Fig. 9. 3D reconstructed pseudo-color images. (a) r=1/2; (b) r=5/8; (c) r=1

Fig. 10. Reconstructed section images. (a)--(c) 150^th layer images in z-direction; (d)--(f) 200^th layer images in z-direction