Fig. 1. Diagram of engineering model representation of the NeXT system^[16]

Fig. 2. Grayscale cross-sectional slices showing contrast differences between neutron imaging (a) and X-ray imaging (b) (Voids marked with the arrow in the X-ray can be difficult to distinguish in the neutron image suggesting that the void is partially water filled)^[16]

Fig. 3. The reconstructed tomograms from neutron and X-ray CT along with examples of sections extracted following virtual unrolling of the reconstructions^[3]

Fig. 4. Schematic diagram of a device for material identification using fast neutrons and continuous energy spectrum X-rays

Fig. 5. Fusion results of neutron and X-ray images^[25] (a) Wavelet transform method, (b) WBCT local adaptive method

Fig. 6. Schematic diagram of the overall outline framework structure of the radiation source

Fig. 7. Structural diagram of bispectral imaging camera for neutron radiation and X-ray radiation^[29] 1‒Flight guide, 2‒Composite imaging module (21‒Pinhole plate, 22‒Penumbral pore), 3‒The first optical image sensor, 4‒Second optical image sensor, 5‒First image lens, 6‒Second imaging lens, 7‒Optical element, 8‒X-ray scintillator, 9‒Neutron scintillator, 11‒Main part, 12‒The first branch, 13‒The second branch, 100‒Radiation source

Fig. 8. Enlarged view of fused image details^[2] (a) Quartz watch details enlarged, (b) Mechanical watch details enlarged, (c) USB drive details enlarged

Fig. 9. Schematic diagram of neutron imaging and X-ray imaging system^[30]1‒X-ray source, 2‒X-ray detector, 3‒Sample stage, 4‒Neutron source, 5‒Neutron detector, 7‒Support device

Fig. 10. Schematic diagram of the neutron and X-ray "quasi-homologous" design physical design model