Fig. 1. Experimental setup of X-ray GI using a thermal X-ray source and the results^[26]. (a) Experimental setup for X-ray GI using a thermal X-ray source; (b) complete frame with marked positions of the reference and bucket beams; (c) (d) close-up views of the reference and bucket beams; (f)--(h) ghost images obtained by Fourier filtering with the three frequency windows displayed in Fig. 1(e)

Fig. 2. Experimental setup for X-ray FGI using a pseudothermal X-ray source and the results^[27]. (a) Experimental setup for X-ray FGI using a pseudothermal X-ray source; (b) (c) amplitude and phase distributions of the reconstructed sample’s transmittance

Fig. 3. Quantum imaging with incoherently scattered light from a free-electron laser^[34]. (a) Experimental setup for quantum imaging with incoherently scattered light from a free-electron laser; (b) 10800 single-shot speckle patterns are processed to obtain correlation function g⁽⁴⁾; (c) scanning electron microscopy image of the hole mask; (d) reconstructed image of the hole mask after evaluating

Fig. 4. Experimental setup for tabletop X-ray GI and the imaging results^[38]. (a) Experimental scheme; (b) ghost image of “CAS”; (c) ghost image of the shell

Fig. 5. Experimental setup for X-ray GT and the results^[41]. (a) Experimental setup for X-ray GT; (b)(c) horizontal and vertical 2D slices of the 3D X-ray GT reconstructed object; (d) a semitransparent rendering of the 3D GT reconstructed object

Fig. 6. Schematic setup of ghost imaging used at FLASH and the results^[43]. (a) Conceptual layout of a ghost imaging experiment; (b) schematic setup of ghost imaging used at FLASH; (c) (d) reference signal without and with intensity normalization; (e) averaged image obtained by the bucket detector

Fig. 7. Experimental setup for GI with paired X-ray entangled photons and the results^[47]. (a) Experimental setup for GI with paired X-ray entangled photons; (b)(c) ghost imaging of 4-mm and 2-mm slits, in which the circles represent the data of the reconstructed image and the triangles represent data obtained by direct measurement through a scanning slit behind the object

Fig. 8. Schematic for atomic ghost imaging and the results^[29]. (a) Schematic for atomic ghost imaging; (b) correlation function; (c) experimental result

Fig. 9. Schematic for neutron ghost imaging and the imaging results^[28]. (a) Record of spatially random illumination patterns; (b) record of bucket signals; (c) results for neutron ghost imaging

Fig. 10. Experimental results of neutron ghost imaging and reconstruction results after CNN^[63]

Fig. 11. Light path diagram of the electron ghost imaging experiment and the results^[30]. (a) Light path diagram of the electron ghost imaging experiment; (b) experimental results