Fig. 1. Schematic of Fourier-transform ghost imaging (FGI)

Fig. 2. Flow chart of the Geant4 simulation

Fig. 3. FGI and CDI simulation results at different X-ray flux. (a) X-ray FGI results with 1 nm wavelength; (b) X-ray FGI results with 0.1 nm wavelength; (c) X-ray CDI results with 1 nm wavelength; (d) X-ray CDI results with 0.1 nm wavelength

Fig. 4. Compton scattering distribution of samples at different photon energies. (a)-(c) Scattering distribution of Au, Si, Hemoglobin in the X-ray system with 1 nm wavelength, respectively; (d)-(f) Scattering distribution of Au, Si, Hemoglobin in the X-ray system with 0.1 nm wavelength, respectively

Fig. 5. Scattering results of three samples at different photon energies. (a), (b) Curves of the coherent scattering photon number and the Compton scattering photon number of Au, Si, Hemoglobin samples varying with the photon energy; (c) Curves of the ratio of the coherent scattering photon number to the Compton scattering photon number varying with the photon energy

Fig. 6. X-ray FGI and CDI results with 0.1 nm wavelength at different flux. (a), (b), (c) X-ray FGI results with detecting flux of 0.1, 1, 10 , respectively; (d), (e), (f) X-ray CDI results with detecting flux of 0.1, 1, 10 , respectively 波长0.1 nm 的X射线FGI与CDI模拟结果。(a)、 (b)、 (c) X射线FGI结果，探测面光通量依次为0.1，1，10 ；(d)、 (e)、 (f) X射线CDI结果，探测面光通量依次为0.1，1，10

Fig. 7. X-ray FGI and CDI results with 1 nm wavelength at different flux. (a), (b), (c) X-ray FGI results with detecting flux of 0.1, 1, 10 , respectively; (d), (e), (f) X-ray CDI results with detecting flux of 0.1, 1, 10 , respectively 波长1 nm 的X射线FGI与CDI模拟结果。(a)、 (b)、 (c) 为X射线FGI结果，探测面光通量依次为0.1，1，10 ；(d)、 (e)、 (f) 为X射线CDI结果，探测面光通量依次为0.1，1，10

Table 1. SSIM comparison of X-ray FGI and CDI

Table 2. SSIM comparison of X-ray FGI and CDI with Compton scattering noise