Fig. 16From: Acquisition of a single grid-based phase-contrast X-ray image using instantaneous frequency and noise filteringAbsorption, scattering, and phase-contrast X-ray images obtained using Fourier analysis. 0 h: zeroth harmonic; 1 h: first harmonic; FT: Fourier transform; IFT: inverse Fourier transform; Abs: absorption image; Scatt: scattering image; PCXI: phase-contrast X-ray image; G: grid; SG: sample + gridBack to article page