Fig. 1From: Acquisition of a single grid-based phase-contrast X-ray image using instantaneous frequency and noise filteringa–h Eight subset images of the head of the bio-sample. FA: Fourier analysis; IF: instantaneous frequency; Abs: absorption image; Scatt: scattering image; PCXI: phase-contrast X-ray image; dx: x-axis gradient image; Orig: originalBack to article page