IMAGE RECONSTRUCTION METHODS FOR DIFFERENTIAL PHASE CONTRAST X-RAY IMAGING

摘要

An image reconstruction method for differential phase contrast imaging includes receiving data corresponding to a signal produced by an X-ray detector and corresponding to X-rays that passed through a subject and a grating system to reach the X-ray detector. The method also includes performing a fringe analysis on the received data. The fringe analysis includes a non-integer fringe fraction correction utilizing one or more adapted basis functions in the Fourier domain to determine one or more Fourier coefficients. A differential phase image of the subject is generated by utilizing the one or more Fourier coefficients.

主权项

1. A method for correcting for non-integer fringe fractions in differential phase contrast imaging, comprising:
receiving data corresponding to a measured signal; wherein the measured signal corresponds to an X-ray signal detected by a detector after passing through a subject located with a grating arrangement between an X-ray source and the detector; determining a basis function in the Fourier domain based on an initial offset value; fitting the data corresponding to the measured signal to the basis function; determining an adapted basis function in the Fourier domain based on a shifted offset value; and fitting the data corresponding to the measured signal to the adapted basis function.