Spherical-Wave Far-Field Interferometer for Hard X-Ray Phase Contrast Imaging
Abstract
Low dose, high contrast x-ray imaging is of general interest in medical diagnostic applications. X-ray Mach-Zehnder interferometers using collimated synchrotron beams demonstrate the highest levels of phase contrast under a given exposure dose. However, common x-ray sources emit divergent cone beams. Here, we developed a spherical-wave inline Mach-Zehnder interferometer for phase contrast imaging over an extended area with a broadband and divergent source. The first tabletop system was tested in imaging experiments of a mammographic accreditation phantom and various biological specimens. The noise level of the phase contrast images at a clinical radiation dose corresponded to a 6 nano radian bending of the x-ray wavefront. Un-resolved structures with conventional radiography and near-field interferometer techniques became visible at a fraction of the radiation dose.
Cite
@article{arxiv.1412.6824,
title = {Spherical-Wave Far-Field Interferometer for Hard X-Ray Phase Contrast Imaging},
author = {Houxun Miao and Andrew A. Gomella and Katherine J. Harmon and Eric E. Bennett and Nicholas Chedid and Alireza Panna and Priya Bhandarkar and Han Wen},
journal= {arXiv preprint arXiv:1412.6824},
year = {2014}
}