Large field of view grating interferometers for X-ray phase contrast imaging and CT at high energy

摘要

A device and method of the present disclosure provides large field-of-view Talbot-Lau phase contrast CT systems up to very high X-ray energy. The device includes microperiodic gratings tilted at glancing incidence and tiled on a single substrate to provide the large field-of-view phase contrast CT system. The present disclosure is a simple, economical, and accurate method for combining multiple GAIs into a larger FOV system, capable of performing phase-contrast tomography (PC-CT) on large objects. The device and method can be applied to medical X-ray imaging, industrial non-destructive testing, and security screening.

主权项

1. An interferometer device operable to condition incident X-rays in a high energy X-ray system comprising:
a substrate; multiple tiled micro-periodic gratings arranged in a fan shape on the substrate, wherein the gratings comprise absorbing bars and the absorbing bars are tilted at a glancing angle along the direction of the incident X-rays, and wherein the absorbing bars are aligned parallel with the incident X-rays, over a width equal or less than their beam collimation or vignetting width.