An extended diffraction-enhanced imaging method for implementing multiple-image radiography
Journal
Physics in Medicine and Biology
Journal Volume
52
Journal Issue
7
Pages
1923-1945
Date Issued
2007
Author(s)
Anastasio, Mark A.
Brankov, Jovan G.
Wernick, Miles N.
Brey, Eric M.
Connor Jr., Dean M.
Zhong, Zhong
Abstract
Diffraction-enhanced imaging (DEI) is an analyser-based x-ray imaging method that produces separate images depicting the projected x-ray absorption and refractive properties of an object. Because the imaging model of DEI does not account for ultra-small-angle x-ray scattering (USAXS), the images produced in DEI can contain artefacts and inaccuracies in medical imaging applications. In this work, we investigate an extended DEI method for concurrent reconstruction of three images that depict an object's projected x-ray absorption, refraction and USAXS properties. The extended DEI method can be viewed as an implementation of the recently proposed multiple-image radiography paradigm. Validation studies are conducted by use of computer-simulated and synchrotron measurement data.
Type
journal article