Abstract
In order to quantitatively determine the projected electron densities of a sample, one needs to extract the monochromatic fringe phase shifts from the polychromatic fringe phase shifts measured in the grating interferometry with incoherent X-ray sources. In this work the authors propose a novel analytic approach that allows to directly compute the monochromatic fringe shifts from the polychromatic fringe shifts. This approach is validated with numerical simulations of several grating interferometry setups. This work provides a useful tool in quantitative imaging for biomedical and material science applications.
Highlights
X-ray grating interferometry is a differential X-ray phase-contrast imaging technique that has attracted intensive research efforts in recent years
This approach is valid only if the polychromatic and monochromatic fringe phase shifts are of few degrees and both have the same sign
In this work we proposed a general analytic approach, assuming the effective spectrum is known
Summary
X-ray grating interferometry is a differential X-ray phase-contrast imaging technique that has attracted intensive research efforts in recent years. This is because this technique may provide highly sensitive means for imaging soft tissues and low-Z materials, it has many potential applications in medical imaging and material science [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]. The phase grating G1 serves as a beam splitter to generate interference fringes, which is recorded by the imaging detector. One may place an absorbing grating in front of the detector, and this grating serves as a fringe analyzer, which will be used when the fringe period is too small to be resolved by the detector pixels [4, 15]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
