Contrast enhancement of propagation based X-ray phase contrast imaging

Adam Pan; Ling Xu; Jon C. Petruccelli; Rajiv Gupta; George Barbastathis

doi:10.1117/12.2060605

5 September 2014 Contrast enhancement of propagation based X-ray phase contrast imaging

Adam Pan, Ling Xu, Jon C. Petruccelli, Rajiv Gupta, George Barbastathis

Author Affiliations +

Proceedings Volume 9209, Advances in Computational Methods for X-Ray Optics III; 92090R (2014) https://doi.org/10.1117/12.2060605
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

Abstract

We demonstrate a quantitative X-ray phase contrast imaging (XPCI) technique derived from propagation dependent phase change. We assume that the absorption and phase components are correlated and solve the Transport of Intensity Equation (TIE). The experimental setup is simple compared to other XPCI techniques; the only requirements are a micro-focus X-ray source with sufficient temporal coherence and an X-ray detector of sufficient spatial resolution. This method was demonstrated in three scenarios, the first of which entails identification of an index-matched sphere. A rubber and nylon sphere were immersed in water and imaged. While the rubber sphere could be plainly seen on a radiograph, the nylon sphere was only visible in the phase reconstruction. Next, the technique was applied to differentiating liquid samples. In this scenario, three liquid samples (acetone, water, and hydrogen peroxide) were analyzed using both conventional computed tomography (CT) and phase contrast CT. While conventional CT was capable of differentiating between acetone and the other two liquids, it failed to distinguish between water and hydrogen peroxide; only phase CT was capable of differentiating all three samples. Finally, the technique was applied to CT imaging of a human artery specimen with extensive atherosclerotic plaque. This scenario demonstrated the increased sensitivity to soft tissue compared to conventional CT; it also uncovered some drawbacks of the method, which will be the target of future work. In all cases, the signal-to-noise ratio of phase contrast was greatly enhanced relative to conventional attenuation-based imaging.

Citation Download Citation

Adam Pan, Ling Xu, Jon C. Petruccelli, Rajiv Gupta, and George Barbastathis "Contrast enhancement of propagation based X-ray phase contrast imaging", Proc. SPIE 9209, Advances in Computational Methods for X-Ray Optics III, 92090R (5 September 2014); https://doi.org/10.1117/12.2060605

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

X-rays

Tomography

X-ray imaging

Optical spheres

Phase contrast

Arteries

Absorption

Show All Keywords

Keywords/Phrases

Search In:

Publication Years