Simulations of phase imaging with polycapillary optics (Conference Presentation)

Jonathan C. Petruccelli; Bushra Kanwal; Carolyn A. MacDonald

doi:10.1117/12.2262714

7 June 2017 Simulations of phase imaging with polycapillary optics (Conference Presentation)

Jonathan C. Petruccelli, Bushra Kanwal, Carolyn A. MacDonald

Proceedings Volume 10187, Anomaly Detection and Imaging with X-Rays (ADIX) II; 1018704 (2017) https://doi.org/10.1117/12.2262714
Event: SPIE Defense + Security, 2017, Anaheim, CA, United States

Abstract

X-ray phase imaging is known to enhance contrast, particularly for low atomic number materials, for which absorption contrast is low. However, it requires spatial coherence which is typically achieved with a small (10 to 50 µm) source, or a grating placed in front of the source to essentially break it into multiple small sources. In a previous experiment, polycapillary focusing optics were shown to improve coherence when employed to focus x rays from a large spot rotating anode to a smaller secondary source. Edge-enhancement to noise ratios up to a value of 6.5 were obtained, and sufficiently high quality data was obtained from a single image to allow for phase reconstruction using a phase attenuation duality approach. Alternatively, polycapillary optics might operate in place of a source grating to effectively divide the source into a very large number of small channels. In order to examine the potential use of polycapillary optics to enhance phase imaging, the phase and coherence properties of the optic were modeled by observing the fringe visibility in a simulated Young’s double slit experiment. The optic was modeled using simple ray tracing in a Monte Carlo simulation, with the phase advance associated with each photon path computed from the path length and phase changes upon each reflection through the polycapillary tube. Fringes, which disappeared with a large source, were maintained after the optics, implying that beam coherence was observed for both the collimating and focusing polycapillary optics.

Conference Presentation

Citation Download Citation

Jonathan C. Petruccelli, Bushra Kanwal, and Carolyn A. MacDonald "Simulations of phase imaging with polycapillary optics (Conference Presentation)", Proc. SPIE 10187, Anomaly Detection and Imaging with X-Rays (ADIX) II, 1018704 (7 June 2017); https://doi.org/10.1117/12.2262714

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
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Monte Carlo methods

Phase imaging

Geometrical optics

Image quality

X-ray imaging

X-rays

Absorption

Show All Keywords

Keywords/Phrases

Search In:

Publication Years