Quantitative comparison of two phase-contrast techniques for mammograph.

Journal Article · Tue Feb 01 04:00:00 EST 2005 · ESRF Highlights

OSTI ID:925218

Pagot, E; Cloetens, P; Fiedler, S; Bravin, A; Coan, P; Fezzaa, K; Baruchel, J; Keirilayinen, J; ESRF,

Two x-ray phase contrast imaging techniques are compared in a quantitative way for future mammographic applications: diffraction enhanced imaging (DEI) and phase propagation imaging (PPI). DEI involves, downstream of the sample, an analyzer crystal acting as an angular filter for x-rays refracted by the sample. PPI simply uses the propagation (Fresnel diffraction) of the monochromatic and partially coherent x-ray beam over large distances. The information given by the two techniques is assessed by theoretical simulations and compared at the level of the experimental results for different kinds of samples (phantoms and real tissues). The imaging parameters such as the energy, the angular position of the analyzer crystal in the DEI case or the sample to detector distance in the PPI case were varied in order to optimize the image quality in terms of contrast, visibility and figure of merit.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 925218
• Report Number(s): ANL/XFD/JA-52251
• Journal Information: ESRF Highlights, Journal Name: ESRF Highlights Journal Issue: Feb. 2005
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

60 APPLIED LIFE SCIENCES
COMPARATIVE EVALUATIONS
DIFFRACTION
IMAGES
MAMMARY GLANDS
NEOPLASMS
PERFORMANCE
PHANTOMS
X-RAY EQUIPMENT