Contrast-to-noise in X-ray differential phase contrast imaging

被引：41

作者：

Engel, Klaus J. ^{[1
]}

Geller, D. ^{[1
]}

Koehler, T. ^{[2
]}

Martens, G. ^{[2
]}

Schusser, S. ^{[1
]}

Vogtmeier, G. ^{[1
]}

Roessl, E. ^{[2
]}

机构：

[1] Philips Technol GmbH, Forschungslab, D-52066 Aachen, Germany

[2] Philips Technol GmbH, Forschungslab, D-22335 Hamburg, Germany

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2011年 / 648卷

关键词：

X-ray differential phase contrast imaging; Grating-based interferometer; Talbot self-imaging; Contrast-to-noise ratio; Mammography; GRATING INTERFEROMETER; TOMOGRAPHY; SCATTERING;

D O I：

10.1016/j.nima.2010.11.169

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A quantitative theory for the contrast-to-noise ratio (CNR) in differential phase contrast imaging (DPCI) is proposed and compared to that of images derived from classical absorption contrast imaging (ACI). Most prominently, the CNR for DPCI contains the reciprocal of the spatial wavelength to be imaged, the fringe visibility, and a tunable factor dependent on the system geometry. DPCI is thus potentially beneficial especially for the imaging of small object structures. We demonstrate CNR calculations for mammography, finding optimal imaging energies between 15 and 22 key for ACI, and between 20 and 40 keV for DPCI. (c) 2010 Elsevier B.V. All rights reserved.

引用

页码：S202 / S207

页数：6

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