scholarly journals Analytical and experimental determination of signal-to-noise ratio and figure of merit in three phase-contrast imaging techniques

2012 ◽  
Vol 20 (25) ◽  
pp. 27670 ◽  
Author(s):  
P.C. Diemoz ◽  
A. Bravin ◽  
M. Langer ◽  
P. Coan
Keyword(s):  
Experimental Determination ◽  
Phase Contrast ◽  
Figure Of Merit ◽  
Signal To Noise Ratio ◽  
Imaging Techniques ◽  
Phase Contrast Imaging ◽  
Contrast Imaging ◽  
Signal To Noise ◽  
Three Phase

scholarly journals Sensitivity of edge illumination X-ray phase-contrast imaging

2014 ◽  
Vol 372 (2010) ◽  
pp. 20130128 ◽  
Author(s):  
P. C. Diemoz ◽  
M. Endrizzi ◽  
A. Bravin ◽  
I. K. Robinson ◽  
A. Olivo
Keyword(s):  
Theoretical Model ◽  
Phase Contrast ◽  
Angular Resolution ◽  
Signal To Noise Ratio ◽  
Phase Contrast Imaging ◽  
High Angular Resolution ◽  
Contrast Imaging ◽  
Signal To Noise ◽  
X Ray ◽  
Set Up

Recently, we developed a theoretical model that can predict the signal-to-noise ratio for edge-like features in phase-contrast images. This model was then applied for the estimation of the sensitivity of three different X-ray phase-contrast techniques: propagation-based imaging, analyser-based imaging and grating interferometry. We show here how the same formalism can be used also in the case of the edge illumination (EI) technique, providing results that are consistent with those of a recently developed method for the estimation of noise in the retrieved refraction image. The new model is then applied to calculate, in the case of a given synchrotron radiation set-up, the optimum positions of the pre-sample aperture and detector edge to maximize the sensitivity. Finally, an example of the extremely high angular resolution achievable with the EI technique is presented.

scholarly journals Porosity Determination of Carbon and Glass Fibre Reinforced Polymers Using Phase-Contrast Imaging

2018 ◽  
Vol 38 (1) ◽  
Author(s):  
Christian Gusenbauer ◽  
Michael Reiter ◽  
Bernhard Plank ◽  
Dietmar Salaberger ◽  
Sascha Senck ◽  
...  
Keyword(s):  
Glass Fibre ◽  
Phase Contrast ◽  
Phase Contrast Imaging ◽  
Contrast Imaging ◽  
Reinforced Polymers ◽  
Glass Fibre Reinforced

Design, development and first experiments on the X-ray imaging beamline at Indus-2 synchrotron source RRCAT, India

2015 ◽  
Vol 22 (6) ◽  
pp. 1531-1539 ◽  
Author(s):  
A. K. Agrawal ◽  
B. Singh ◽  
Y. S. Kashyap ◽  
M. Shukla ◽  
P. S. Sarkar ◽  
...  
Keyword(s):  
Phase Contrast ◽  
Imaging Techniques ◽  
Phase Contrast Imaging ◽  
Design Development ◽  
Contrast Imaging ◽  
Synchrotron Source ◽  
Full Field ◽  
X Ray ◽  
X Ray Imaging ◽  
Micro Tomography

A full-field hard X-ray imaging beamline (BL-4) was designed, developed, installed and commissioned recently at the Indus-2 synchrotron radiation source at RRCAT, Indore, India. The bending-magnet beamline is operated in monochromatic and white beam mode. A variety of imaging techniques are implemented such as high-resolution radiography, propagation- and analyzer-based phase contrast imaging, real-time imaging, absorption and phase contrast tomographyetc. First experiments on propagation-based phase contrast imaging and micro-tomography are reported.

scholarly journals Absolute zinc quantification at the sub-cellular level by combined use of hard X-ray fluorescence and phase contrast imaging techniques

2013 ◽  
Vol 463 ◽  
pp. 012021 ◽  
Author(s):  
Ewelina Kosior ◽  
Sylvain Bohic ◽  
Heikki Suhonen ◽  
Peter Cloetens
Keyword(s):  
Phase Contrast ◽  
Imaging Techniques ◽  
Cellular Level ◽  
Phase Contrast Imaging ◽  
Contrast Imaging ◽  
X Ray ◽  
Combined Use

scholarly journals Comparison of propagation- and grating-based x-ray phase-contrast imaging techniques with a liquid-metal-jet source

2014 ◽  
Author(s):  
T. Zhou ◽  
U. Lundström ◽  
Thomas Thüring ◽  
S. Rutishauser ◽  
D. H. Larsson ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Phase Contrast ◽  
Imaging Techniques ◽  
Phase Contrast Imaging ◽  
Contrast Imaging ◽  
X Ray ◽  
Metal Jet

Determination of absolute turbulence amplitude by CO2 laser phase contrast imaging

2020 ◽  
Vol 15 (01) ◽  
pp. C01045-C01045
Author(s):  
T. Kinoshita ◽  
T. Maki ◽  
K. Tanaka ◽  
Y. Takemura
Keyword(s):  
Co2 Laser ◽  
Phase Contrast ◽  
Phase Contrast Imaging ◽  
Contrast Imaging

Suppression of Amplitude Effects In Bright-Field Stem Phase Contrast Imaging

1985 ◽  
Vol 43 ◽  
pp. 72-73
Author(s):  
J. H. Butler
Keyword(s):  
Phase Contrast ◽  
Signal To Noise Ratio ◽  
Phase Contrast Imaging ◽  
Bright Field Image ◽  
Contrast Effects ◽  
Contrast Imaging ◽  
Bright Field ◽  
Strong Phase ◽  
Pure Phase ◽  
Contrast Image

Nearly all past Investigations Into the nature of the bright field Image in the STEM as a function of detector aperture size are based on the Scherzer conditions for optimum Imaging. Consequently, they are of limited use when applied to any but the thinnest of specimens. Here we examine Image contrast and resolution as the Scherzer conditions are relaxed in conjunction with detector size, and show that Image quality for strong phase objects can be significantly Improved because, in a certain configuration, amplitude contrast effects can be eliminated, while the phase contrast signal to noise ratio assumes a relative maximum. Thus, if the user is willing to make small sacrifices (≅5%) in resolution and contrast, it should be possible to obtain an amplitude effect free, pure phase contrast Image even for slightly thicker specimens.

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