scholarly journals X-ray Phase-contrast Imaging Study of Voids and Fibres in a Polymer Matrix

1995 ◽  
Vol 48 (1) ◽  
pp. 103 ◽  
Author(s):  
Dachao Gao ◽  
Timothy J Davis ◽  
Stephen W Wilkins
Keyword(s):  
Numerical Simulations ◽  
Polymer Matrix ◽  
Phase Contrast ◽  
Imaging Study ◽  
Phase Contrast Imaging ◽  
X Rays ◽  
Asymmetric Channel ◽  
Contrast Imaging ◽  
X Ray ◽  
Glass Fibres

We report X-ray phase-contrast images of voids and glass fibres in a polymer matrix. The phase-contrast images are obtained using both a monolithic 3-refiection asymmetric channel-cut monochromator and analyser with 1�54 A X-rays. The mechanisms of contrast formation in the images of voids and glass fibres are discussed in detail and numerical simulations of the images are found to agree with the experiments.

scholarly journals Towards tender X-rays with Zernike phase-contrast imaging of biological samples at 50 nm resolution

2014 ◽  
Vol 21 (4) ◽  
pp. 790-794 ◽  
Author(s):  
Ismo Vartiainen ◽  
Martin Warmer ◽  
Dennis Goeries ◽  
Eva Herker ◽  
Rudolph Reimer ◽  
...  
Keyword(s):  
Phase Contrast ◽  
Three Dimensional ◽  
Phase Contrast Imaging ◽  
X Rays ◽  
Contrast Imaging ◽  
Full Field ◽  
X Ray ◽  
Lipid Droplet Formation ◽  
Contrast Microscope ◽  
Science Application

X-ray microscopy is a commonly used method especially in material science application, where the large penetration depth of X-rays is necessary for three-dimensional structural studies of thick specimens with high-Zelements. In this paper it is shown that full-field X-ray microscopy at 6.2 keV can be utilized for imaging of biological specimens with high resolution. A full-field Zernike phase-contrast microscope based on diffractive optics is used to study lipid droplet formation in hepatoma cells. It is shown that the contrast of the images is comparable with that of electron microscopy, and even better contrast at tender X-ray energies between 2.5 keV and 4 keV is expected.

X-ray phase-contrast imaging study of soft tissue and bone samples

1999 ◽  
Author(s):  
Dachao Gao ◽  
Andrew Pogany ◽  
Andrew W. Stevenson ◽  
Timur E. Gureyev ◽  
Stephen W. Wilkins
Keyword(s):  
Soft Tissue ◽  
Phase Contrast ◽  
Imaging Study ◽  
Phase Contrast Imaging ◽  
Contrast Imaging ◽  
X Ray ◽  
Title X

scholarly journals Hard X-ray phase-contrast imaging with the Compact Light Source based on inverse Compton X-rays

2008 ◽  
Vol 16 (1) ◽  
pp. 43-47 ◽  
Author(s):  
Martin Bech ◽  
Oliver Bunk ◽  
Christian David ◽  
Ronald Ruth ◽  
Jeff Rifkin ◽  
...  
Keyword(s):  
Light Source ◽  
Phase Contrast ◽  
Phase Contrast Imaging ◽  
X Rays ◽  
Contrast Imaging ◽  
X Ray ◽  
Inverse Compton ◽  
Compact Light Source

Image Quality Analysis of X-ray Grating Interferometer Using Integrating-bucket Method

2020 ◽  
Vol 64 (2) ◽  
pp. 20503-1-20503-5
Author(s):  
Faiz Wali ◽  
Shenghao Wang ◽  
Ji Li ◽  
Jianheng Huang ◽  
Yaohu Lei ◽  
...  
Keyword(s):  
Image Quality ◽  
Phase Contrast ◽  
Quality Analysis ◽  
Phase Contrast Imaging ◽  
Phase Image ◽  
Contrast Imaging ◽  
High Quality ◽  
Image Quality Analysis ◽  
X Ray ◽  
Grating Interferometer

Abstract Grating-based x-ray phase-contrast imaging has the potential to enhance image quality and provide inner structure details non-destructively. In this work, using grating-based x-ray phase-contrast imaging system and employing integrating-bucket method, the quantitative expressions of signal-to-noise ratios due to photon statistics and mechanical error are analyzed in detail. Photon statistical noise and mechanical error are the main sources affecting the image noise in x-ray grating interferometry. Integrating-bucket method is a new phase extraction method translated to x-ray grating interferometry; hence, its image quality analysis would be of great importance to get high-quality phase image. The authors’ conclusions provide an alternate method to get high-quality refraction signal using grating interferometer, and hence increases applicability of grating interferometry in preclinical and clinical usage.

Numerical analysis of shift error in X-ray phase contrast imaging for large field of view

2017 ◽  
Vol 34 (1) ◽  
pp. 8
Author(s):  
Jianheng Huang ◽  
Yaohu Lei ◽  
Xin Liu ◽  
Jinchuan Guo ◽  
Ji Li ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Phase Contrast ◽  
Field Of View ◽  
Phase Contrast Imaging ◽  
Large Field ◽  
Contrast Imaging ◽  
X Ray

scholarly journals Principles of Different X-ray Phase-Contrast Imaging: A Review

2021 ◽  
Vol 11 (7) ◽  
pp. 2971
Author(s):  
Siwei Tao ◽  
Congxiao He ◽  
Xiang Hao ◽  
Cuifang Kuang ◽  
Xu Liu
Keyword(s):  
Biological Samples ◽  
Phase Contrast ◽  
Recent Progress ◽  
Phase Contrast Imaging ◽  
Contrast Imaging ◽  
X Ray ◽  
X Ray Imaging ◽  
Internal Structures ◽  
X Ray Absorption ◽  
Made In

Numerous advances have been made in X-ray technology in recent years. X-ray imaging plays an important role in the nondestructive exploration of the internal structures of objects. However, the contrast of X-ray absorption images remains low, especially for materials with low atomic numbers, such as biological samples. X-ray phase-contrast images have an intrinsically higher contrast than absorption images. In this review, the principles, milestones, and recent progress of X-ray phase-contrast imaging methods are demonstrated. In addition, prospective applications are presented.

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