Double-exposure method for speckle-tracking x-ray phase-contrast microtomography

2021 ◽  
Vol 129 (7) ◽  
pp. 073101
Author(s):  
Fucheng Yu ◽  
Ke Li ◽  
Feixiang Wang ◽  
Haipeng Zhang ◽  
Xiaolu Ju ◽  
...  
Keyword(s):  
Speckle Tracking ◽  
Phase Contrast ◽  
Double Exposure ◽  
X Ray ◽  
Exposure Method

Speckle-tracking X-ray phase-contrast imaging for samples with obvious edge-enhancement effect

2017 ◽  
Vol 111 (17) ◽  
pp. 174101 ◽  
Author(s):  
Feixiang Wang ◽  
Yudan Wang ◽  
Gongxiang Wei ◽  
Guohao Du ◽  
Yanling Xue ◽  
...  
Keyword(s):  
Speckle Tracking ◽  
Phase Contrast ◽  
Phase Contrast Imaging ◽  
Enhancement Effect ◽  
Edge Enhancement ◽  
Contrast Imaging ◽  
X Ray

scholarly journals X-Ray Measurement of Stress by the Double Exposure Method

1969 ◽  
Vol 18 (195) ◽  
pp. 1034-1039
Author(s):  
Yasuo YOSHIOKA ◽  
Masao KOJIMA
Keyword(s):  
Double Exposure ◽  
X Ray ◽  
Exposure Method

Exploring experimental parameter choice for rapid speckle-tracking phase-contrast X-ray imaging with a paper analyzer

2015 ◽  
Vol 22 (5) ◽  
pp. 1279-1288 ◽  
Author(s):  
Isobel A. Aloisio ◽  
David M. Paganin ◽  
Christopher A. Wright ◽  
Kaye S. Morgan
Keyword(s):  
Real Time ◽  
Speckle Tracking ◽  
Phase Contrast ◽  
Experimental Parameter ◽  
Dynamic Imaging ◽  
Synchrotron Source ◽  
X Ray ◽  
Detector Distance ◽  
X Ray Imaging ◽  
Set Up

Phase-contrast X-ray imaging using a paper analyzer enables the visualization of X-ray transparent biological structures using the refractive properties of the sample. The technique measures the sample-induced distortions of a spatially random reference pattern to retrieve quantitative sample information. This phase-contrast method is promising for biomedical application due to both a simple experimental set-up and a capability for real-time imaging. The authors explore the experimental configuration required to achieve robustness and accuracy in terms of (i) the paper analyzer feature size, (ii) the sample-to-detector distance, and (iii) the exposure time. Results using a synchrotron source confirm that the technique achieves accurate phase retrieval with a range of paper analyzers and at exposures as short as 0.5 ms. These exposure times are sufficiently short relative to characteristic physiological timescales to enable real-time dynamic imaging of living samples. A theoretical guide to the choice of sample-to-detector distance is also derived. While the measurements are specific to the set-up, these guidelines, the example speckle images, the strategies for analysis in the presence of noise and the experimental considerations and discussion will be of value to those who wish to use the speckle-tracking paper analyzer technique.

scholarly journals Double-Exposure Method with Synchrotron White X-ray for Stress Evaluation of Coarse-Grain Materials

2020 ◽  
Vol 4 (3) ◽  
pp. 25
Author(s):  
Kenji Suzuki ◽  
Ayumi Shiro ◽  
Hidenori Toyokawa ◽  
Choji Saji ◽  
Takahisa Shobu
Keyword(s):  
High Energy ◽  
Coarse Grained ◽  
X Rays ◽  
Pixel Detector ◽  
Bending Stress ◽  
Double Exposure ◽  
X Ray ◽  
Area Detector ◽  
Exposure Method ◽  
Coarse Grained Material

Stress measurements of coarse-grained material are difficult using synchrotron X-ray diffraction because the diffraction patterns of coarse-grained materials are spotty. In addition, the center of the diffraction pattern is unknown for the transmitted X-ray beam. Here, a double-exposure method is proposed as the countermeasure against this issue. In the experiment, we introduce a CdTe pixel detector. The detector is a newly developed area detector and can resolve high-energy X-rays. The strains of the coarse-grained material can be measured using a combination of the double-exposure method, white synchrotron X-ray, and the CdTe pixel detector. The bending stress in an austenitic stainless steel plate was measured using the proposed technique. As a result, the measured stress corresponded to the applied bending stress.

scholarly journals Comparison of laboratory grating-based and speckle-tracking x-ray phase-contrast imaging

2017 ◽  
Vol 849 ◽  
pp. 012035 ◽  
Author(s):  
J. Romell ◽  
T. Zhou ◽  
M. Zdora ◽  
S. Sala ◽  
F.J. Koch ◽  
...  
Keyword(s):  
Speckle Tracking ◽  
Phase Contrast ◽  
Phase Contrast Imaging ◽  
Contrast Imaging ◽  
X Ray

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.

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