scholarly journals Visibility of Polychromatic Grating-Based X-Ray Imaging Systems Based on Wave-Optical Theories and Frequency Domain Analysis

2021 ◽  
Vol 9 ◽  
Author(s):  
Xiaohua Zhu ◽  
Chengpeng Wu ◽  
Hewei Gao ◽  
Xi Zhang ◽  
Li Zhang
Keyword(s):  
Analytical Form ◽  
Frequency Domain Analysis ◽  
Real Space ◽  
Optical Simulation ◽  
Contrast Imaging ◽  
X Ray ◽  
Design And Optimization ◽  
X Ray Imaging ◽  
And Performance ◽  
Relationship Of

Grating-based X-ray phase-contrast imaging and tomography, applicable with traditional polychromatic X-ray tubes, have shown great potential for future applications of imaging with multimodal information indicating materials and microstructures simultaneously. The parameters and performance of the grating system could be simulated by a wave-optical simulation framework and proved feasible for the design and optimization of both coherent and incoherent gratings systems. However, the simulation involves real-space point-wise calculation of the Fourier transformation, and the direct expression of the relationship of the parameters was absent. In this work, we analyzed the Fourier domain characteristics of the simulated system and the presented visibility of the system of different energies in an analytical form. The derived direct expression which omitted the simulation process was validated with results of both simulation and real experiments and may help future designs, optimizations and studies of the energy-resolved characteristics of the system.

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.

scholarly journals Simultaneous Reciprocal and Real Space X-Ray Imaging of Time-Evolving Systems

2021 ◽  
Vol 15 (4) ◽  
Author(s):  
Matias Kagias ◽  
Zhentian Wang ◽  
Goran Lovric ◽  
Konstantins Jefimovs ◽  
Marco Stampanoni
Keyword(s):  
Real Space ◽  
X Ray ◽  
Evolving Systems ◽  
X Ray Imaging

X-ray imaging with ultra-small-angle X-ray scattering as a contrast mechanism

2004 ◽  
Vol 37 (5) ◽  
pp. 757-765 ◽  
Author(s):  
L. E. Levine ◽  
G. G. Long
Keyword(s):  
Small Angle ◽  
Imaging Technique ◽  
Three Dimensional ◽  
Sample Volume ◽  
Contrast Imaging ◽  
X Ray ◽  
X Ray Scattering ◽  
X Ray Imaging ◽  
Contrast Mechanism ◽  
Ray Scattering

A new transmission X-ray imaging technique using ultra-small-angle X-ray scattering (USAXS) as a contrast mechanism is described. USAXS imaging can sometimes provide contrast in cases where radiography and phase-contrast imaging are unsuccessful. Images produced at different scattering vectors highlight different microstructural features within the same sample volume. When used in conjunction with USAXS scans, USAXS imaging provides substantial quantitative and qualitative three-dimensional information on the sizes, shapes and spatial arrangements of the scattering objects. The imaging technique is demonstrated on metal and biological samples.

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.

The feasibility of utilizing the mid-energy in-line phase-contrast imaging system in the breast x-ray imaging

2020 ◽  
Author(s):  
Farid H. Omoumi ◽  
Muhammad U. Ghani ◽  
Molly D. Wong ◽  
Yuchen Qiu ◽  
Yuhua Li ◽  
...  
Keyword(s):  
Phase Contrast ◽  
Imaging System ◽  
Phase Contrast Imaging ◽  
Contrast Imaging ◽  
X Ray ◽  
X Ray Imaging

Investigation of (micro-)meteoritic materials at the new hard X-ray imaging PUMA beamline for heritage sciences

2019 ◽  
Vol 26 (6) ◽  
pp. 2033-2039 ◽  
Author(s):  
Pieter Tack ◽  
Benjamin Bazi ◽  
Bart Vekemans ◽  
Tulin Okbinoglu ◽  
Flore Van Maldeghem ◽  
...  
Keyword(s):  
Analytical Techniques ◽  
X Ray Diffraction ◽  
Contrast Imaging ◽  
X Ray ◽  
High Profile ◽  
Imaging Tool ◽  
X Ray Imaging ◽  
Synchrotron Facility ◽  
Wide Range ◽  
New Instrument

At the French synchrotron facility SOLEIL, a new X-ray imaging facility PUMA (Photons Utilisés pour les Matériaux Anciens) has been made available to scientific communities studying materials from cultural heritage. This new instrument aims to achieve 2D and 3D imaging with microscopic resolution, applying different analytical techniques including X-ray fluorescence spectroscopy (XRF), X-ray absorption spectroscopy (XAS), X-ray diffraction and phase-contrast imaging. In order to discover its capabilities a detailed analytical characterization of this beamline as an analytical and imaging tool is deemed necessary. In this work, (confocal) XRF and XAS analyses are demonstrated using the Seymchan pallasite meteorite and an Antarctic unmelted micrometeorite as case studies. The obtained spatial resolution (2 µm × 3 µm) and sensitivity (detection limits <10 p.p.m. for 1 s acquisition at 18 keV) show that PUMA is a competitive state-of-the-art beamline, providing several high-profile and high-in-demand analytical methods while maintaining applicability towards a wide range of heritage-oriented sciences.

Radiography of Soft Tissue of the Foot and Ankle with Diffraction Enhanced Imaging

2004 ◽  
Vol 94 (3) ◽  
pp. 315-322 ◽  
Author(s):  
Jun Li ◽  
Zhong Zhong ◽  
Roy Lidtke ◽  
Klaus E. Kuettner ◽  
Charles Peterfy ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
Soft Tissues ◽  
Foot And Ankle ◽  
Contrast Imaging ◽  
X Ray ◽  
Human Foot ◽  
Diffraction Enhanced Imaging ◽  
High Contrast Imaging ◽  
X Ray Imaging ◽  
Calcified Tissues

Non-calcified tissues, including tendons, ligaments, adipose tissue and cartilage, are not visible, for any practical purposes, with conventional X-ray imaging. Therefore, any pathological changes in these tissues generally necessitate detection through magnetic resonance imaging or ultrasound technology. Until recently the development of an X-ray imaging technique that could detect both bone and soft tissues seemed unrealistic. However, the introduction of diffraction enhanced X-ray imaging (DEI) which is capable of rendering images with absorption, refraction and scatter rejection qualities has allowed detection of specific soft tissues based on small differences in tissue densities. Here we show for the first time that DEI allows high contrast imaging of soft tissues, including ligaments, tendons and adipose tissue, of the human foot and ankle. (J Am Podiatr Med Assoc 94(3): 315–322, 2004)

scholarly journals X-Ray Phase-Contrast Imaging with Three 2D Gratings

2008 ◽  
Vol 2008 ◽  
pp. 1-8 ◽  
Author(s):  
Ming Jiang ◽  
Christopher Lee Wyatt ◽  
Ge Wang
Keyword(s):  
Numerical Simulation ◽  
Phase Contrast ◽  
Phase Retrieval ◽  
Phase Contrast Imaging ◽  
Talbot Effect ◽  
Contrast Imaging ◽  
Preclinical Imaging ◽  
X Ray ◽  
X Ray Imaging ◽  
Contrast Mechanism

X-ray imaging is of paramount importance for clinical and preclinical imaging but it is fundamentally restricted by the attenuation-based contrast mechanism, which has remained essentially the same since Roentgen's discovery a century ago. Recently, based on the Talbot effect, groundbreaking work was reported using 1D gratings for X-ray phase-contrast imaging with a hospital-grade X-ray tube instead of a synchrotron or microfocused source. In this paper, we report an extension using 2D gratings that reduces the imaging time and increases the accuracy and robustness of phase retrieval compared to current grating-based phase-contrast techniques. Feasibility is demonstrated via numerical simulation.

scholarly journals Preparation and performance of non-enzymatic glucose sensor electrode based on nanometer cuprous oxide

2018 ◽  
Vol 8 ◽  
pp. 184798041879352 ◽  
Author(s):  
Xiaojiao Yu ◽  
Jie Zhang ◽  
Xiyan Tang ◽  
Yuchen Wei ◽  
Song Kou ◽  
...  
Keyword(s):  
Thin Film ◽  
Cuprous Oxide ◽  
Glucose Sensor ◽  
Oxide Thin Film ◽  
Film Electrode ◽  
Film Sensor ◽  
X Ray ◽  
Structures And Properties ◽  
And Performance ◽  
Relationship Of

Cuprous oxide nanometer thin-film electrodes of different structures were successfully prepared by electrochemical deposition. The structures and properties of the samples were characterized by X-ray diffractometer, ultraviolet–visible and scanning electron microscope. The cuprous oxide thin-film electrode was used as a non-enzymatic glucose sensor, and the electrocatalytic response of the sensor for glucose was investigated by cyclic voltammetry. Results showed that cuprous oxide with higher purity, neat morphology structure and uniform grain size was prepared. The cuprous oxide nanometer thin-film sensor with a sword-shaped dendrite has a good response to glucose. Moreover, it has a good linear relationship of 1–20 mg·L−1 in the range of glucose concentration, a correlation coefficient of 0.997, a detection limit of 0.337 mg·L−1, a sensitivity of 23.24 mA·cm−2·mM−1 and good stability. Therefore, it has potential for application in sensors.

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