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)

Evaluation of Controlled-Drift Detectors in X-Ray Spectroscopic Imaging Applications

2009 ◽  
Vol 15 (3) ◽  
pp. 231-236 ◽  
Author(s):  
Andrea Castoldi ◽  
Chiara Guazzoni ◽  
Cigdem Ozkan ◽  
Giorgio Vedani ◽  
Robert Hartmann ◽  
...  
Keyword(s):  
Room Temperature ◽  
Contrast Imaging ◽  
Advanced Imaging ◽  
Fully Depleted ◽  
X Ray ◽  
Diffraction Enhanced Imaging ◽  
X Ray Imaging ◽  
X Ray Absorption ◽  
Absorption Contrast ◽  
Enhanced Imaging

AbstractA detector that looks promising for advanced imaging modalities—such as X-ray absorption contrast imaging, X-ray fluorescence imaging, and diffraction-enhanced imaging—is the controlled-drift detector (CDD). The CDD is a novel two-dimensional X-ray imager with energy resolving capability of spectroscopic quality. It is built on a fully depleted silicon wafer and features fast readout while being operated at or near room temperature. The use of CDDs in the aforementioned applications allows translating these techniques from synchrotron-based experiments to laboratory-size experiments using polychromatic X-ray generators. We have built a dedicated and versatile detection module based on a 36 mm2 CDD chip featuring pixels of 180 × 180 μm2, and we evaluated the system performance in different X-ray imaging applications both with synchrotron-based experiments and in the laboratory environment.

The CM120 Biotwin: a high-contrast objective lens, optimum cryo-vacuum and improved EDX performance

1995 ◽  
Vol 53 ◽  
pp. 584-585
Author(s):  
Uwe Lücken ◽  
Michael Felsmann ◽  
Wim M. Busing ◽  
Frank de Jong
Keyword(s):  
Life Science ◽  
Focal Length ◽  
Objective Lens ◽  
High Contrast ◽  
Contrast Imaging ◽  
X Ray ◽  
Forming Mechanism ◽  
Similar Image ◽  
High Contrast Imaging ◽  
Low Concentrations

A new microscope for the study of life science specimen has been developed. Special attention has been given to the problems of unstained samples, cryo-specimens and x-ray analysis at low concentrations.A new objective lens with a Cs of 6.2 mm and a focal length of 5.9 mm for high-contrast imaging has been developed. The contrast of a TWIN lens (f = 2.8 mm, Cs = 2 mm) and the BioTWTN are compared at the level of mean and SD of slow scan CCD images. Figure 1a shows 500 +/- 150 and Fig. 1b only 500 +/- 40 counts/pixel. The contrast-forming mechanism for amplitude contrast is dependent on the wavelength, the objective aperture and the focal length. For similar image conditions (same voltage, same objective aperture) the BioTWIN shows more than double the contrast of the TWIN lens. For phasecontrast specimens (like thin frozen-hydrated films) the contrast at Scherzer focus is approximately proportional to the √ Cs.

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.

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.

Common Foot and Ankle Disorders in Adults and Children

2015 ◽  
Vol 19 (2) ◽  
pp. 54-65 ◽  
Author(s):  
Ganesan Balasankar ◽  
Luximon Ameersing
Keyword(s):  
Soft Tissues ◽  
Adult Population ◽  
Complex Structure ◽  
Whole Body ◽  
Clinical Aspects ◽  
Foot Deformities ◽  
Foot And Ankle ◽  
Human Foot ◽  
Flat Feet ◽  
Adults And Children

The human foot is a complex structure, which includes bones, joints, muscles, ligaments, soft tissues, nerves and veins. It supports the weight of the whole body and helps one to walk, run, and jump. Ankle and foot biomechanical functions that are interrupted by various pathological deformities lead to pain or other deformities, and result in difficulties during mobility. Foot problems are very common in children and adults. In this article, attempts are made to explore the clinical aspects of the most common foot and ankle deformities and their management by children and adults. Foot deformities may be congenital or acquired, and may involve arthritis conditions, such as rheumatoid arthritis and osteoarthritis. In children, congenital clubfoot, cavus, and flat feet are the most common disorders and can be treated by non-operative means or surgical management. Hallux valgus and rigidus, lesser toe deformities, and arthritis are mostly present with or without pain in the adult population.

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
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