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Related Concept Videos

X-ray Imaging01:24

X-ray Imaging

German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with X-rays, and by 1900, X-ray was widely...
X-ray Diffraction of Biological Samples01:10

X-ray Diffraction of Biological Samples

X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are  scattered by the electron clouds around the sample atoms. The  X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal crystal...
X-ray Crystallography02:18

X-ray Crystallography

The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
Computed Tomography01:10

Computed Tomography

Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...

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High Spatial Resolution Chemical Imaging of Implant-Associated Infections with X-ray Excited Luminescence Chemical Imaging Through Tissue
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Reconstructive colour X-ray diffraction imaging--a novel TEDDI imaging method.

Olivier Lazzari1, Simon Jacques, Taha Sochi

  • 1Department of Chemistry, University College London, 20 Gordon Street, London, UK WC1H 0AJ.

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|August 18, 2009
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Tomographic Energy-Dispersive Diffraction Imaging (TEDDI) advances non-destructive 3D material analysis. New methods improve image quality by overcoming spatial distortion, paving the way for real-time X-ray imaging.

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Area of Science:

  • Materials Science
  • Physics
  • Imaging Technology

Background:

  • Tomographic Energy-Dispersive Diffraction Imaging (TEDDI) offers non-destructive 3D mapping of bulk objects.
  • TEDDI utilizes a full spectrum of X-ray signals for comprehensive analysis.
  • Current limitations include slow data acquisition and image distortion.

Purpose of the Study:

  • To overcome spatial distortion in TEDDI for improved image definition.
  • To develop a data-collection and reconstruction method for high-definition X-ray diffraction imaging.
  • To enable real-time visualization of materials chemistry evolution within opaque systems.

Main Methods:

  • Implemented a novel data-collection scenario and reconstruction routine.
  • Applied the developed methods to phantom test objects.
  • Validated the approach on real materials, including a carbonating cement block.

Main Results:

  • Successfully overcame the barrier of spatial distortion in TEDDI.
  • Achieved enhanced image definition in the reconstructed X-ray diffraction data.
  • Demonstrated the applicability of the method to complex material systems.

Conclusions:

  • The presented methods effectively address spatial distortion in TEDDI.
  • These procedures are transferable to emerging multi-detector array technologies.
  • This work is a significant step towards real-time, high-definition color X-ray diffraction imaging.