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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...
Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
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...
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...

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Related Experiment Video

Updated: May 27, 2026

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
10:39

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

Published on: October 11, 2016

Non-absorption grating approach for X-ray phase contrast imaging.

Yang Du1, Xin Liu, Yaohu Lei

  • 1Key Laboratory of Optoelectronics Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China.

Optics Express
|November 24, 2011
PubMed
Summary
This summary is machine-generated.

A novel X-ray phase contrast imaging technique uses a non-absorption grating approach. This method enhances image quality and offers a promising alternative for medical and industrial applications.

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Last Updated: May 27, 2026

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
10:39

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

Published on: October 11, 2016

High Spatial Resolution Chemical Imaging of Implant-Associated Infections with X-ray Excited Luminescence Chemical Imaging Through Tissue
07:48

High Spatial Resolution Chemical Imaging of Implant-Associated Infections with X-ray Excited Luminescence Chemical Imaging Through Tissue

Published on: September 30, 2022

Area of Science:

  • Medical Imaging
  • Physics
  • Materials Science

Background:

  • Traditional X-ray imaging relies on absorption, limiting contrast for certain materials.
  • Grating-based X-ray phase contrast imaging enhances contrast by detecting phase shifts, but absorption gratings have limitations.
  • Existing methods face challenges with higher X-ray photon energies and specific material types.

Purpose of the Study:

  • To demonstrate a non-absorption grating approach for X-ray phase contrast imaging.
  • To overcome limitations associated with absorption gratings in X-ray imaging.
  • To provide an alternative technique for improved X-ray phase contrast imaging.

Main Methods:

  • Development and construction of key devices for a non-absorption grating interferometer.
  • System establishment for X-ray phase contrast imaging.
  • Utilizing grating interferometry without absorption gratings.

Main Results:

  • Successful acquisition of phase contrast images.
  • Demonstrated a field of view larger than 5 centimeters.
  • Validated a non-absorption grating method for X-ray phase contrast imaging.

Conclusions:

  • The non-absorption grating approach is a viable alternative for X-ray phase contrast imaging.
  • This technique potentially improves image quality, especially at higher X-ray energies.
  • The method shows significant promise for future applications in medicine and industry.