Related Experiment Video
Updated: Jun 22, 2026
10:39
Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
Published on: October 11, 2016
A two-directional approach for grating based differential phase contrast imaging using hard x-rays
Optics Express
|June 18, 2009
Summary
This study introduces a two-directional approach for grating-based X-ray differential phase contrast imaging. The method ensures high-quality, artifact-free phase images for analysis, even when 1D methods fail.
Area of Science:
- Medical Imaging
- Physics
- Materials Science
Background:
- Grating-based X-ray differential phase contrast imaging offers advanced material and biological sample analysis.
- Traditional phase retrieval algorithms can struggle with complex samples, leading to artifacts.
- One-dimensional phase integration methods have limitations in certain imaging scenarios.
Purpose of the Study:
- To present a novel two-directional approach for grating-based X-ray differential phase contrast imaging.
- To emphasize the development of a robust phase retrieval algorithm for high-quality image generation.
- To demonstrate the method's efficacy in challenging imaging applications where 1D methods fail.
Main Methods:
- Development of a two-directional data acquisition strategy for X-ray differential phase contrast.
- Implementation and optimization of a phase retrieval algorithm tailored for artifact reduction.
- Application of the developed method to various sample types, including those problematic for 1D integration.
Main Results:
- Successful generation of artifact-free, high-quality phase images using the two-directional approach.
- Demonstration of superior performance compared to conventional 1D phase retrieval methods.
- Validation of the method's functionality in complex scenarios where 1D integration is inadequate.
Conclusions:
- The two-directional approach provides a significant advancement in X-ray differential phase contrast imaging.
- The optimized phase retrieval algorithm is crucial for quantitative analysis and image processing.
- This method expands the applicability of phase contrast imaging to a wider range of scientific and medical challenges.
Related Concept Videos
01:26Phase 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...
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...
02:18X-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...
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...
01:24X-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...
01:10X-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...
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...
01:29Determination of Crystal Structures
In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...