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Related Concept Videos

Computed Tomography01:10

Computed Tomography

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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...
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X-ray Imaging01:24

X-ray Imaging

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

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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...
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Imaging Studies III: Computed Tomography01:27

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DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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Positron Emission Tomography01:29

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Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
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Electron Microscope Tomography and Single-particle Reconstruction01:07

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Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
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Updated: May 7, 2026

Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
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Fast grating-based X-ray phase-contrast tomosynthesis.

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    Summary
    This summary is machine-generated.

    A new fast grating-based phase-contrast tomosynthesis (GPC-Tomo) method combines X-ray tomosynthesis with phase-contrast imaging for improved soft tissue detection. The inner-focusing reconstruction technique enables faster imaging, enhancing clinical diagnostic efficiency.

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    Area of Science:

    • Medical Imaging
    • Biomedical Engineering
    • Radiology

    Background:

    • Digital X-ray tomosynthesis offers low radiation dose and enhanced contrast for clinical diagnoses.
    • X-ray phase-contrast imaging (PCI) excels at imaging low-density materials, showing potential for soft tissue detection.
    • Combining tomosynthesis with PCI could improve soft tissue imaging efficiency.

    Purpose of the Study:

    • To develop a rapid imaging method for phase-contrast tomosynthesis.
    • To integrate grating-based PCI with tomosynthesis, creating fast grating-based phase-contrast tomosynthesis (GPC-Tomo).
    • To introduce a novel inner-focusing (IF) image reconstruction method for GPC-Tomo.

    Main Methods:

    • Utilized an interlaced phase-stepping (PS) data collection method for accelerated data acquisition.
    • Developed and applied a novel inner-focusing (IF) image reconstruction algorithm.
    • Validated the proposed IF reconstruction method through experimental testing.

    Main Results:

    • The developed fast GPC-Tomo method demonstrated effectiveness.
    • The inner-focusing reconstruction method proved successful in achieving fast GPC-Tomo.
    • Experimental validation confirmed the proposed method's capabilities.

    Conclusions:

    • The developed fast GPC-Tomo, utilizing IF reconstruction, is an effective technique.
    • This method offers a faster approach to phase-contrast tomosynthesis.
    • The findings suggest improved efficiency for soft tissue detection in clinical diagnoses.