Tomography is a collection of imaging methods that reconstruct cross-sectional or volumetric representations of an object from measurements acquired along multiple paths or projections, typically using ionizing radiation, electromagnetic waves, or other penetrating signals. Mathematically, it is grounded in the inversion of integral transforms such as the Radon transform, often implemented via algorithms like filtered back-projection or iterative reconstruction. Tomographic methods, including X-ray computed tomography, positron emission tomography, and optical or acoustic tomography, are used to resolve internal spatial distributions of physical or biochemical properties with defined resolution, contrast mechanisms, and noise characteristics, enabling quantitative analysis in medical, biological, materials, and geophysical research.
A research team utilized teleseismic double-difference tomography technology to uncover the morphological changes of the Pacific subducting slab in the mantle transition zone beneath Northeast China.
Earth Sciences
May 29, 2025
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31
A research team affiliated with UNIST has announced the development of an innovative nonlinear imaging technique capable of visualizing internal biological tissues in 3D using ordinary light sources, such as laser pointers, ...
Bio & Medicine
May 20, 2025
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38
A research team led by Colorado State University has achieved a new milestone in 3D X-ray imaging technology. The scientists are the first to capture high-resolution CT scans of the interior of a large, dense object—a gas ...
Optics & Photonics
Mar 21, 2025
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167
Photon-counting CT scanning is the next-generation of computer tomography diagnostics, providing precise, multi-color imaging to simultaneously track biological processes.
Bio & Medicine
Jan 29, 2025
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16
Researchers have pioneered a new technique at the Swiss Light Source SLS called X-ray linear dichroic orientation tomography, which probes the orientation of a material's building blocks at the nanoscale in three-dimensions.
Nanomaterials
Dec 11, 2024
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51
A team of researchers led by Anna-Karin Gustavsson at Rice University has developed an innovative imaging platform that promises to improve our understanding of cellular structures at the nanoscale.
Bio & Medicine
Nov 27, 2024
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41
A research team has developed an advanced continuous rotational scanning photoacoustic computed tomography (PACT) system for rapid imaging of living organisms. The research is published in the journal Laser & Photonics Reviews.
Optics & Photonics
Nov 11, 2024
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29
An international research collaboration, including a group from Cornell Engineering, has applied a new X-ray-based reconstruction technique to observe, for the first time, topological defects in a nanoscale self-assembly-based ...
Nanomaterials
Jul 23, 2024
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83
High-speed volumetric imaging is an indispensable tool for investigating dynamic biological processes. Traditional scanning-based 3D imaging techniques, such as confocal microscopy, two-photon microscopy, and light-sheet ...
General Physics
Jun 26, 2024
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85
National University of Singapore (NUS) physicists have developed a computational imaging technique to extract three-dimensional (3D) information from a single two-dimensional (2D) electron micrograph. This method can be readily ...
Nanophysics
May 29, 2024
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