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.
Taking images of tiny structures within cells is tricky business. One technique, cryogenic electron tomography (cryoET), shoots electrons through a frozen sample. The images formed by the electrons that emerge allow researchers ...
Cell & Microbiology
Jan 17, 2026
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Imaging technology has revolutionized paleontology, allowing scientists to study fossils that are buried deep in the rock or too small to handle. Two recent studies I was involved with show some of the technology's potential, ...
Evolution
Oct 23, 2025
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A team of Johns Hopkins researchers is using an innovative X-ray imaging approach to reveal how compression reshapes the tiny spaces and stresses within sandstone—findings that could predict how this common rock used for ...
Earth Sciences
Aug 21, 2025
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A small international team of volcanologists has built a more detailed picture of the Campi Flegrei caldera's internal structure using high-resolution seismic imaging and results from rock physics experiments conducted on ...
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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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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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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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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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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