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.
Soil-borne fungal pathogens are responsible for major agricultural losses worldwide, yet the way they invade and spread inside plant roots is still not fully understood. One of the most damaging species, Fusarium oxysporum, ...
Researchers have developed, for the first time in the world, incoherent dielectric tensor tomography (iDTT), a technology that can read complex three-dimensional optical fingerprints inside materials using only everyday LED ...
Optics & Photonics
May 7, 2026
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A migratory bird brain, the Eurasian blackcap (Sylvia atricapilla), has been mapped for the first time using high-resolution light microscopy. The open-source software tools developed, and the detailed processes published, ...
Biotechnology
Apr 20, 2026
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How do organic solar cells work on the inside? The answer lies in structures far too small to see—and difficult to access even with advanced techniques. So far, researchers have relied mainly on X-ray methods to understand ...
Nanophysics
Apr 15, 2026
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Florida's coral reefs are under siege. Since 2014, Stony Coral Tissue Loss Disease (SCTLD) has spread rapidly across the Florida Reef Tract and Caribbean, killing vast numbers of reef-building corals and leaving behind dead ...
Ecology
Apr 14, 2026
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How can magma buried 5, 10, or even 15 km underground be detected without any surface indicators? The answer lies in ambient noise tomography, a technique that analyzes natural ground vibrations with high precision. A team ...
Earth Sciences
Apr 14, 2026
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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 ...
