Medical imaging is a set of diagnostic techniques that noninvasively visualize internal anatomical structures and physiological processes using diverse physical modalities. Core methods include ionizing-radiation–based techniques (e.g., radiography, computed tomography, nuclear medicine, PET/SPECT), non-ionizing modalities (e.g., MRI, ultrasound, optical imaging), and hybrid systems (e.g., PET/CT, PET/MRI). These techniques exploit contrasts in tissue density, proton properties, acoustic impedance, or radiotracer distribution to generate qualitative and quantitative data. Medical imaging underpins clinical decision-making, image-guided interventions, treatment planning, and longitudinal monitoring, and increasingly incorporates advanced reconstruction algorithms, quantitative biomarkers, and AI-driven image analysis.
Recent advances in electronics and optics have opened new possibilities for terahertz (THz) waves—an invisible type of light that falls between infrared light and microwaves on the spectrum. The use of THz scattering for ...
Optics & Photonics
Jun 9, 2025
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Nanomedicines, especially those based on nanoparticles, are revolutionizing health care in terms of both diagnostics and therapeutics. These particles, often containing metals like iron or gold, can serve as contrast agents ...
Bio & Medicine
May 29, 2025
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Metalenses represent a revolutionary advancement in optical technology. Unlike conventional microscope objectives that rely on curved glass surfaces, metalenses employ nanoscale structures to manipulate light at the subwavelength ...
Optics & Photonics
May 28, 2025
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Imagine a medical scanner that works faster and produces clearer images, or a radiation detector that pinpoints tiny traces of radioactive material with unprecedented accuracy. These futuristic possibilities are a step closer ...
Nanophysics
May 20, 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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Researchers have developed an extremely thin, flexible imager that could be useful for noninvasively acquiring images from inside the body. The new technology could one day enable early and precise disease detection, providing ...
Optics & Photonics
May 19, 2025
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Conventional MRI scans, familiar to us from hospitals, have a resolution of about one-tenth of a millimeter, which allows them to image incredibly thin slices of our bodies from head to toe, helping physicians diagnose a ...
Nanophysics
May 19, 2025
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132
A research team led by Prof. Wang Hui from the Hefei Institutes of Physical Science (HFIPS) of the Chinese Academy of Sciences (CAS), in collaboration with researchers led by Prof. Qian Junchao from HFIPS and Prof. Qu Songnan ...
Bio & Medicine
May 6, 2025
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Health care professionals use tiny particles of gold (nanoparticles) for a variety of medical applications—from diagnostic imaging to cancer treatment. Gold works well for these applications because it doesn't cause adverse ...
Bio & Medicine
Apr 30, 2025
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A research team has developed an innovative biomimetic dual-mode magnetic resonance imaging (MRI) nanoprobe for detecting early-stage liver fibrosis in non-alcoholic fatty liver disease (NAFLD).
Bio & Medicine
Apr 22, 2025
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