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.
There is substantial interest in understanding and designing of nanoengineered bacteria to combat various fatal cancerous diseases. However, conventional nanotechnological approaches adopt genetic manipulation for attenuating ...
Bio & Medicine
Feb 22, 2022
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A nanocomposite that absorbs X-rays and then, with nearly perfect efficiency, re-emits the captured energy as light, could help to improve high-resolution medical imaging and security screening. The material's near-100 percent ...
Nanophysics
Dec 15, 2021
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A new imaging technique developed by the teams of Professors Jinyang Liang and Fiorenzo Vetrone at the Institut national de la recherche scientifique (INRS) can quickly measure temperature in 2D without contact. The results ...
Bio & Medicine
Nov 9, 2021
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To realize precise diagnosis of early-stage cancer for effective treatment and better prognosis, high-resolution magnetic resonance imaging (MRI) is indispensable with the help of contrast agents. Iron-oxide-based T2 MR contrast ...
Bio & Medicine
Sep 15, 2021
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X-ray imaging is a fast and painless way for doctors to see inside a person. But radiation detectors, which go under the body part being imaged, are rigid panels that contain harmful heavy metals, such as lead and cadmium. ...
Nanomaterials
Aug 4, 2021
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277
A pond in summer can reveal more about a fish than a pond in winter. The fish living in icy conditions might remain still enough to study its scales, but to understand how the fish swims and behaves, it needs to freely move ...
Bio & Medicine
Jul 30, 2021
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Most of the tests that doctors use to diagnose cancer—such as mammography, colonoscopy, and CT scans—are based on imaging. More recently, researchers have also developed molecular diagnostics that can detect specific cancer-associated ...
Bio & Medicine
Jul 16, 2021
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