Using an advanced scanner, researchers from Aarhus University, among others, have developed a technology that can detect the earliest changes in the kidney when scar tissue begins to form. Their study is published in the ...
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Distension of the membranous labyrinth is seen in histologic specimens from deceased patients with symptoms consistent with Meniere disease and in magnetic resonance imaging (MRI) from patients exhibiting classic Meniere ...
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Port wine stains—capillary malformations on the skin—are the most visible manifestation of Sturge-Weber syndrome. However, up to 60% of babies with birthmarks in high-risk locations (forehead and upper eyelid) also have ...
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New research shows that the brains of sighted and blind people adapt in a similar way when they learn to use sound echoes to understand the world without vision.
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Seventy-nine-year-old Genevieve Lane volunteered to take the Alzheimer's drug Leqembi in a clinical trial because she was forgetting words and misplacing her keys.
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Magnetic Resonance Imaging (MRI), or nuclear magnetic resonance imaging (NMRI), is primarily a medical imaging technique most commonly used in radiology to visualize the internal structure and function of the body. MRI provides much greater contrast between the different soft tissues of the body than computed tomography (CT) does, making it especially useful in neurological (brain), musculoskeletal, cardiovascular, and oncological (cancer) imaging. Unlike CT, it uses no ionizing radiation, but uses a powerful magnetic field to align the nuclear magnetization of (usually) hydrogen atoms in water in the body. Radio frequency (RF) fields are used to systematically alter the alignment of this magnetization, causing the hydrogen nuclei to produce a rotating magnetic field detectable by the scanner. This signal can be manipulated by additional magnetic fields to build up enough information to construct an image of the body.:36
Magnetic Resonance Imaging is a relatively new technology. The first MR image was published in 1973 and the first cross-sectional image of a living mouse was published in January 1974. The first studies performed on humans were published in 1977. By comparison, the first human X-ray image was taken in 1895.
Magnetic Resonance Imaging was developed from knowledge gained in the study of nuclear magnetic resonance. In its early years the technique was referred to as nuclear magnetic resonance imaging (NMRI). However, as the word nuclear was associated in the public mind with ionizing radiation exposure it is generally now referred to simply as MRI. Scientists still use the term NMRI when discussing non-medical devices operating on the same principles. The term Magnetic Resonance Tomography (MRT) is also sometimes used.
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