Damage to the brains of patients operated on for brain tumors may be assessed by measuring biomarkers in the blood pre- and postoperatively. A new study by University of Gothenburg researchers shows that the increase in markers ...
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Powerful magnetic pulses applied to the scalp to stimulate the brain can bring fast relief to many severely depressed patients for whom standard treatments have failed. Yet it's been a mystery exactly how transcranial magnetic ...
May 16, 2023
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Physicists and bioengineers can manipulate magnetically driven guidewires by using remote magnetic steering with scope for minimally invasive medical procedures. Magnetic steering strategies are presently limited by low magnetic ...
The touch of another person may increase levels of the "feel-good" hormone oxytocin. But the context really matters. The situation impacts oxytocin levels not only in the moment, but also later, as is shown by researchers ...
May 9, 2023
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After a long day of work or study, your brain might feel like it has been drained of energy. But does our brain burn more energy when engaging in mental athletics than it does during other activities, such as watching TV?
Apr 26, 2023
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An international team of 79 researchers have collaborated on a study published in Nature Medicine to delve into perivascular spaces (PVS), a poorly understood artifact seen in magnetic resonance imaging of cerebral small ...
High levels of the body's own cannabinoid substances protect against developing addiction in individuals previously exposed to childhood maltreatment, according to a new study from Linköping University in Sweden.
Apr 11, 2023
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Intelligence is partly heritable. There are studies that show that certain genetic variations are linked to better performance in intelligence tests. Other studies show that a variety of brain characteristics, such as network ...
Apr 4, 2023
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To survive, every cell in the body puts enormous energy into sustaining the right balance of water and essential electrolytes. Researchers at Oregon Health & Science University have developed a way to use magnetic resonance ...
Mar 31, 2023
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About half of adult human brain volume is made up of white matter. Lipid-rich myelin is a special structure formed by oligodendrocytes wrapping neuronal axons to form the major components of white matter. Abnormal myelin ...
Mar 27, 2023
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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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