News tagged with magnetic resonance
Anything you can do I can do better: Neuromolecular foundations of the superiority illusion (Update)
(Medical Xpress)—The existential psychologist Rollo May wrote that "depression is the inability to construct a future"1 while Lionel Tiger stated that "optimism has been central to the process of human e ...
Neuroscience
Apr 02, 2013 |
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Face the facts: Neural integration transforms unconscious face detection into conscious face perception
(Medical Xpress)—The apparent ease and immediacy of human perception is deceptive, requiring highly complex neural operations to determine the category of objects in a visual scene. Nevertheless, the human ...
Neuroscience
Dec 31, 2012 |
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Hit a 95 mph baseball? Scientists pinpoint how we see it coming
(Medical Xpress)—How does San Francisco Giants slugger Pablo Sandoval swat a 95 mph fastball, or tennis icon Venus Williams see the oncoming ball, let alone return her sister Serena's 120 mph serves? For ...
Neuroscience
May 08, 2013 |
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Lost your keys? Your cat? The brain can rapidly mobilize a search party
A contact lens on the bathroom floor, an escaped hamster in the backyard, a car key in a bed of gravel: How are we able to focus so sharply to find that proverbial needle in a haystack? Scientists at the University ...
Neuroscience
Apr 21, 2013 |
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Amputee phantom pain linked to brain retaining picture of missing limb
Changes in the brain following amputation have been linked to pain arising from the missing limb, called 'phantom pain', in an Oxford University brain imaging study.
Neuroscience
Mar 05, 2013 |
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Your brain on Big Bird: Sesame Street helps to reveal patterns of neural development
Using brain scans of children and adults watching Sesame Street, cognitive scientists are learning how children's brains change as they develop intellectual abilities like reading and math.
Neuroscience
Jan 03, 2013 |
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Assessing the effects of cell phone radiation on brain tissue
Researchers have found a novel, non-invasive technique for measuring brain hot spots caused by electromagnetic radiation from mobile phones, according to a study published today.
Medical research
Dec 17, 2012 |
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Meditation produces enduring changes in emotional processing in the brain, study shows
A new study has found that participating in an 8-week meditation training program can have measurable effects on how the brain functions even when someone is not actively meditating. In their report in the ...
Neuroscience
Nov 12, 2012 |
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Detection, analysis of 'cell dust' may allow diagnosis, monitoring of brain cancer
A novel miniature diagnostic platform using nuclear magnetic resonance (NMR) technology is capable of detecting minuscule cell particles known as microvesicles in a drop of blood. Microvesicles shed by cancer ...
Medical research
Nov 11, 2012 |
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Research discovers two opposite ways our brain voluntarily forgets unwanted memories
If only there were a way to forget that humiliating faux pas at last night's dinner party. It turns out there's not one, but two opposite ways in which the brain allows us to voluntarily forget unwanted memories, ...
Neuroscience
Oct 17, 2012 |
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Study links hippocampus with unconscious bias
(Medical Xpress)—A new US study into brain function has found links between preferences and the regions of the brain involved in connecting new memories to old ones. The associations formed provide shortcuts ...
Neuroscience
Oct 12, 2012 |
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3-year study finds significant differences in white matter processes related to children's reading development
(Medical Xpress)—Researchers from Stanford and Israel's Bar Ilan University have found that differences in the rates at which white matter develops in children's brains may, as they write in their paper ...
Neuroscience
Oct 09, 2012 |
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Compassion meditation may boost neural basis of empathy, study finds
(Medical Xpress)—A compassion-based meditation program can significantly improve a person's ability to read the facial expressions of others, finds a study published by Social Cognitive and Affective Neuroscience. ...
Psychology & Psychiatry
Oct 04, 2012 |
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How memory load leaves us 'blind' to new visual information
(Medical Xpress)—Trying to keep an image we've just seen in memory can leave us blind to things we are 'looking' at, according to the results of a new study supported by the Wellcome Trust.
Neuroscience
Oct 01, 2012 |
4.3 / 5 (3) |
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Autistic adults have unreliable neural responses, study finds
Autism is a disorder well known for its complex changes in behavior—including repeating actions over and over and having difficulty with social interactions and language. Current approaches to understanding ...
Neuroscience
Sep 19, 2012 |
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Magnetic resonance imaging
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.
For more information about Magnetic resonance imaging, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
