News tagged with magnetic resonance
You're standing near an airport luggage carousel and your bag emerges on the conveyor belt, prompting you to spring into action. How does your brain make the shift from passively waiting to taking action when ...
Neuroscience 8 hours ago | 5 / 5 (1) | 0 |
(Medical Xpress)—A powerful new way of imaging kidneys is providing scientists with insights into the importance of the body's filtering system and how it is affected by cardiovascular disease, stroke and ...
Diseases, Conditions, Syndromes May 20, 2013 | not rated yet | 0
(HealthDay)—The presence of retrolisthesis in patients undergoing decompressive surgery for a lumbar disc herniation may result in significantly worse lower back pain and physical function over four years, ...
Diseases, Conditions, Syndromes May 16, 2013 | not rated yet | 0
Metal-on-metal hip implants can cause inflammation of the joint lining (synovitis) long before symptoms appear, and magnetic resonance imaging (MRI) can be used to identify this inflammation, according to ...
Surgery May 15, 2013 | not rated yet | 0
A study released today by George Washington University School of Public Health and Health Services (SPHHS) researchers offers an in-depth look at hospitals nationwide and admissions to intensive care units (ICU). The study, ...
Health May 14, 2013 | not rated yet | 0
New approaches to applying noninvasive imaging tests such as computed tomography (CT), magnetic resonance (MR), and positron emission tomography (PET) may play a bigger role in evaluating and managing patients ...
Diabetes May 13, 2013 | not rated yet | 0
(HealthDay)—Sprawled out on the couch, reading the news on your iPad, you'd never think you could be putting yourself at risk. But you might be, if you happen to have an implanted heart device.
Cardiology May 09, 2013 | 5 / 5 (1) | 0
The stimulant drug methylphenidate "normalizes" activation of several brain areas in young patients with attention-deficit/hyperactivity disorder (ADHD), according to a review published in the May Harvard Review of Psychiatry. ...
Attention deficit disorders May 09, 2013 | 5 / 5 (2) | 0
Different brain areas are activated when we choose to suppress an emotion, compared to when we are instructed to inhibit an emotion, according a new study from the UCL Institute of Cognitive Neuroscience and Ghent University.
Psychology & Psychiatry May 09, 2013 | not rated yet | 0 |
(Medical Xpress)—People provided with a real-time readout of activity in specific regions of their brains can learn to control that activity and lessen their anxiety, according to new findings published ...
Psychology & Psychiatry May 09, 2013 | 5 / 5 (2) | 0
Imaging technique could help traumatic brain injury patients: Mapping technology used to predict long-term effects
(Medical Xpress)—A new application of an existing medical imaging technology could help predict long-term damage in patients with traumatic brain injury, according to a recent UC San Francisco study.
Neuroscience May 09, 2013 | not rated yet | 0
(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 | 3.2 / 5 (6) | 0 |
(Medical Xpress)—Watching TV commercials of people munching on hot, crispy French fries or sugar-laden cereal resonates more with teens than advertisements about cell phone plans or the latest car.
Neuroscience May 08, 2013 | not rated yet | 0
(Medical Xpress)—With a goal of helping patients with spinal cord injuries, Jason Gallivan and a team of researchers at Queen's University's Department of Psychology and Centre for Neuroscience Studies are probing deep ...
Neuroscience May 08, 2013 | not rated yet | 0
(HealthDay)—Nonelderly, older adults with lumbar spinal stenosis (LSS) have a higher prevalence of diabetes and hypertension than those without stenosis, according to a study published in the April 20 issue ...
Diabetes May 07, 2013 | not rated yet | 0
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
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