Researchers have found that Medicare payments for non-invasive medical imaging, including magnetic resonance imaging (MRI) and computed tomography (CT) scans, are now higher to non-radiologists than to radiologists, according to a study in the Janua…
WASHINGTON, D.C., November 21, 2010 — Magnetic resonance imaging (MRI), a medical imaging technology used to image organs and soft tissues, may hold the key to improving the efficiency of jet engines, according to Lt. Colonel Michael Benson, a Ph.D….
“Please hold absolutely still”: This instruction is crucial for patients being examined by magnetic resonance imaging (MRI). It is the only way to obtain clear images for diagnosis. Up to now, it was therefore almost impossible to image moving …
A team of American scientists claim that a new method of testing for neurological diseases could provide doctors with a rapid and non-invasively method of diagnosing degenerative disorders. The research, published in The journal of Comparative Neuro…
Age-related changes in the brain — the appearance, starting around age 60, of “white-matter lesions” among the brain’s message-carrying axons — significantly affect cognitive function in old age. White-matter lesions are small bright patches that show up on magnetic resonance imaging (MRI) of the brain. What’s more, hypertension may account for some of this cognitive impact. A full report on these relationships appears in the March issue of Psychology and Aging, which is published by the American Psychological Association (APA).
UCLA and University of Queensland (Australia) neuroscientists using a powerful new imaging analysis technique have created the first three-dimensional video maps showing how Alzheimer’s disease systematically engulfs the brains of living patients. The findings appear in the Feb. 1 edition of the peer-reviewed Journal of Neuroscience. The dramatic time-lapse videos show the sequential destruction of brain areas that control memory function, then emotion and inhibition, and finally sensation. They also show how the disease spares small brain regions that control vision and other functions that remain intact in Alzheimer’s patients
Nicotine administration in humans is known to sharpen attention and to slightly enhance memory. Now scientists, using functional magnetic resonance imaging (MRI), have identified those areas of the brain where nicotine exerts its effects on cognitive skills. Their findings suggest that nicotine improves attention in smokers by enhancing activation in the posterior cortical and subcortical regions of the brain–areas traditionally associated with visual attention, arousal, and motor activation. This study provides the first evidence that nicotine-induced enhancement of parietal cortex activation is associated with improved attention.
Researchers have shown that magnetic resonance imaging (MRI) can predict the risk of heart attacks or cardiac deaths in coronary heart disease patients, according to a report in today?s rapid access issue of Circulation: Journal of the American Heart Association.