Word: positronic
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...indicative of dementia and Alzheimer's disease, but not all of them exhibit the memory loss and confusion that typically characterize these disorders. In fact, the number of such patients may be greater than researchers first thought. In a November 2008 study, a team of scientists used a new positron emission tomography (PET) brain-imaging technique developed by Drs. William Klunk and Chester Mathis of the University of Pittsburgh to image the brains of live patients - a leap forward in a field that long had to rely on postmortem analyses of brain tissue to confirm diagnoses after the fact...
...mediated transformations with the hope of having “an immediate impact on human health.” He explains, “There are certain problems in medical areas that may have their solutions in chemistry. One example of that is a very powerful imaging technology, PET. Positron emission tomography.” The technology is limited at a chemical level, creating a boundary for hospitals, and Ritter’s goal is to overcome this through scientific research. Ritter may be better known, though, for his status as one of the Department’s hottest professors...
...sense, scientists have known this for years. While scanning patients with positron emission tomography (PET), an imaging technique often used on cancer patients to detect the spread of tumors, scientists have long noted the excess activity of brown-fat cells in their images. They just didn't realize what they were looking...
...researchers thus recruited a small sample group of 10 men, ages 23 to 46; some of them got a placebo, while others took either 200 mg or 400 mg (typical therapeutic doses) of modafinil. All of the men's brains were then scanned using positron-emission tomography (PET scans). Volkow and Fowler were looking for dopamine activity - not just for overall dopamine levels, but also for the behavior of dopamine transporters...
...psychiatry at Vanderbilt, studied whether the brains of those thrill seekers differed in any way from those of the less adventuresome when it comes to dopamine. He gave 34 men and women a questionnaire to assess their novelty-seeking tendencies, then scanned their brains using a technique called positron emission tomography to figure out how many dopamine receptors the participants had. Zald and his team were on the lookout for a particular dopamine-regulating receptor, which monitors levels of the neurotransmitter and signals brain cells to stop churning it out when there's enough...