Word: positrons
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...signals also tell the neurons that any memories recorded in the next few minutes need to be especially robust. One piece of evidence for this scenario: Lawrence Cahill, a colleague of McGaugh's at Irvine, showed subjects emotionally arousing film clips, simultaneously gauging the activity of their amygdalae using positron-emission tomography (PET) scans. Three weeks later, he gave the subjects a surprise memory quiz. The amount of amygdala activity predicted with great accuracy how well they remembered the film clips...
...doctor?s lounge, I asked him "what's going on?" We talked about tests. It had to be his brain. His wise head therefore ordered itself shot through with x-rays, ultrasonic waves, magnet fields of strength found only around spinning stars, radio waves, injections of iodine, gadolinium, positron-emitting glucose. Many other brains were wracked for the sake of his; neurologists, neuroradiologists, infectious disease specialists. Tens of thousands of dollars of tests. No diagnosis...
...Randall was dealing with another problem before she considered the hierarchy problem: examining supersymmetry, a theory that claims every fundamental particle has a partner (like an electron with a negative charge and a positron with an equivalent positive charge...
...future, however, may belong to whoever can figure out how to make all these imaging technologies work together. One approach combines the anatomical accuracy of CT imaging with the functional information provided by a type of nuclear scan called positron-emission tomography (PET). Still in its early days in the clinic, PET/CT could help doctors see how much of the cardiac muscle is still alive after a heart attack and whether a bypass operation, balloon angioplasty or stent surgery would help damaged areas recover...
...addition, Gabrielse’s team was able to measure the distance between the positron and antiproton in an antihydrogen atom by the magnitude of the voltage required to pull the two particles apart, enabling them to better map the internal structure of the atom...