Word: scanners
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...pioneer new techniques in brain surgery. Last May he faced an unusual challenge: a six-year-old girl suffering epileptic seizures so severe and unremitting that they could be relieved only by removal of part of her brain. First her brain was mapped by a positron-emission tomography scanner, a machine invented at ucla; then those readings were matched against others provided by a more conventional mri scan...
Using an MRI scanner, Hanna Damasio has examined the living brains of hundreds of patients, and she and her husband have identified regions they think may serve as convergence zones in the brain's left hemisphere. An area in the temporal lobe pulls together information about the names of objects, animals and people, for instance, while another area in the frontal cortex appears to act as the nexus for verbs. Yet a third oversees the task of assembling nouns and verbs into sentences...
...psychiatrist, the study focused on a small group of middle-aged volunteers, all of whom had relatives with Alzheimer's and who complained of mild memory problems themselves. First the researchers drew blood samples to test for the presence of the Apo-E4 gene. Then they used a PET scanner (positron emission tomography) to record each patient's pattern of brain activity. After a computer sifted through the data, a striking correlation emerged. A group of 12 individuals who had inherited Apo-E4 showed diminished activity, particularly in the parietal region of the brain--a region that is dramatically impaired...
...Ford's urging, the Pentagon's Defense Intelligence Agency provided Schweitzer with the optical scanner. One of its case officers gave him a hurry-up course in spy craft: Schweitzer learned emergency codes and signals and roamed northern Virginia shopping malls, practicing how to shake off a tail and how to retrieve messages from dead drops. Cover stories were rehearsed in case he was compromised...
...Saturday morning in April 1992, Theodore G. Schweitzer powered up his optical scanning machine in a corner room of Hanoi's Central Military Museum. Vietnamese officials had approved his use of the scanner to copy documents for a book he was writing on the museum's war archives. Schweitzer had convinced them that he was a private American researcher, which was part of the truth. The part he left out was that he was also working for U.S. intelligence...