Word: scanners
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...invited him or her to participate. We acquired two photographs: one of the beloved and one of an emotionally neutral individual. Generally the latter was someone the subject had known casually in high school or college. Then we set a date to put each subject into the brain scanner...
...procedure was simple but not easy. First Mashek and I made the participant as comfortable as possible in the scanner--a large, horizontal, cylindrical, cream-colored plastic tube that is open at both ends and extends from above the head to about the waist. After taking preliminary scans to establish basic brain anatomy, the 12-min. experiment started. First the subject looked at the photograph of the beloved on the screen for 30 sec. as the scanner recorded blood flow in various brain regions. Next the subject was shown a large number and asked to count backward...
...McLean Hospital in Belmont, Mass., "and noticed that many came out of the MRI feeling much better than when they went in." A controlled study found that 23 of 30 bipolar subjects who had scans showed mood improvement. If larger studies confirm the effect, a tabletop version of the scanner could someday be used in doctors' offices...
...your large intestine, looking for abnormal growths that could lead to colon cancer--it's easy to see the appeal of the so-called virtual colonoscopy. The procedure is far less invasive: a small device blows air into the rectum to inflate the bowel while a C.T. scanner takes X rays. Unfortunately, the results from early virtual colonoscopies did not measure up. In some studies, they missed half the polyps that needed to be caught...
Available in November for $199, the ScanJet 4670 isn't the cheapest scanner in its class. Canon, Epson and even HP sell models with the same 2,400-dots-per-inch resolution and 48-bit color for $150 or less. But its breakthrough design makes it worth the splurge...