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Medical experts told lawmakers Wednesday that new television advertisements for medical devices pose even greater risks to patients than ads for drugs, which have been scrutinized for years.
The Sena

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American and Canadian researchers have found that hospitals that practice drug and device studies could be better at dealing with life-threatening situations and they have lower patient death rates than hospitals that don’t do clinical trials. There was another study done that found that ovarian cancer patients at these types of hospitals have a 28 percent lower mortality rate.

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Ordinary visible light is scattered by haze but infrared(IR) radiation can penetrate through the haze without being scattered.Therefore,these can be used as signals on distant objects obscured by atmospheric haze.Also,IR radiation enables sharpshooters to see their targets in total darkness.These devices essentially consist of an IR lamp which sends a beam of IR radiation (called black light) and a telescope receiver which picks up returned radiation from the object and converts it to a visible image.

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