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Radiology

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CLAIM: Infrared thermometers, which are held near the forehead to scan body temperature without direct contact, point an infrared light directly at the brain’s pineal gland, exposing it to harmful radiation.

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Q: My doctor ordered an abdominal ultrasound as part of my routine checkup. I was surprised to learn I have a 3.7 centimeter abdominal aneurysm. I suspect your doctor ordered the test because she or he was following the United States Preventive Services Task Force guidelines.

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DEAR MAYO CLINIC: My father just started chemotherapy for lymphoma, and he is scheduled for a positron emission tomography or PET scan after his first three treatments. How do doctors decide when to perform a PET scan, and what's the purpose of doing that scan during the treatment? Why wouldn't the test be done before treatment started?

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LIBBY — The bleak world of asbestos science is tinged with subtle hues of gray and white, barely perceptible shadows that don't strike the untrained eye as anything abnormal. But for those whose lives and careers are defined by the hundreds of people sick and dying in this tiny mountain community, the reality of the human tragedy that's been unfolding here for decades is crystal clear.

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Heat can be an incredibly simple, yet powerful, way to boost the effects of chemotherapy and radiation treatments for cancer. More than 5,000 years ago, doctors in ancient Egypt used heat to treat cancer. Today, cancer experts have refined the delivery of heat-- a technique called hyperthermia-- to improve...

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