News tagged with radiation

Related topics: radiation therapy , chemotherapy , radiation oncology , cancer , nuclear power plant

Ascertaining low-dose radiation impact on the heart

We are all exposed to radiations. Such exposure can be harmless at very low doses but damage our health above certain thresholds. But what happens in between is more difficult to predict. The PROCARDIO project is casting ...

Jul 25, 2014
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Backscatter body scan redux

Airline passengers have already said bon voyage to the controversial backscatter x-ray security scanners, pulled from U.S. airports in 2013 over concerns about privacy and potential radiation risks. But the ...

Jul 22, 2014
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Cancer risks increase with complex heart tests

Complex heart imaging can increase cancer risks for children throughout their lifetime, according to a new study co-authored by Le Bonheur Cardiologist Jason Johnson, MD, MHS. The study, which appears in the June 9, 2014 ...

Jun 24, 2014
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Radiation

In physics, radiation describes any process in which energy emitted by one body travels through a medium or through space, ultimately to be absorbed by another body. Non-physicists often associate the word with ionizing radiation (e.g., as occurring in nuclear weapons, nuclear reactors, and radioactive substances), but it can also refer to electromagnetic radiation (i.e., radio waves, infrared light, visible light, ultraviolet light, and X-rays) which can also be ionizing radiation, to acoustic radiation, or to other more obscure processes. What makes it radiation is that the energy radiates (i.e., it travels outward in straight lines in all directions) from the source. This geometry naturally leads to a system of measurements and physical units that are equally applicable to all types of radiation.

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