Everybody is aware of the radiation risk Japan faces from its damaged nuclear powered electricity generators.
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Throughout this long journey I have struggled to understand the nature of radiation risk.
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In 2011, Brenner explained these two ways of examining radiation risk in an essay in The Bulletin of the Atomic Scientists.
There have been previous efforts to gauge the radiation risk for future Mars travelers, but the best estimate is coming from NASA's Curiosity mission.
Along the way the astronauts would be bombarded by cosmic radiation and risk being baked by unpredictable solar flares.
Similarly, Mary Helen Barcellos-Hoff, a professor of radiation oncology and cell biology at NYU and her team lost mouse populations involved in studies of how radiation exposure increases cancer risk as well as how radiation can be targeted to treat tumors.
Japanese Prime Minister Naoto Kan advised residents living within 30 km (18.6 miles) to stay indoors or risk radiation sickness.
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Earlier in the day Hitoshi had driven north to the crippled Fukushima Nuclear Power Station, where the reactors are feared to be leaking radiation and at risk of an outright meltdown.
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"We did find that women who lived in the South and areas of high solar radiation have reduced risk of breast cancer, " said John, who is based at the Northern California Cancer Center in Union City, California.
The individual health risk from radiation exposure at Fukushima is very small, he contends, no higher than the risk of death from violent crime in Japan.
In fact, the government rarely acknowledged public risk from radiation released at any of its weapons facilities around the country.
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But the reality seems to be that the risk from radiation is far less scary than most people think it would be.
Recent studies by researchers at Massachusetts General make the case that the risks of death from a current medical condition often far outweigh the risk of radiation.
In fact, while the low-risk patients might not receive any benefit from the test, there is at least some risk from radiation--which is higher for a CT angiogram than a traditional X-ray.
Residents of Fukushima who are concerned that residual radiation will cause additional risk can avoid that by leaving, but they need to recognize that any additional cancers will be statistically unobservable, hidden well below those of natural cancer and the other dangers of modern life.
Another study from the May issue of Radiology found that among patients ages 18 to 35 undergoing chest CTs and abdominal CTs for cancer, trauma and abdominal pain, the short-term risk of dying from an underlying condition was 7.1% and 3.9%, respectively, compared with long-term risk from radiation-induced cancer of 0.1%.
Ironically, because past research studying the after-effects of exposure to things like atom bombs and radiation treatments for cancer suggests the most important environmental risk factor for meningiomas is ionising radiation.
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This necessitates costly safeguards to mitigate the risk of a radiation release due to accidents, natural disasters, theft or terrorism.
What is more, caesium particles tend to lurk in the grass, which means radiation is more of a risk at toddler height than for adults.
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Many communities across Northern Ireland have campaigned against phone masts over fears that low level radiation could pose a health risk to people living near the ariels.
Many communities across Northern Ireland have campaigned against phone masts over fears that low level radiation could pose a health risk to people living near the installations.
When cardiac CT angiography is being used appropriately -- meaning, for example, in people with chest pain suggesting blocked heart arteries, rather than as a screening test for people with no symptoms of heart disease -- the benefits far outweigh the risk of the radiation, according to Einstein and Hausleiter.
Although concern is understandable, the problems in Japan do not mean that we are at a higher risk for exposure to radiation.
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However we need to be aware of remaining concerns, for example risk of stroke and radiation exposure, especially during the learning curve.
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He also said the bunker was subject to regular inspection, never leaked radiation, and never posed any risk to the neighborhood of radioactive exposure.
The possible health risk of cell phone radiation is a hot-button topic for many people, and this controversy is definitely not just about science.
This instrument monitors high-energy radiation considered to be a health risk to astronauts and a factor in whether microbes could survive on Mars' surface.
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Modelling based on experience with previous plants suggests that the risk of a significant radiation leak from generation I reactors was between one in 1, 000 and one in 10, 000 per reactor year.
In specific reply to your assertion the author of this piece did not offer any evidence refuting the LNT hypothesis, I disagree, he specifically cited factual, observed experience of no increased cancer risk in areas where normal and persistent background radiation levels are well above levels the LNT hypothesis would assert must have statistically significant higher cancer risk.
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