Digital Radiography. The wide dynamic range and linear response of the typical digital receptor is like a "two-edged sword".
The advantage is that a wide range of exposures, and exposure errors, will still produce good image contrast. Stochastic Effects. Stochastic Effects Stochastic effects are those that occur by chance and consist primarily of cancer and genetic effects.
Stochastic effects often show up years after exposure. As the dose to an individual increases, the probability that cancer or a genetic effect will occur also increases. However, at no time, even for high doses, is it certain that cancer or genetic damage will result. Similarly, for stochastic effects, there is no threshold dose below which it is relatively certain that an adverse effect cannot occur. While it cannot be determined conclusively, it often possible to estimate the probability that radiation exposure will cause a stochastic effect. Low Dose Radiation Program: Radiation Biology and the Radiation Research Program. The Department of Energy (DOE) and its predecessor organizations, Energy Research and Development Agency (ERDA) and Atomic Energy Commission (AEC), always have been concerned about the health effects of ionizing radiation.
Extensive research has been conducted under their sponsorship at all levels of biological organization from molecules to man. Over the past 60 years, studies using every type of radiation source have included exposure to both external radiation sources and to internally deposited radioactive materials. These exposures used different dose patterns and distributions delivered over a wide range of experimental times.
This extensive research provided the basis for the new Low Dose Radiation Research Program, linking the program directly to both the study of radiation's health effects and recent developments in life sciences and technology. Atomic Energy The history of atomic energy has been reviewed extensively by the U.S. Radiation Protection Basics. Radiation Protection Basics.
Radiation sickness: MedlinePlus Medical Encyclopedia. Radiation sickness is illness and symptoms resulting from excessive exposure to ionizing radiation.
There are two basic types of radiation: ionizing and nonionizing. Nonionizing radiation comes in the form of light, radio waves, microwaves and radar. This kind of radiation usually does not cause tissue damage.Ionizing radiation is radiation that produces immediate chemical effects on human tissue . X-rays, gamma rays, and particle bombardment (neutron beam, electron beam, protons, mesons, and others) give off ionizing radiation. Radiation Information and Answers. We are not dying from radiation exposure as some would lead us to believe.
We need to question what we read and hear. When we read that someone died or has cancer and it is “suspected” or “assumed” to be from the person using a cell phone, receiving a chest x ray, or living in a state with a nuclear power plant, we simply cannot believe this information at face value. We have made it too easy to blame something with no evidence to support the claim. We want to be able to blame something when a loved one gets sick. Acute radiation syndrome.
How much can you over-radiate and still get a perfect image? Without a phantom it is almost impossible to see how easy it is to over-radiate a patient and still have a perfect (or at least very passable) image.
I have now been able to use my skull phantom on nine different manufacturers to discover how much mAs can be used (over-used) before the image is unusable. Currently I have four CR and five DR vendors. In my two-eight hour presentations I use five to eight lateral skull images for each vendor. As scrolling through the images on this page is a bit cumbersome, I have put the four most important images from each vendor together as a 4 on 1. Radiation Information and Radiation Safety Blog. List of "Ask the Experts" Questions and Answers. Radiation Leak in New Mexico: "We've never seen a level like we are seeing" A nuclear waste facility near Carlsbad, New Mexico is the site of an airborne radiation leak.
The high levels of particles were detected late Friday night at the Waste Isolation Pilot Plant. WIPP is housed at an old salt mine, and toxic waste like plutonium is housed half a mile underground. All of the 139 workers were sequestered on site. WIPP is the nation's first transuranic nuclear waste repository, used to permanently dispose of low-level nuclear waste from government sites around the nation. Four Sites Where You Can Monitor U.S. Radiation Levels. The dead trees and fallen leaves near Chernobyl aren’t decaying. It’s been nearly 30 years since the catastrophe at Chernobyl, and as the cleanup grinds on, the far-reaching effects continue to be documented.
Birds with smaller brains, increasing spiders, decreasing butterflies, all these and more have been reported from the areas surrounding Chernobyl. One group you don’t hear very much about are the decomposers -- those bugs, microbes, fungi, and slime molds who nourish themselves by consuming the remains of dead organisms. Without these recyclers, carbon, nitrogen, and other elements essential to life would be locked in plant corpses. The effects of radioactive contamination on the decay of plant material remains unknown… until now.
Scientists examining the forests around Chernobyl have found that radioactive contamination has reduced the rate of litter mass loss. To test this, the team filled 572 small mesh bags with dry leaves from four species of trees -- oak, maple, birch, pine -- collected from uncontaminated sites. This Is What The World Would Look Like If Cell Phone Radiation Was Visible. It shocks many people to discover that less than 1 percent of the electromagnetic spectrum is visible to the human eye.
Think about that for a moment. Take the rainbow for example, the existence of the rainbow depends on the conical photoreceptors in your eyes; to animals without cones, the rainbow does not exist. Time lapse map of every nuclear explosion ever on Earth.