Sentences with phrase «ionizing radiation dose»

As I understand things (and this is NOT my field at all) there is a robust dispute over how sure we can be about what ionizing radiation dose to human health at small doses.

Radiation Dose Chart — this is a very informative chart of the ionizing radiation dose a person can absorb from various sources in relation to direct exposure.

«There is a need for consensus recommendations for ionizing radiation dose optimization and a regulation of dose metrics across imaging procedures,» said lead author Kevin D. Hill, MD, Division of Pediatric Cardiology, Duke University Medical Center.

There is general recognition that procedural ionizing radiation doses should be kept as low as reasonably achievable.

Here's a chart (click to enlarge) comparing ionizing radiation doses from a host of different activities and sources, ranging from eating a banana to living in Denver:

Not exact matches

The detector developed at UNH, known as DoSEN, short for Dose Spectra from Energetic Particles and Neutrons, measures and calculates the absorbed dose in matter and tissue resulting from the exposure to indirect and direct ionizing radiation, which can change cells at the atomic level and lead to irreparable damDose Spectra from Energetic Particles and Neutrons, measures and calculates the absorbed dose in matter and tissue resulting from the exposure to indirect and direct ionizing radiation, which can change cells at the atomic level and lead to irreparable damdose in matter and tissue resulting from the exposure to indirect and direct ionizing radiation, which can change cells at the atomic level and lead to irreparable damage.

At one extreme, the scientists estimated fly ash radiation in individuals» bones at around 18 millirems (thousandths of a rem, a unit for measuring doses of ionizing radiation) a year.

There is no known way to prevent most types of leukemia, though some types may be prevented by avoiding high doses of ionizing radiation, exposure to the chemical benzene, smoking and certain types of chemotherapy.

For instance, Chumak and his colleagues developed a way to estimate doses people received by analyzing tooth enamel for effects of ionizing radiation.

The results will be used to accurately calculate the damage and radiation dose delivered to patients in radiotherapy, when cancer cells are bombarded with ionizing radiation.

Biophysical studies have shown that the damage arising to cells from an exposure to ionizing radiation declines in a linearly manner with decreasing dose, with some damage still occurring even at the lowest doses.

The gauntlet Juno ran at Jupiter held many chances for catastrophe: The spacecraft might have been knocked out by intense magnetic fields (at that distance, 20 times stronger than Earth's), ionizing radiation (a total dose of 265 rads — more than enough to kill a human being), dust particles from Jupiter's rings (from which the main engine was completely unshielded) or loss of power if the solar arrays were unable to reorient to the sun.

While these imaging procedures, including fluoroscopically guided procedures such as cardiac catheterization, computed tomography scans, and nuclear medicine studies, are critical for accurate diagnosis and intervention, ionizing radiation in high doses can be harmful.

Considerable previous research in cell cultures has demonstrated that low doses of ionizing radiation results in «bystander» effects, in which nearby, unexposed tissues suffer cell death, mutations, and tumor - inducing growth (ScienceNOW, 7 September 2005).

The current model for predicting cancer risk from ionizing radiation holds that risk is directly proportional to dose.

Ionizing radiation is a potent DNA damaging agent that interacts with cellular DNA and induces lesions in the irradiated cells and prevents cell proliferation and induces cell death by apoptosis or necrosis depending on the radiation dose.

Exposure of tumor cells to clinically relevant low doses of ionizing radiation causes DNA damage and the generation of reactive oxygen species (ROS).

The first of this week's review articles from the lab of Umberto Galderisi (Campania University, Naples, Italy) discusses the effects of low dose ionizing radiation (LDIR) on the biology of stem cell compartments.

«The committee concludes that current scientific evidence is consistent with the hypothesis that there is a linear, no - threshold dose - response relationship between exposure to ionizing radiation and the development of cancer in humans.»

The BEIR VII or seventh Biological Effects of Ionizing Radiation report on «Health Risks from Exposure to Low Levels of Ionizing Radiation» reconfirmed the previous knowledge that there is no safe level of exposure to radiation — that even very low doses can cause cancer.

E.g., when trying to explain to someone how microwave «radiation» is an unlikely candidate for causing cancer, I might say that it's rather well understood how low doses of ionizing radiation can cause cancer, and the key part is not «radiation» (which microwaves are) but «ionizing» (which microwaves are not).