News tagged with radiation dose
Scientists have developed a way to produce three-dimensional X-ray images of the breast at a radiation dose that is lower than the 2D radiographies used in clinics today. The new method enables the production ...
Cancer Oct 22, 2012 | 5 / 5 (2) | 0 |
Mathematical prediction models are better than doctors at predicting the outcomes and responses of lung cancer patients to treatment, according to new research presented today (Saturday) at the 2nd Forum of the European Society ...
Cancer Apr 20, 2013 | 4 / 5 (1) | 0 |
Women treated with radiation for breast cancer are more likely to develop heart problems later, even with the lower doses used today, new research suggests. The risk comes from any amount of radiation, starts ...
Cardiology Mar 13, 2013 | not rated yet | 0
heralded for its low complication rates—actually results in more complications than whole-breast radiation one year after treatment, Yale School of Medicine researchers report in the October issue of the Journal of Clinical On ...
Cancer Oct 22, 2012 | not rated yet | 0 |
Research could lead to new ways to ID women who have higher risk of breast cancer from low-dose radiation
(Medical Xpress)—Scientists from the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) have identified tissue mechanisms that may influence a woman's susceptibility or resistance ...
Cancer Oct 16, 2012 | not rated yet | 0 |
Each year, hundreds of thousands of X-rays are performed across the country to help detect and treat common cardiovascular conditions such as coronary artery disease, valve disease and other heart problems. However, concern ...
Cardiology Aug 20, 2012 | not rated yet | 0 |
A recent Phase I/II clinical trial has shown that a new combination of radiation therapies developed at Virginia Commonwealth University Massey Cancer Center escalates radiation doses to safely and effectively treat prostate ...
Cancer Jun 26, 2012 | not rated yet | 0 |
(Medical Xpress) -- A small but statistically significant link between risk of childhood leukaemia and the gamma rays we are all exposed to from our natural environment has been detected in a very large study ...
Cancer Jun 12, 2012 | not rated yet | 0 |
Most medical imaging equipment is not designed with overweight and obese patients in mind. As a result, these individuals can be exposed to higher levels of radiation during routine X-ray and CT scans.
Medical research Apr 05, 2012 | not rated yet | 0
Researchers with the U.S. Department of Energy (DOE)'s Lawrence Berkeley National Laboratory (Berkeley Lab), through a combination of time-lapse live imaging and mathematical modeling of a special line of ...
Cancer Dec 20, 2011 | 4.5 / 5 (11) | 4 |
New research casts doubt on a popular treatment for breast cancer: A week of radiation to part of the breast instead of longer treatment to all of it.
Cancer Dec 06, 2011 | not rated yet | 0
Flax has been part of human history for well over 30,000 years, used for weaving cloth, feeding people and animals, and even making paint. Now, researchers from the Perelman School of Medicine at the University of Pennsylvania ...
Cancer Aug 09, 2011 | not rated yet | 0 |
A genome-wide association study published in the August issue of Nature Medicine has found two tiny genetic variations that can predict which patients with Hodgkin's lymphoma are most likely to develop radiat ...
Cancer Jul 24, 2011 | 5 / 5 (1) | 0 |
MDCT arthrography is better than MR arthrography for diagnosing glenoid rim osseous lesions, lesions that have been identified as potential causes of recurrence after shoulder surgery, according to a new study.
Other May 04, 2011 | not rated yet | 0
Australian researchers have developed a new therapy to treat a common and aggressive form of breast cancer and stop the disease spreading, with a 100% success rate reported in mice.
Cancer Apr 16, 2013 | 5 / 5 (1) | 0
Absorbed dose (also known as total ionizing dose, TID) is a measure of the energy deposited in a medium by ionizing radiation. It is equal to the energy deposited per unit mass of medium, and so has the unit J/kg, which is given the special name Gray (Gy).
Note that the absorbed dose is not a good indicator of the likely biological effect. 1 Gy of alpha radiation would be much more biologically damaging than 1 Gy of photon radiation for example. Appropriate weighting factors can be applied reflecting the different relative biological effects to find the equivalent dose.
The risk of stochastic effects due to radiation exposure can be quantified using the effective dose, which is a weighted average of the equivalent dose to each organ depending upon its radiosensitivity.
When ionising radiation is used to treat cancer, the doctor will usually prescribe the radiotherapy treatment in Gy. When risk from ionising radiation is being discussed, a related unit, the sievert is used.
For more information about Absorbed dose, read the full article at
This text uses material from Wikipedia and is available under the GNU Free Documentation License.