News tagged with radiation dose
Small increase in cancer risk following CT scans in childhood and adolescence
Study leader, Professor John Mathews from the University of Melbourne said this small increase in cancer risk must be weighed against the undoubted benefits from CT scans in diagnosing and monitoring disease.
Cancer
20 hours ago |
not rated yet |
0
Researchers provide prospective on low-dose radiation biology controversy
A review of the current issues in low-dose radiation research authored by two radiation biologists from the Pacific Northwest National Laboratory is the cover story of the May 2013 issue of Radiation Research. The re ...
Cancer
May 14, 2013 |
not rated yet |
0
New X-ray breast cancer imaging possible with 25 times reduced 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
|
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
|
New take on impacts of low dose radiation
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
|
Two genetic variations predict second cancers after radiation for children with Hodgkin's lymphoma
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
|
Mathematical models out-perform doctors in predicting cancer patients' responses to treatment
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
|
After chest radiation, girls at greater risk for early breast cancer: study
(HealthDay) -- Girls who receive radiation to the chest to treat childhood cancer, even those getting lower doses, have a high risk of developing breast cancer at a young age, according to a new study.
Cancer
Jun 04, 2012 |
not rated yet |
0
New therapy holds promise for aggressive breast cancers
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
Hepatic function testing can assist in treatment planning for liver cancer patients
Monitoring the hepatic function of unresectable liver cancer patients, measured by 99mTc-labeled iminodiacetic acid (HIDA) via single-photon emission computed tomography (SPECT) prior to and during radiation therapy, provides ...
Cancer
Feb 08, 2013 |
not rated yet |
0
Cardiologists dramatically cut patient radiation exposure from X-rays
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
|
Neurocognitive deficits seen in survivors of pediatric Hodgkin's
(HealthDay)—Adult long-term survivors of childhood Hodgkin's lymphoma are at risk for neurocognitive impairment, according to research published online Sept. 4 in the Journal of Clinical Oncology.
Cancer
Sep 10, 2012 |
5 / 5 (1) |
0
Chernobyl cleanup workers had significantly increased risk of leukemia
A 20-year study following 110,645 workers who helped clean up after the 1986 Chernobyl nuclear power plant accident in the former Soviet territory of Ukraine shows that the workers share a significant increased risk of developing ...
Cancer
Nov 08, 2012 |
not rated yet |
0
Gamma rays in background radiation linked to childhood leukaemia
(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
|
Multiple cone-beam scans fall within acceptable ranges
(HealthDay)—The radiation dose imparted to patients undergoing multiple intraoperative lumbar single cone-beam computed tomography (CT) scans is within the dose range that patients receive during a single ...
Diseases, Conditions, Syndromes
Mar 14, 2013 |
not rated yet |
0
Absorbed dose
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
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
