Radiology & Imaging
Human images from world's first total-body scanner unveiled
EXPLORER, the world's first medical imaging scanner that can capture a 3-D picture of the whole human body at once, has produced its first scans.
Nov 19, 2018
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News tagged with radiation dose
Radiology & Imaging
Medical Physicists: CT Scans Safe
Mayo Clinic professor of radiological physics Cynthia McCollough calls last fall's news from Cedars-Sinai Medical Center the straw that broke the camel's back for the CT scan community, at least when it comes to public perception.
May 4, 2010
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Oncology & Cancer
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.
Jun 4, 2012
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Oncology & Cancer
Risk of cancer death after exposure to low-dose ionizing radiation underestimated, suggests nuclear industry study
Prolonged exposure to low-dose ionizing radiation is associated with a higher risk of death from cancer than previously thought, suggests research tracking the deaths of workers in the nuclear industry, published in The BMJ.
Aug 16, 2023
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Oncology & Cancer
Antibody is effective against radiation-induced pulmonary fibrosis
Radiation therapy is part of the treatment regimen for about two thirds of cancer patients today. Radiotherapy is well tolerated in most cases, but it can also lead to damage in healthy tissues that are also irradiated. One ...
Mar 31, 2017
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Oncology & Cancer
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 of 3D diagnostic ...
Oct 22, 2012
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Oncology & Cancer
Radiation doses from CT scans should be more consistent, say experts
Large differences in radiation doses used for CT scans are mainly due to how the scanners are used by medical staff rather than differences in the patients scanned or the machines used, finds a study in The BMJ today.
Jan 3, 2019
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93
Oncology & Cancer
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 human breast cells, ...
Dec 20, 2011
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Oncology & Cancer
Cancer patients can now use skin creams during radiation therapy
Contrary to the advice most cancer patients receive when they go through radiation treatment, topical skin treatments, unless applied very heavily, do not increase the radiation dose to the skin and can be used in moderation ...
Oct 18, 2018
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Oncology & Cancer
Total-body PET: Maximizing sensitivity for clinical research and patient care
The new total-body PET/CT scanner could revolutionize our understanding and treatment of disease through analysis of better imaging data from the whole body. In The Journal of Nuclear Medicine (JNM) featured January article, ...
Jan 3, 2018
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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.
This text uses material from Wikipedia, licensed under CC BY-SA
