News tagged with radiation dose

Related topics: radiation exposure · ct scan · ionizing radiation · radiation · radiation oncology

Enzyme key to triggering anti-cancer immune response

An enzyme implicated in autoimmune diseases and viral infections also regulates radiation therapy's ability to trigger an immune response against cancer, Weill Cornell Medicine scientists found in a new study. Their discovery ...

Jun 27, 2017
popularity131 comments 0

Dual-agent PET/MR with time of flight detects more cancer

Simultaneous injections of the radiopharmaceuticals fluorine-18 fluorodeoxyglucose (18F-FDG) and 18F-sodium fluoride (18F-NaF) followed by quantitative scanning significantly improves image quality and detection of bone metastases ...

Jun 14, 2017
popularity0 comments 0

Quest for balance in radiation leads to lower doses

A new study led by UC San Francisco has found that radiation doses can be safely and effectively reduced - and more consistently administered - for common CT scans by assessing and comparing doses across hospitals, and then ...

Apr 10, 2017
popularity0 comments 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.

This text uses material from Wikipedia, licensed under CC BY-SA

Subscribe to rss feed