Machine learning uses lung cancer scans to predict heart damage

As patients with lung cancer live longer, the risk of long-term cardiac side effects of radiation therapy has been increasing, despite advances that reduce the radiation dose to the heart. New research uses machine learning ...

Oncology & Cancer

Study supports precision radiation therapy in lung cancer

Results from a new study led by researchers at The University of Texas MD Anderson Cancer Center support standard use of the more precise intensity-modulated radiotherapy (IMRT) over the alternative 3D-conformal radiotherapy ...

Oncology & Cancer

Novel technique has potential to transform breast cancer detection

An innovative breast imaging technique provides high sensitivity for detecting cancer while significantly reducing the likelihood of false positive results, according to a study published in Radiology: Imaging Cancer. Researchers ...

page 1 from 32

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