(DD) The doubling dose is the dose required to double the effect, assuming a linear dose response.

The external dose is the dose equivalent received from radiation sources outside the body.

(LDR) The low dose rate is used in brachytherapy to estimate the use of sealed sources placed in a patient on a permanent or temporary basis to achieve the therapeutic dose of radiation.

The collective dose is the sum of individual doses. Collective doses are received in a given period of time by a specific population and a specific radiation exposure.

The annual dose limit is the maximum dose that may be received in a calendar year.