Dose Definitions

Question 1

Absorbed dose

Answer 1

A measure of the biologically significant effect produced by ionizing radiation

Units: Gy

Question 2

Given dose

Answer 2

Also called applied dose, maximum absorbed dose or peak absorbed dose

For fixed SSD techniques

Question 3

Exit dose

Answer 3

Absorbed dose delivered by a single fixed beam to the patient at the beam exit poin

Question 4

Output

Answer 4

Specified terms of absorbed dose rate in a patient at a given SSD for a specified field size and reference depth

Called peak absorbed dose rate
MADR

Question 5

Target dose

Answer 5

Dose prescribed at a point of interest

The absorbed dose at a point within the volume to be treated

Question 6

Integral dose

Answer 6

Summation of the dose to the entire irradiated area and represents the total energy absorbed in the body