Dose Equivalent (DE): The measure of the biological damage caused by radiation in human body tissue. It accounts for the differences in the types of radiation by using a different "quality factor" for each type of radiation. Dose Equivalent is reported in units of "rem" or "mrem".
Deep Dose Equivalent (DDE): External whole-body exposure is the dose equivalent at a tissue depth of 1 cm (1,000 mg/cm 2); whole body dose from radiation that has enough energy to penetrate deep into the body and deposit its energy anywhere in the body. This applies to external whole body exposure.
Shallow Dose Equivalent (SDE): The measure of the external exposure of the skin or an extremity, is taken as the dose equivalent at a tissue depth of 0.007 cm (7mg/cm 2) averaged over an area of one square centimeter.
Total Effective Dose Equivalent (TEDE): The total measure of exposure from both external and internal radiation.
