Rad units of measure

Absorbed Dose (D)

Amount of energy absorbed per unit mass of tissue

SI Unit for Absorbed Dose

Gy

Conventional Unit for Absorbed Dose

Rad

Equivalent Dose (EqD)

Dose regarding biologic damage of various types of radiation (Radiation weighting factor) (D) x Wr

SI Unit for Equivalent Dose

Sv

Conventional Unit for Equivalent Dose

Rem

Effective Dose (EfD)

Dose indicating the risk of cancer/genetic damage and is the product of EqD and tissue weighting factor (EqD x Wt)

SI Unit for Effective Dose

Sv

Conventional Dose for Effective Dose

Rem

Collective Effective Dose

Describes radiation exposure of a population of people exposed to low doses of different soures of radiation

Average EfD x # of persons

SI Unit for Collective Effective Dose

Person-Sv

Conventional Unit for Collective Effective Dose

Man-rem

1 rad = ? Gy

1/100 Gy

1 Gy = ? rad

100 rad

1 rem = ? Sv

1/100 Sv

1 Sv = ? rem

100 rem