Occupational Exposure Limits/Permissibles

Adults 18 and over

5,000 Millirems per year (Deep Dose Equivalent-DDE)

1250 Millirems per quarter

420 Millirems per month

15,000 Millirems per year (Lens of Eye Dose Equivalent-LDE)

50,000 Millirems per year (Shallow Dose Equivalent-SDE)

Extremity Badges
(Ring and Wrist)

50,000 Millirems per year

12,500 Millirems per quarter

4,200 Millirems per month

Children under 18

10% of Adult dose

500 Millirems per year

125 Millirems per quarter

50 Millirems per month

Baby Monitor

500 Millirems per entire 9-month gestation period

50 Millirems per month

Badge should be worn in abdominal area behind lead apron

DDE (Deep Dose Equivalent)-(Hd), that applies to external whole body exposure. The dose equivalent at a tissue depth of 1 centimeter (cm) (1,000 milligrams per square centimeter)(mg/cm2).

LDE (Lens Dose Equivalent)- the external dose equivalent to the lens of the eye at a tissue depth of 0.3 cm (300mg/cm2).

SDE (Shallow Dose Equivalent)-(Hs), that applies to the external exposure of the skin or an extremity. The dose equivalent at a tissue depth of 0.007 cm (7mg/cm2) averaged over an area of 1 square centimeter (cm2).