Description

The effective dose equivalent (EDE) for a radiation exposure can be calculated based on the its amount and distribution.


Parameters:

(1) radiation dose equivalent at each organ in milliSieverts (mSv)

(2) organ dose weighting factor

 

Organ

Weighting Factor

gonads

0.20 (0.08 - 0.25)

breasts

0.05 (0.05 - 0.15)

active (red) bone marrow

0.12

lung

0.12

colon

0.12

stomach

0.12

thyroid

0.05 (0.03 - 0.05)

bladder

0.05

liver

0.05

esophagus

0.05

skin

0.01

bone surfaces

0.01 (0.01 - 0.03)

remainder

0.05

 

The sum of the weighting factors equals 1 (whole body exposure).

 

total effective dose equivalent =

= SUM((radiation dose equivalent for organ) * (weighting factor for organ))

 

Acute radiation sickness may follow an acute exposure of 250 mSv (0.25 Sv, 25 rem) and usually follows doses of 1,000 mSv (1 Sv).


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