Re: Weighting Factor for Hot Particle Skin Doses (terminology correction)

["Sandy Perle" <sandyfl@EARTHLINK.NET>]

In my haste, I mixed up the units. This is the correct definitions:



Deep dose equivalent (Hd), which applies to the external whole-body 

exposure, is the dose equivalent at a tissue depth of 1 centimeter 

(1000 mg/cm2).



Shallow dose equivalent (HS) applies to the external exposure of the 

skin or an extremity and is taken as the dose equivalent at a tissue 

depth of 0.007 centimeter (7 mg/cm2) averaged over an area 1 square 

centimeter.



§ 20.1201 Occupational dose limits for adults.

(c) The assigned deep-dose equivalent and shallow dose-equivalent 

must be for the part of the body receiving the highest exposure. The 

deep-dose equivalent, eye dose equivalent and shallow-dose equivalent 

may be assessed from surveys or other radiation measurements for the 

purpose of demonstrating compliance with the occupational dose 

limits, if the individual monitoring device was not in the region of 

highest potential exposure, or the results of individual monitoring 

are unavailable.

-------------------------------------------------

Sandy Perle

Director, Technical

ICN Worldwide Dosimetry Service

ICN Plaza, 3300 Hyland Avenue

Costa Mesa, CA 92626



Tel:(714) 545-0100 / (800) 548-5100  Extension 2306

Fax:(714) 668-3149



E-Mail: sandyfl@earthlink.net

E-Mail: sperle@icnpharm.com



Personal Website: http://sandy-travels.com/

ICN Worldwide Dosimetry Website: http://www.dosimetry.com/



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