Re: MDL and Dose Effects -Reply

["Sandy Perle" <sandyfl@ix.netcom.com>]

If the model used for the system calibration is statistically valid, 
i.e., there are an equal number of negative values as well as 
positive values, the overall conclusion is that the system is geared 
more to under-response, and reduction of false positives. My 
experience has been that if the dosimetry system used, be if for 
environmental or personnel monitoring, is fine tuned to minimize 
variation within the population of dosimeter measurements, the 
accuracy value can be set whereby false positives are eliminated for 
all practical purposes, without the need to assess or display 
negative values. One must not force a normal distribution to ensure 
the elimination of false positives. I want to emphasize that I am NOT 
suggesting that reporting negatives is due to reduction of false 
positives, although that is one net result.

Sandy Perle
Director, Technical Operations
ICN Dosimetry Division
Office: (800) 548-5100 Ext. 2306 
Fax: (714) 668-3149

E-Mail: sandyfl@ix.netcom.com