[ RadSafe ] Annual dose from Nature/Background/Man-made sources

[Muckerheide, Jim (CDA)]

Fred Mettler presented the study results at the April NCRP Annual
Meeting; and I've seen a report that he had presented it elsewhere since
then.

Regards, Jim 
 

>-----Original Message-----
>From: radsafe-bounces at radlab.nl 
>[mailto:radsafe-bounces at radlab.nl] On Behalf Of Johnston, Thomas
>Sent: Tuesday, July 31, 2007 2:56 PM
>To: Academic-Medical Radiation Safety Officers listserve; 
>radsafe at radlab.nl
>Subject: [ RadSafe ] Annual dose from 
>Nature/Background/Man-made sources
>
>Per the NCRP site, the draft of NCRP Report No. 93 should be out soon.
>
>Tom
>
>-----Original Message-----
>From: amrso-bounces at mailman.mcw.edu
>[mailto:amrso-bounces at mailman.mcw.edu] On Behalf Of Johnston, Thomas
>Sent: Tuesday, July 31, 2007 2:41 PM
>To: Muckerheide, Jim (CDA); radsafe at radlab.nl; Academic-Medical
>Radiation Safety Officers listserve
>Subject: Re: [AMRSO] [ RadSafe ] Annual dose from
>Nature/Background/Man-madesources
>
>Jim
>Thank you very much. I was just scanning the NCRP site for this
>information. Will we have to update our pie charts?
>
>Tom
>
>-----Original Message-----
>From: Muckerheide, Jim (CDA) [mailto:Jim.Muckerheide at state.ma.us] 
>Sent: Tuesday, July 31, 2007 2:38 PM
>To: Johnston, Thomas; radsafe at radlab.nl; Academic-Medical Radiation
>Safety Officers listserve
>Subject: RE: [ RadSafe ] Annual dose from Nature/Background/Man-made
>sources
>
>The new NCRP estimate for average medical exposure is 320 
>mr/yr, up from
>54 mr/yr in 1987.  The 360 is from 300 nat bkgd (in the U.S., 
>240 in the
>world) plus 60 medical (54) and other (6?)
>
>Assuming nat bkgd at 300, and med is 320, will the new total bkgd be
>625?, 630?  Up from "360" - and now we have to explain that to our
>students and trainees, and the public.
>
>(With 0.32 rem avg med doses, times U.S. 300 million people, is 100
>million person-rem, each year?  Using 50 years for 'effective lifetime'
>doses, 5 billion rem?  So LNT-nuts claim diagnostic medicine is killing
>how many people in a generation? :-)  
>
>Good grief :-(
>
>Regards, Jim Muckerheide
> 
>
>>-----Original Message-----
>>From: radsafe-bounces at radlab.nl 
>>[mailto:radsafe-bounces at radlab.nl] On Behalf Of Johnston, Thomas
>>Sent: Tuesday, July 31, 2007 1:09 PM
>>To: radsafe at radlab.nl; Academic-Medical Radiation Safety 
>>Officers listserve
>>Subject: [ RadSafe ] Annual dose from 
>>Nature/Background/Man-made sources
>>
>>I recently read a paper regarding the average doses from medical
>>diagnostic procedures has increased, rather than decreased. This is
>>primarily due to multi-slice CT imaging techniques. (Sorry, 
>>but I cannot
>>recall the journal!)
>>
>> 
>>
>>Question, will there be a change to the average annual dose 
>of 360/year
>>from Nature/Background/Man-made sources that we have been 
>>using for some
>>time? (Unless, of course, you happen to live in Denver, etc.) If so,
>>when will the change take effect? I know I should also pose this
>>question to the "Ask the Experts" on www.hps.com 
>><http://www.hps.com/> .
>>
>> 
>>
>>Does anyone have any insight on this matter? Yours thoughts 
>>and comments
>>are welcome.
>>
>> 
>>
>>Thomas P. Johnston
>>
>>Radiation Safety Officer
>>
>>New York Medical College
>>
>>Valhalla, NY 10595
>>
>>914-594-4448 office
>>
>>914-594-3665 fax
>>
>>914-557-5950 mobile
>>
>>tom_johnston at nymc.edu
>>
>> 
>>
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>
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