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Re: Pet facility and F-18
Dear Sim
No you are not missing anything!
I have calculated a PET room for F-18 , with a workload of 50
mCi.hr/week,assuming an occupancy factor of 1 ,a permissible dose of
2mRem/hr, at a distance of 3m to the wall. I got 2.7 mm Pb or 5 cm concrete.
Remember that it's advantageous to use concrete at this energy range
( the TVL for concrete is 22 cm and for Pb is 1.329 cm).
Sergio
=================================================================
Sergio Faermann, Ph.D. Tel: 972-7-6403301
Department of Oncology Fax: 972-7-6232336
Soroka University Medical Center
P.O.B 151 E-mail:sergio@bgumail.bgu.ac.il
Beer-Sheva, Israel 84101
=================================================================
On Tue, 3 Nov 1998, Sim Shanks wrote:
> We are in the process of installing a PET scanner. At this time the only
> isotope to be used is F-18. The average doses will be 5 to 6 mCi. 5
> patients / day.
>
> I am seeking shielding advice. My calculations for most of the room (13 x
> 20 feet) require 1/4 inch lead shielding. However, I have heard that some
> facilities have used as much as 1/2 inch of lead.
>
> What am I missing? Please send responses to me at my e-mail address below.
>
> Thank you in advance.
>
> ----------------------------------------------------------------------------
> --------
> Sim Shanks, RSO shankss@odrge.odr.georgetown.edu
> Georgetown University (202) 687-4712
> Office of Environmental Health and Safety fax (202) 687-5046
> 3900 Reservoir Road, N.W.
> Washington DC 20007
>
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