[ RadSafe ] Ge-68 impurity in Ga-68

Geo>K0FF GEOelectronics at netscape.com
Sat Jun 21 09:19:12 CDT 2008

Does your generator system use a cold trap?

George Dowell
New London Nucleonics Lab
----- Original Message ----- 
From: "Ravinkumar Sobnack" <rvn.sbnck at ntlworld.com>
To: <radsafe at radlab.nl>
Sent: Saturday, June 21, 2008 12:24 AM
Subject: [ RadSafe ] Ge-68 impurity in Ga-68

> Dear Radsafe members
> We have recently got hold of a Ge-68/Ga-68 generator for pre-clinical R&D
> and phantom studies in our PET/CT facility and we are faced with 
> long-lived
> Ge-68 breakthrough. This poses a problem with Ge-68 waste disposal,
> contaminated phantoms and concerns for eventual use in clinical studies. 
> The
> annual limit on intake for this nuclide is for a whole body dose of 5 mSv 
> is
> about 20 MBq. I have 3 queries:
> 1. Is there any existing guide to acceptable impurity level in the
> eluate for this generator, as we do for Mo99/Tc99m generator?
> 2. Is there any quick and easy way to check the Ge-68 breakthrough?
> 3. Is there an FDA-approved Ge/Ga generator?
> I would appreciate any help.
> Ravin Sobnack
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