Re: Veterinary Nuclear Medicine

["Wesley M. Dunn" <WDUNN@brc1.tdh.state.tx.us>]

However, the 5mSv rule only refers to exposure from human patients.

The 1 mSv limit still remains from veterinary practice.
Historically, the animal patient is held until no discernable
radiation remains (either radioactive material in the excreta or
direct radiation exposure readings from the animal).

For Tc- 99m, that has not been such a problem.  However, with the
advent of I-131 therapy for cats and, to a much lesser extent, dogs,
the holding time can become very significant.

I can provide some numbers for I-131 in cats that we use, however, it
is based on older data.  I would suspect that several of the research
clinics doing this treatment might have better numbers .

Wes

> Date:          Mon, 13 May 96 13:57:40 -0500
> Reply-to:      radsafe@romulus.ehs.uiuc.edu
> From:          Ccja@aol.com
> To:            Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
> Subject:       Re: Veterinary Nuclear Medicine

> It's my impression that the NRC plans to retain the 5 mSv Rule, for human
> nuclear medicine. The recent NUREG-1492, "Regulatory Analysis on Criteria for
> the Release of Patients Administered Radioactive Material", an ALARA
> engineering study, recommended that policy.


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Wesley M. Dunn, C.H.P.                     512-834-6688
Deputy Director, Licensing                 512-834-6690 (fax)
(Texas) Bureau of Radiation Control        wdunn@brc1.tdh.state.tx.us
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