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Re: Thalium Stress Test
Kelly
I'm not sure that anyone on this list, other than the highly estimable Dr
Carol Marcus, is in a position to second guess a doc on this.
But, briefly, Tl-201 Chloride is usually (last I knew) given during a
resting phase. The EDE, for a typical dose of four(4) mCi, is 2.4
rem. The stressful phase of the test would then use Tc99m (as, e.g.,
Cardiolite); twenty (20) mCi is not an unusual dose, and the corresponding
EDE would be 0.96 rem.
I highly recommend that your friend ask his doc, and anyone else involved
with the study, what the purpose of it is. Also, please note that
examinations in medical imaging are more frequently complementary, than
substitutive, or exclusive.
Break a leg
cja
At 10:24 AM 1/8/01 -0600, you wrote:
>OK,
>Here's one for all you medical folks out there. One of my people (40 year
>old male) had a 3 week bout with pneumonia last year. This year when exposed
>to cold outside air (0 degrees and below) he has experienced some central
>(sternum) chest pain that goes away when he doesn't breathe the cold air. He
>doesn't have any history or family history of cardiac illness.
>
>His family practice physician (not a cardiologist) has ordered a thalium
>stress test. He's been asking me and we're both wondering why? It's not
>clear what the doc is looking for.
>
>Does this make sense from an ALARA perspective? Is there an alternate
>diagnostic procedure that doesn't involve radioactive material? i.e. echo or
>stress echo
>
>If he proceeds with this procedure what might his expected dose be?
>
>Thanks
>
>Kelly Grahn
>Illinois Department of Nuclear Safety
>West Chicago Field Office
>
>grahnk@aol.com
>or
>grahn@idns.state.il.us
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