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RE: Article: How I set off the subway radiation meter



Bill,

If you look at Reg Guide 8.39, which gives guidance on release criteria for

patients.  A patient may be released if they have received 760 mCi of Tc-99m

(Yes, the number is 760)  The corresponding dose rate is 58 mrem/hr at one

meter.  Instructions on precautions are required if the patient received

over 150 mCi of Tc-99m and is being released.  Since most nuclear medicine

scans are around 5 to 25 mCi of Tc-99m, patients are never help for "decay."





As you say, and I agree with:

It's not about dose, it's about trust.

Let's look at the real problem, for a change.



-- John 

John Jacobus, MS

Certified Health Physicist 

3050 Traymore Lane

Bowie, MD  20715-2024



E-mail:  jenday1@email.msn.com (H)      



-----Original Message-----

From: William V Lipton [mailto:liptonw@dteenergy.com]

Sent: Friday, February 01, 2002 8:03 AM

To: Jacobus, John (OD/ORS)

Cc: RadSafe

Subject: Re: Article: How I set off the subway radiation meter





Presently 10 CFR 35.75(b) requires written instructions to released nuc med

patients only if the expected dose is likely to exceed 0.1 rem.  I assume

that this patient was under the regulatory threshold.



IMHO, this requirement should apply to ALL nuc med patients, due to the

situation described, here.

. . .

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