Re: Epidemiological evidence of lung cancer risk

["jenday1" <jenday1@EMAIL.MSN.COM>]

Dr. Ching,

In the U.S., facilities allowed to administer radioactive gases or

uncollected aerosols are required to ensure that doses will not exceed the

annual limits of intake (ALI) of 50 mSv/y (5 rem/y) TEDE.  At our facility,

we use a lower value by subtracting out expected external exposure values.

Semiannual reports of air flow in delivery rooms are required, and along

with the posting of evacation times.  Thus, doses from the inhalation of

such gases rarely if ever exceed regulatory limits.



I am not aware at this time of any current studies of cancers or other

health risks to nuclear medicine technicians, but would like to know any

have been performed.



-- John



John Jacobus, MS

Certified Health Physicist

3050 Traymore Lane

Bowie, MD 20715-2024

jenday1@email.msn.com (H)





Lam Hoi Ching wrote:

Dear radsafers,

    I am in search of the epidemiology evidence of lung cancer risk for

radiation staff in Nuclear Medicine. Those ventilation  scans involve the

use of Xenon, Krypton and Technegas are radioactive gases which pose risk

due to lung dose but epidemiogical evidence is lacking.

    Thank you for any advice.





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