[ RadSafe ] Update on lead aprons in nuclear medicine

Jeremy Nicoll jeremy.nicoll at otago.ac.nz
Mon Aug 25 17:32:50 CDT 2014

I'm not quite sure what you're working with, how much and how close, for how long etc., but the HVL for Tc-99m gammas is 0.3 mm Pb, so that should let you do some calcs.  If the thicknesses you talk of are Pb equivalences then the apron isn't going to do a lot, compared with the inconvenience of wearing it, and the thyroid shield, and perhaps the Pb glass specs.
I don't know of any Nuc Med unit where aprons are worn routinely for RP.


Dr Jeremy J Nicoll
Radiation Safety Advisor
University of Otago

-----Original Message-----
From: radsafe-bounces at agni.phys.iit.edu [mailto:radsafe-bounces at agni.phys.iit.edu] On Behalf Of Ålund Maria
Sent: Thursday, 21 August 2014 12:16 a.m.
To: radsafe at agni.phys.iit.edu
Subject: [ RadSafe ] Update on lead aprons in nuclear medicine


I am wondering if the lead aprons has ben improved for nuclear medicine workers the latest years. I read a question dated from 1997, *Lead aprons in nuclear medicine,* (*http://health.phys.iit.edu/extended_archive/9703/msg00011.html
<http://health.phys.iit.edu/extended_archive/9703/msg00011.html>) *that stated that lead aprons suitable for x-rays is not necessarily enough shield to be used for gamma rays. Are the composite aprons that weight less equal as good as a conventional lead apron nowadays? And which thickness should then be used? The aprons that are being used at my workplace is made of the composite material and has the thickness of 0.25 and 0.35mm. The radiophysics says that this is enough.

Thanks for your help.

Maria Ålund

Biomedical scientist, Sweden
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