X-Message-Number: 3272
From: Brian Wowk <>
Date: Sat, 15 Oct 94 16:39:54 CDT
Subject: SCI.CRYONICS Errata

>From my previous message on brain scanning:
 
> To 
> acquire an image with that resolution (0.1 microns) would require the
> absorption of at least 10^18 100keV x-ray photons, with a total energy
> of 10^23 eV or about 10,000 Joules.  For a 1kg brain, this is
> 10,000 rads of radiation-- a fatal dose!
 
        Actually 10,000 Joules per kg is 10,000 Gray (not rads) which
equals 1,000,000 rads!  A fatal dose indeed.
 
                                        --- Brian Wowk

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