X-Message-Number: 3339
From:  (David Stodolsky)
Subject: CRYONICS: Re: Brain scanning, reply to Yvan Bozzonetti
Date: Sun, 23 Oct 94 16:07:55 +0100 (MET)

In Message: #3332 - Brain scanning, reply to Yvan Bozzonetti
Brian Wowk <> writes:
>        The only thing that makes x-ray holography marginally possible
>at 1keV is the low energy per photon.  However if you want to image  
>anything larger than an insect, higher energies are required.  As energy
>is increased, the cross section for coherent scattering drops, and the
>energy per absorbed photon increases, escalating the required dose to
>ridiculous (vaporizing) levels for something as large as a brain.

What about just enough energy to image the depth of the cortical sheet?

>         I reiterate: Nobody is ever going to use ionizing radiation to
> "read out" the memories of an intact whole brain.

You are imposing unnecessary requirements. Assume vaporization
is permitted. Can the information be extracted under that condition,
or does the vapor generated absorb most of the image beam?

David S. Stodolsky, PhD               Internet: 
Peder Lykkes Vej 8, 4. tv.      (C)         Tel.: + 45 32 97 66 74
DK-2300 Copenhagen S, Denmark                Fax: + 45 32 84 08 28

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