From: John Clark (jonkc@worldnet.att.net)
Date: Thu Apr 26 2001 - 11:10:14 MDT
Brent Allsop <allsop@fc.hp.com> Wrote:
>Our ability to scan at ever increasing resolutions is increasing just
>like computer power and everything else isn't it?
Existing MRI machines are good enough for an upload, but you'd have
to be very patient. If a machine has a constant signal to noise ratio then
the scan time increases to the 6th power of the resolution. If it took you
1 second to get 1 mm resolution it would take 10^28 years for 1 nanometer.
The strength of a magnetic resonance signal depends of how sharply it varies
in space, so resolutions of a few nanometers can and has been achieved in a
reasonable time by bringing the sample close, very, very, close to the magnet,
unfortunately to do this the sample must be microscopic.
John K Clark jonkc@att.net
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