Re: [CAD_CAM_EDM_DRO] help putting together a complete system

John:

Inside a Cat Scanner is a normal (but heavy duty) X-Ray tube. The dose
of radiation from a CT is actually far greater than a normal X-Ray, but is
collimated to a slice thickness of typically 5mm or so. But the accumulated
dose is still greater than having an X-Ray of the area being scanned.
As to Magnets, I work with resonance scanners where we magnetise the
human body, making the hydrogen protons spin together in the same
orientation, then by putting a coil perpendicular to the body, we can read a
voltage proportional to the amount of hydrogen (water) in that part of the
body. Talk about your small magnets. The MRI of a head is actually the best
3d data to use for sculpting, you can get the skull or skin or just brain if
you want.

Art

----- Original Message -----
From: <info.host@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, June 05, 2001 2:51 PM
Subject: Re: [CAD_CAM_EDM_DRO] help putting together a complete system


> > Jeff:
> >
> > Very good, and quite workable too. Since I have access to a cat
scanner,
> I
> > do the same thing sorta, but mine requires radiation. (I pretty much
glow
> in
> > the dark these days).
> >
> > And you can eat the bread afterwards.....hmmm the marvels of technology.
>
> Do cat scanners use exactly the same wavelength as a normal x-ray tube in
a
> hospital? Because I've seen them take tens and tens of pictures to slice
up
> someone's head, photographically of coarse, isn't that like having many,
> many x-rays in one go or is each shot a lower energy?
>
> John
>
>
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