Re: [CAD_CAM_EDM_DRO] help putting together a complete system

Hi Art,

I had an MRI scan quite recently - not an experience to be recommended very
often!! As I lay there pinned inside the tight tube wondering if all the
staff had gone home for the night and forgotten me, a couple of thoughts
passed through my mind. Why does the tube have to be made just too small for
a 'normal' sized chap like me and why don't they line the tube with tanning
tubes so you could at least come out thinking that something had been
achieved?! ;o)

Ian
--
Ian W. Wright
Sheffield UK
www.iw63.freeserve.co.uk

----- Original Message -----
From: "Art Fenerty" <fenerty@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: 06 June 2001 03:03
Subject: 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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> >
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>
>
> Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the
discussion of shop built systems, for CAD, CAM, EDM, and DRO.
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
>
> Post messages: CAD_CAM_EDM_DRO@yahoogroups.com
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
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> Moderator: jmelson@... timg@... [Moderator]
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> bill,
> List Manager
>
> FAQ: http://www.ktmarketing.com/faq.html
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
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>
>