Re: Medical RF Imaging

[Ted de Castro <tdc@XRAYTED.COM>]

I don't think it could be done with RF "shadows" as you suggest because

RF propagates through media far differently than by simple absorption.



BUT - as for NMR - At www.lbl.gov look for our newsletter called

Currents and there is a recent article "NMR Spectroscopy Shakes Off Its

Coils).



Without coils or magnets.  Brand new and prototype technology - but its

there!  Have a look.



Gary Isenhower wrote:

> 

> Thanks to everyone who responded to my question.  I got several "Ever

> heard of MRI?" messages.  I should have explicitly said that I am very

> familiar with MRI, even know something about the quantum mechanics

> involved :)

> 

> I posed the question because MRI is very expensive and requires a huge

> magnet.  I was thinking, wouldn't it be nice if there was a cheap,

> portable RF imaging device.  In college I participated in some research

> that sought to use RF transmission thru tissue to determine glucose

> levels in the blood ( for diabetics).  I believe that device is now

> widely available.

> 

> I imagined something like a computed tomography scanner that could

> measure RF transmission, then use filtered back projection to

> reconstruct an image.  Even if only say 2-10% transmission is detected,

> that should be plenty to determine absorption coefficients.  I

> "fantasized" that such could be made as small as (or smaller than) some

> of the new mini c-arms that have become popular recently

> 

> So far, I have heard no solid reason why its impossible.  Perhaps I will

> invent it and become a "biased corporate interest".  Then I could

> completely reverse my position on radiation safety and urge the public

> to shun harmful radiation in favor of my all-natural imaging technology.

> ;)

>     _______________________________________________

> 

>         Gary Isenhower

>         713-798-8353

>         garyi@bcm.tmc.edu

> ************************************************************************

> You are currently subscribed to the Radsafe mailing list. To unsubscribe,

> send an e-mail to Majordomo@list.vanderbilt.edu  Put the text "unsubscribe

> radsafe" (no quote marks) in the body of the e-mail, with no subject line.

************************************************************************

You are currently subscribed to the Radsafe mailing list. To unsubscribe,

send an e-mail to Majordomo@list.vanderbilt.edu  Put the text "unsubscribe

radsafe" (no quote marks) in the body of the e-mail, with no subject line.