[Test-Equipment] Radioactive Tube Stamp

[rbethman]

  The precise quotation is: "The contrast  medium used in MRI, generally 
gadolinium <http://www.wisegeek.com/what-is-gadolinium.htm>, ".  One may 
also wish to include that this is YOUR area of expertise as a professional.

It is ONLY one of the possible dyes used.  In the same reference, 
<http://www.wisegeek.com/what-is-an-mri-with-contrast.htm>, it also 
speaks to the use of Iodine Dyes.

"Rehr MRI", is but ONE specific type.  It is *PRIMARILY* used in cardiac 
MRIs.  It is not "a major" MRI use in the numbers of MRIs conducted.

The most "usual" use of radioactive IV Contrast solutions has been in 
CAT or CT scans.  This does not however exclude the entire realm of the 
"types" of MRIs that are done.

Personally, I *much* prefer to use ASK.COM in lieu of Google.  The 
results are shorter and more to the real point when one uses the 
"proper" search criteria.

On 7/4/2010 2:03 PM, Roger Rehr wrote:
> Note to all:
>
> MRI does NOT use a 'radioactive contrast IV solution'.  Gadolinium
> compounds are used, and have been since the 1980s, and they are NOT
> radioactive.
>
> If you google 'Rehr MRI' you will get a few references that give more
> info.
>
> 73,
>
> Roger Rehr
> W3SZ
>
> On Jul 4, 2010, at 1:37 PM, J. Forster wrote:
>
>> Correct. The MRI actually uses the same principles as a YIG
>> oscillator or
>> YIG filter, which was originally called NMR (Nuclear Magnetic
>> Resonance).
>> Edward Purcell at Harvard got the Nobel Prize for discovering it.
>>
>> NMR was originally used for chemical analysis with a magnetic field
>> and
>> swept HF excitation.
>>
>> MRI is the same technology, but introduces a gradient into the
>> magnetic
>> field and lots of computing to develop 3-D images.
>>
>> Happy Fourth,
>>
>> -John
>>
>> ================
>>
>>
>> [snip]
>>> The reference to MRIs and radioactive issues is the RADIOACTIVE
>>> CONTRAST
>>> IV SOLUTION.  It is NOT the MRI itself.
>> [snip]
>>> Have a happy 4th!
>>>
>>> Bob - N0DGN
>>
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