[Test-Equipment] Radioactive Tube Stamp

[Roger Rehr]

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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