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MRI Machines

Discussion in 'Electronic Design' started by RFI-EMI-GUY, Jun 24, 2008.

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  1. RFI-EMI-GUY

    RFI-EMI-GUY Guest

    Well I spent a half hour of my life under the magnet of an "open" MRI
    machine yesterday. Still a bit claustrophobic. While I sort of
    understand the theory of the MRI, what I don't understand is what
    creates all the noise and racket. Any experts out there that can tell me
    whats going on?


    --
    Joe Leikhim K4SAT
    "The RFI-EMI-GUY"©

    "Treason doth never prosper: what's the reason?
    For if it prosper, none dare call it treason."

    "Follow The Money" ;-P
     
  2. Joerg

    Joerg Guest

    It's coming off the gradient magnets, usually. I hope all is ok and you
    won't receive any nasty diagnosis from the session.
     
  3. Joerg

    Joerg Guest

    That's probably because you guys don't have a house with a narrow crawl
    space. At least you can be sure that there won't be critters such as
    rattle snakes waiting inside that MRI tube.
     
  4. J.A. Legris

    J.A. Legris Guest

    Noisy & boring is right. I fell asleep briefly and was mildly scolded
    for it - they could see my eyeballs rolling around.
     
  5. Bob Eld

    Bob Eld Guest

    I had a rattle snake in my garage a couple of weeks ago.
     
  6. Any obvious neural effects from the scanning fields?
     
  7. Is that because they check them every morning?
     
  8. RFI-EMI-GUY

    RFI-EMI-GUY Guest

    Thanks, nothing serious except a bad pain in my neck C5/C6 disk
    problems. It was a bit disheartening to hear the technician say "that
    looks real bad, you should get that fixed" Then I remembered she said
    same thing two years ago. The Dr reports it is same as before, only now
    it hurts worse. I guess I gotta do something :(

    --
    Joe Leikhim K4SAT
    "The RFI-EMI-GUY"©

    "Treason doth never prosper: what's the reason?
    For if it prosper, none dare call it treason."

    "Follow The Money" ;-P
     
  9. RFI-EMI-GUY

    RFI-EMI-GUY Guest

    Are they inside the machine or are they in the frame clamped around my
    head and neck?

    --
    Joe Leikhim K4SAT
    "The RFI-EMI-GUY"©

    "Treason doth never prosper: what's the reason?
    For if it prosper, none dare call it treason."

    "Follow The Money" ;-P
     
  10. RFI-EMI-GUY

    RFI-EMI-GUY Guest

    I told the tech to give me a time check every so often so I wouldn't
    lose my mind, then I worked out a design problem in my head for 30
    minutes as a distraction. I can put up with a lot of stuff but being
    inside or under that thing creeps me out. I keep having visions of
    oxygen cylinders getting sucked through the drywall and crushing me or
    the magnet quenching and getting burned in a puff of steam.

    --
    Joe Leikhim K4SAT
    "The RFI-EMI-GUY"©

    "Treason doth never prosper: what's the reason?
    For if it prosper, none dare call it treason."

    "Follow The Money" ;-P
     
  11. Joerg

    Joerg Guest

    They should never say that. It's almost like a surgeon saying "Oh s..t!
    That wasn't good."

    Must be painful. My sore ones are L4/L5/L6. The docs never figured out
    that I might have a magnesium deficiency. A CPA (!) gave me that hint.
    Taking them big Costco pills since two years. Knock on wood, in those
    two years it hasn't floored me once and that's a record.
     
  12. krw

    krw Guest

    They're moving? Wires loose? It certainly is noisy.
    I went into the tube last year. I'm pretty claustrophobic, but
    handled it OK. Not a chance of sleeping though. I certainly was
    ready to come out after a half-hour.
    Find anything? ;-)
     
  13. JeffM

    JeffM Guest

    ....and found nothing? :cool:
    SCNR. I'm surpirsed no one else took the shot.
     
  14. Well, bits of him twitching abnormally might be a sign.
    Google TMS
     
  15. Google "They're made out of meat" :)
     
  16. You miss my point. It's a cute and classic piece of writing:

    <http://www.terrybisson.com/meat.html>

    Clifford Heath.
     
  17. There are a number interesting modes of dying involving cryostats.

    Best regards,
    Spehro Pefhany
     
  18. Joerg

    Joerg Guest

    Look at the bright side: Until you lose consciousness you can speak at a
    high pitch like Mickey Mouse because of the helium. Should be fun ;-)
     
  19. T

    T Guest

  20. T

    T Guest

    I had a full head MRI about a year ago. I don't suffer claustrophobia
    and can tune out pretty much any noise. They actually had to nudge me
    awake to put the gadolinium contrast IV in.
     
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