Principles of MRI - Department of Radiology
Principles of MRI - Department of Radiology
Principles of MRI - Department of Radiology
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Evolution <strong>of</strong> <strong>Radiology</strong>:<br />
Focus on MSK <strong>MRI</strong><br />
The Evolution <strong>of</strong> <strong>Radiology</strong><br />
Radiographs<br />
Tomography<br />
CT<br />
MR<br />
Signal<br />
Sequences<br />
Coils<br />
Magnets<br />
Safety<br />
Hardware<br />
www.schreibman.info<br />
© 2011 Ken L Schreibman, PhD/MD<br />
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slide viewed<br />
Focus on Musculoskeletal <strong>MRI</strong><br />
The Big Problem with <strong>MRI</strong><br />
It’s a Big Magnet<br />
It’s a Big Magnet<br />
It’s Always On<br />
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Slide 55 <strong>of</strong> 88<br />
The Evolution <strong>of</strong> <strong>Radiology</strong><br />
Radiographs<br />
Tomography<br />
CT<br />
MR<br />
Signal<br />
Sequences<br />
Coils<br />
Magnets<br />
Safety<br />
Hardware<br />
www.schreibman.info<br />
© 2011 Ken L Schreibman, PhD/MD<br />
page 10 <strong>of</strong> 15<br />
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Focus on Musculoskeletal <strong>MRI</strong><br />
Why is it Always On?<br />
Isn’t it an electromagnet?<br />
‣Can’t we just flick a switch and turn it <strong>of</strong>f?<br />
‣It’s not that simple…<br />
‣Yes, it’s an electromagnet.<br />
‣Yes, it works by passing current through wire<br />
To achieve 1.5T, need to pass A LOT<br />
<strong>of</strong> current through wire<br />
‣Requires low resistance wire…<br />
‣…super-conducting wire<br />
‣Super-conducting materials operate at<br />
CRYOGENIC TEMPERATURES!<br />
‣Can’t turn <strong>of</strong>f magnet with venting cryogens.<br />
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next slide<br />
Slide 56 <strong>of</strong> 88<br />
The Evolution <strong>of</strong> <strong>Radiology</strong><br />
Radiographs<br />
Tomography<br />
CT<br />
MR<br />
Signal<br />
Sequences<br />
Coils<br />
Magnets<br />
Safety<br />
Hardware<br />
www.schreibman.info<br />
© 2011 Ken L Schreibman, PhD/MD<br />
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Focus on Musculoskeletal <strong>MRI</strong><br />
Occasionally Replenish Cryogens<br />
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next slide<br />
Slide 57 <strong>of</strong> 88<br />
The Evolution <strong>of</strong> <strong>Radiology</strong><br />
Radiographs<br />
Tomography<br />
CT<br />
MR<br />
Signal<br />
Sequences<br />
Coils<br />
Magnets<br />
Safety<br />
Hardware<br />
www.schreibman.info<br />
© 2011 Ken L Schreibman, PhD/MD<br />
<strong>MRI</strong> Safety<br />
Everyone in the entire<br />
medical center needs<br />
to respect <strong>MRI</strong> safety<br />
Can’t bring into the<br />
scanner room<br />
anything that is:<br />
‣Ferromagnetic<br />
‣Electronic<br />
that is not certified<br />
<strong>MRI</strong> compatible.<br />
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Focus on Musculoskeletal <strong>MRI</strong><br />
Jump to<br />
next slide<br />
Slide 58 <strong>of</strong> 88<br />
The Evolution <strong>of</strong> <strong>Radiology</strong><br />
Radiographs<br />
Tomography<br />
CT<br />
MR<br />
Signal<br />
Sequences<br />
Coils<br />
Magnets<br />
Safety<br />
Hardware<br />
Safety Videos<br />
Focus on Musculoskeletal <strong>MRI</strong><br />
The Evolution <strong>of</strong> <strong>Radiology</strong><br />
Radiographs<br />
Tomography<br />
CT<br />
MR<br />
Signal<br />
Sequences<br />
Coils<br />
Magnets<br />
Safety<br />
Hardware<br />
Focus on Musculoskeletal <strong>MRI</strong><br />
Things Stuck in Magnets: Floor Buffer<br />
www.schreibman.info www.patiencys.com/mri-safety<br />
© 2011 Ken L Schreibman, PhD/MD<br />
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Slide 59 <strong>of</strong> 88<br />
www.schreibman.info www.<strong>MRI</strong>metalDetector.com<br />
© 2011 Ken L Schreibman, PhD/MD<br />
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Slide 60 <strong>of</strong> 88<br />
©Ken L Schreibman, PhD/MD 10/10/11 www.schreibman.info
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