MRI Safety: Physics,
Standards, and Open Problems
Skill level: Basic-Intermediate
Steven M. Conolly, Ph.D., Mark A. Griswold, Ph.D., Organizers
Sunday, 20 May
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Overview
On balance, MRI enjoys an enviable safety record. However, there
have been a small number of incidents reported, including some
fatalities in the scanner. Here we discuss potential risks and
quantify the relevant physical quantities where possible.
Methods of accident prevention are addressed.
Educational Objectives
Upon completion of this course, participants should be able to:
• Describe interactions with the ferrous metals and the main
field (projectile safety);
• Explain RF safety including RF burns and SAR scaling and
prevention rules;
• Assess gradient field safety concerns including magnetic
stimulation and peripheral nerve stimulation;
• List scaling rules for all three of the safety issues listed
above with field strength;
• Describe methods of monitoring these safety issues;
• Explain methods of mathematical models (analytic and
computational) to predict safety margins; and
• Describe special concerns for patients with implanted devices
(e.g. pacemakers or metal implants).
AUDIENCE DESCRIPTION
This course is designed for:
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Graduate students studying the
technology of MRI, and physicians looking to understand the
basic physics of MRI safety.
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One year of university physics, and
some knowledge of the physics of MRI (e.g., what are the three
main magnetic fields necessary for MRI)
are assumed.
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08:30 |
Background and History of MRI Safety |
Roger Luechinger, Ph.D. |
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09:00 |
Physics and Biology of High Field MRI Safety |
John Schenck, M.D., Ph.D. |
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09:30 |
Gradient stimulation |
Blaine A. Chronik, Ph.D. |
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10:00 |
Break - Meet the teachers |
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10:30 |
RF Coil safety |
Arne Reykowski, Ph.D. |
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11:00 |
Implications from safety modeling: RF and Gradient -
not available |
Stuart Crozier, Ph.D. |
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11:30 |
Ways to reduce SAR (RF pulses, Tx Sense) |
Ulrich Katscher;
Dr. Katscher wishes to |
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acknowledge the contribution of Dr. Ingmar |
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12:00 |
Break |
Graesslin to the development of this talk. |
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12:00 - 12: 15 - Meet the teachers |
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13:30 |
Metallic Implants and Pacemakers safety issues |
Jean A. Tkach, Ph.D. |
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14:00 |
Interventional device safety |
Steffen Weiss, Ph.D. |
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14:30 |
BioMonitoring in the Scanner: Challenges for Current
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Nathan J. McDannold, Ph.D. |
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Future Procedures |
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15:00 |
Adjournment |
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15:00 - 15:15 - Meet the Teachers |
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