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Abstract #1875

Is Pacemaker Lead-Tip Heating Greater at 1.5T or 3T?

Deborah Anne Langman 1 , Eric Aliotta 1,2 , Dan Margolis 1 , J. Paul Finn 1,2 , and Daniel B Ennis 1,2

1 Radiological Sciences, UCLA, Los Angeles, CA, United States, 2 Biomedical Physics IDP, UCLA, Los Angeles, CA, United States

3T MRI exams for patients with pacemakers and ICDs is contraindicated, largely due to concerns that lead-tip heating is worse at 3T. Our objective was to characterize in vitro pacemaker lead-tip heating during a range of 3T MRI exams compared to 1.5T. 3T lead-tip heating was found to be lower than 1.5T lead-tip heating near the center of the B1-coil and higher near the periphery, whereas for 1.5T the highest heating was near the center of the B1-coil. Our reluctance to scan patients with pacemakers or ICDs at 3T may be misguided under some conditions and deserves greater consideration.

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