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Abstract #2647

The Effect of Patient Orientation on Pacemaker Lead-Tip Heating at 1.5T

Jessica A Martinez M1,2, Volkan Acikel2, Patrick Magrath1,2, and Daniel B. Ennis1,2

1Department of Bioengineering, University of California, Los Angeles, CA, United States, 2Department of Radiological Sciences, University of California, Los Angeles, CA, United States

Patients with pacemakers or implantable cardioverter defibrillators (ICDs) may require an MRI exam of any body part. Clinical guidelines indicate that patient orientation in the scanner depends only on the body part under examination. Lead tip heating (LTH) is also a function of patient orientation. In this study our objective was to compare LTH for head-first and feet-first orientations for five pacemakers with realistic implant configuration in the ASTM torso phantom. Our results suggest that depending on the anatomical region examined, proper patient orientation in the MRI scanner can reduce LTH.

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