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Abstract #1871

Reducing the peak SAR surrounding implanted lead tips in 3T MRI using a high-dielectric helmet former: a numerical feasibility study

Zidan Yu 1 , Sherman Xuegang Xin 1,2 , and Christopher Collins 1

1 Bernard and Irene Schwartz Center for Biomedical Imaging, New York University School of Medicine, New York, New York, United States, 2 Biomedical Engineering, Southern Medical University, Guangzhou, Guangdong, China

Due to the high likelihood for a patient implanted with a pacemaker to take an MRI exam, and the significant concern about the SAR around the lead tip of an implanted pacemaker, the feasibility of employing high permittivity materials for reducing the SAR is explored here. The results indicated that it is promising to reduce heating around the lead tip with use of dielectric materials in a situation where a patient with an implanted pacemaker undergoes an MR scan of head and a large birdcage coil is used in transmission but a local receive coil is used in reception.

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