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Abstract #1851

Derived MRI induced Maximum Torque (ASTM F2213) from measured MRI induced Maximum Force (per ASTM F2052)

Richard Williamson 1 , Michael Childers 1 , Tushar Dharampal 1 , Shiloh Sison 1 , Amber Durica 1 , Gabriel Mouchawar 1 , and John Nyenhuis 2

1 St. Jude Medical, Sylmar, California, United States, 2 Purdue University, West Lafayette, Indiana, United States

This abstract demonstrates that for some implantable devices, torque testing per ASTM F2213 as a part of MR conditional safety assessment, may not be necessary as a conservative magnetic torque value may be calculated using the measured magnetically induced force per ASTM F2052 along with the physical properties of the device. Two conservative upper-bound equations (Tier 1 and Tier 2) are derived and used to estimate the magnetically induced torque for four implantable devices.

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