Maximum fields for MRI systems pose overly restrictive guidelines for MR compatible device development. Logging of gradient strengths on a Siemens Prisma 3T MRI showed that during clinically relevant neuro scans, peak gradient strength reached 63.97 ± 0.05 mT/m, lower than the system maximum of 80 mT/m. In addition, peak slew rate during this protocol was measured to be 183.9 ± 0.2 T/m/s, compared to the system maximum of 200 T/m/s. This allows more flexibility for MR compatible device manufacturers due to the large discrepancy between the system maximum, and the practical maximums that the system reaches.
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