A platinum subdural grid electrode (used for seizure monitoring) was tested for potential heating during magnetic resonance (MR) imaging at 1.5 and 3.0 T. Fast spin-echo imaging with high radio-frequency transmitted power was performed while temperature measurements for the grid phantom were recorded by means of fiberoptic thermometry. Temperature variations remained within 1.0°C. MR imaging examination in patients in whom such grid electrodes are implanted is expected to result in clinically insignificant temperature changes in the vicinity of the grid electrode or its leads.
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Kanal et al. (1999) studied this question.
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