ArticleMagnetic resonance in medicine2026
Simulation of dB/dt-Over-Electric Field Cardiac Magnetostimulation Safety Ratios in 75 Body Models and 18 Gradient Systems.
Article in Magnetic resonance in medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Motion-induced fields near an idealized actively shielded MRI magnet: a reproducible reduced-order framework for scaling and sensitivity from 1.5 to 7 T.Magma (New York, N.Y.) · 2026Article
- Electromagnetic and Electrophysiological Modeling of Cardiac Stimulation Thresholds in 13 MRI Gradient Systems and 56 Body Models.Magnetic resonance in medicine · 2026Article
- Simulation of dB/dt-Over-Electric Field Cardiac Magnetostimulation Safety Ratios in 75 Body Models and 18 Gradient Systems.Magnetic resonance in medicine · 2026Article
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10 authors.
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Abstract
purposeThe IEC 60601-2-33 standard provides consensus-based safety provisions for MRI equipment. Protection of patients against cardiac stimulation (CS) is based on limiting the maximum E-field induced by MRI gradient coils. In practice, this is achieved by imposing a conservative dB/dt threshold on any gradient waveform. The dB/dt-over-E-field conversion ratio currently used in IEC 60601-2-33 was derived in a homogeneous ellipsoid exposed to a uniform B-field and is 10 (T/s)*(V/m)
methodsWe performed two independent simulation studies in a total of 75 realistic body models and 13 commercial gradient systems and derived dB/dt-over-E-field ratios in the heart. We thresholded the E-field maps to mitigate the impact of staircasing artifacts in boundary voxels between the myocardium and the lungs.
resultsThresholding the E-field maps at the 99th percentile E-field value (E99) eliminates staircasing artifacts in both simulation studies. Study #1 predicts a larger range of dB/dt-over-E99 ratios (13-53 (T/s)*(V/m)
conclusionOur simulations of dB/dt-over-E-field ratios for cardiac safety in MRI cover a large range of realistic clinical scenarios. An increase of the allowable dB/dt beyond the current CS limit in IEC 60601-2-33 may be feasible.
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