Simulation of dB/dt-Over-Electric Field Cardiac Magnetostimulation Safety Ratios in 75 Body Models and 18 Gradient Systems.

ABSTRACT:

Purpose

The 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)^-1. This limit is becoming increasingly restrictive in high performance clinical systems. We therefore evaluate dB/dt-over-E-field ratios in realistic body models and coils using state-of-the-art electromagnetic simulations.

Methods

We performed two independent simulation studies in a t

SUBMITTER: Klein V 

PROVIDER: S-EPMC12746381 | biostudies-literature | 2026 Mar

REPOSITORIES: biostudies-literature