Measuremnet of dB/dt of MRI Systems

Abstract

In recent years, as gradient magnetic resonance imaging (MRI)systems have become larger and faster, the influence of low-frequency alternating magnetic fields on the human body during rapid scanning have become significant in terms of patient health. It has become more important to monitor time-variant magnetic fields (dB/dt). From this point of view, we measured the maximum dB/dt for clinical scanning using a self-made search coil and storage oscilloscope that conformed to international standard IEC 60601-2-33(1995). The results were almost the same as the calculated values. In this brief report, we introduce to clinical operators the method of measuring maximum dB/dt.