Measurement of current density vectors in a live pig for the study of human electro-muscular incapacitation devices

Current density imaging (CDI) is an MRI technique used to quantitatively measure current density vectors in biological tissue. A CDI sequence and corresponding experimental method were developed for the study of human electro-muscular incapacitation (HEMI) devices using an animal model. Measurements of current density vectors were performed in piglets weighing 4 to 5 kg. Pathways of current density vectors in the region of the chest and heart were investigated using vector plotting and streamline integration methods. Measurement of current density vectors were also used to analyze the relationship between applied current amplitude and measured current density magnitude in the range of 10 mA to 45 mA of applied current.