{TAIL ~ separate voltmeter} means connected to each electrode for measuring individual voltages at each electrode with respect to the common ground due to the multiplicity of concurrent patterns for use in {HEAD ~ imaging} at least part of the volume of the body 
{ TAIL ~ separate voltmeter } means connected to each electrode for measuring individual voltages at each electrode with respect to the common ground due to the multiplicity of concurrent patterns for use in { HEAD ~ imaging } at least part of the volume of the body
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH