Patent ID: 8386028

Claim:
A method of analyzing composition of a body, the method comprising: providing a first current signal having a first frequency to a first current path through the body and between a first upper extremity and a first lower extremity; simultaneously with providing of the first current signal, providing a second current signal having a second frequency distinguishable from the first frequency to a second current path through the body and between a second upper extremity and a second lower extremity; measuring voltage signals from voltage measuring positions of the four extremities while the first and second current signals are applied, each extremity comprising at least one of the voltage measuring positions; processing the measured voltage signals to determine a first value representing impedance of a first body segment with respect to the first frequency and a second value representing impedance of a second body segment with respect to the second frequency, wherein the first body segment is one of upper extremities, wherein said processing comprises estimating a third value representing impedance of the other upper extremity with respect to the first frequency based on the first value.