Patent ID: 7970461
Filing Date: 2011-06-28
Classification: A61B

Abstract:
1. A method for determining conditions of a bio-object, comprising a biological tissue by measuring electrical characteristics of the bio-object, the method comprising: generating a first excitation signal and generating a first reference signal, whereas said first reference signal is delayed compared to said first excitation signal by a first delay time and said first excitation signal having a periodic waveform with a first predetermined frequency; introducing said first excitation signal into the bio-object and receiving a first response signal from the bio-object; cross-correlating said first response signal and said first reference signal, thereby producing a first cross-correlation product, said first cross-correlation product being a real number; and calculating a first set of indices characterizing conditions of the bio-object, based on said first cross-correlation product and said first delay time, wherein said first delay time is selected so as to maximize said first cross-correlation product for said first predetermined frequency.