Patent ID: 8773151
Filing Date: 2014-07-08
Classification: A61B,G01R

Abstract:
1. Method for multichannel multifrequency analysis of an object, comprising: generating a set of excitation signals wherein all excitation signals are periodic signals with preselected frequencies; applying said set of excitation signals simultaneously to the object; receiving from the object, in response to said set of excitation signals, a response signal corresponding to said set of excitation signals, modulated by the object's properties, said response signal comprising a set of components with different frequencies; calculating a set of phase-related sampling instances based on said set of excitation signals, for each frequency of interest and for at least one predetermined observation time slot; demodulating said response signal to separate the response to each excitation signal by quantizing and processing of said response signal at each sampling instances of said set of sampling instances, wherein said quantizing is performed for each frequency of interest of said response signal in predetermined mode; and obtaining a set of main frequency and time tagged estimates, each of said estimates comprising a plurality of sub-estimates, said sub-estimates representing a signal value, for said observation time slot, wherein the length of said observation time slot is selected so that it contains integer numbers of periods of each excitation signal of said set of excitation signals, wherein each of said estimates are sorted separately so the estimates at each frequency of interest are obtained while impacts of other estimates are cancelled out.