Selective characterization of material under test (MUT) with electromagnetic impedance tomography and spectroscopy

A method of characterizing select volumes of a material under test (MUT) using an array of electrodes, the method comprising:

• instructing a signal generator to transmit a first set of tomographic signals from a first subset of the array of electrodes into the MUT;
• obtaining a first return signal from the array of electrodes after the transmitting of the first set of tomographic signals;
• instructing the signal generator to transmit a second set of tomographic signals from a second subset of the array of electrodes into the MUT based upon the first return signal, the second subset of the array of electrodes including at least one electrode not included in the first subset of the array of electrodes;
• obtaining a second return signal from the array of electrodes after the transmitting of the second set of tomographic signals;
• and
• combining the first return signal and the second return signal to determine a characteristic of the MUT.

A computer program product comprising program code stored on a non-transitory computer readable medium, which when executed by at least one computing device coupled to a signal generator and an array of electrodes, causes the at least one computing device to execute a method of characterizing select volumes of a material under test (MUT) by performing actions including:

• instructing the signal generator to transmit a first set of tomographic signals from a first subset of the array of electrodes into the MUT;
• obtaining a first return signal from the array of electrodes after the transmitting of the first set of tomographic signals;
• instructing the signal generator to transmit a second set of tomographic signals from a second subset of the array of electrodes into the MUT based upon the first return signal, the second subset of the array of electrodes including at least one electrode not included in the first subset of the array of electrodes;
• obtaining a second return signal from the array of electrodes after the transmitting of the second set of tomographic signals;
• and
• combining the first return signal and the second return signals to determine a characteristic of the MUT.