Selective characterization of material under test (MUT) with electromagnetic impedance tomography and spectroscopy
First Claim
1. A method of characterizing select volumes of a material under test (MUT) using electromagnetic impedance tomography and spectroscopy, the method comprising:
- positioning an electrode array parallel to a surface of the MUT;
instructing a signal generator operably connected with the electrode array to transmit a set of tomographic signals from the array of electrodes into the MUT;
obtaining a complex impedance of a volume or voxel of the MUT based upon a return signal received at the electrode array while the electrode array remains in communication with the MUT; and
applying at least one of a series circuit approach or a parallel circuit approach to compute a complex impedance of;
segments of the volume, or sub-voxel of the voxel, using the measured values of the volume or voxel of the MUT.
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Abstract
A method of extracting complex impedance from selected volumes of the material under test (MUT) combined with various embodiments of electrode sensor arrays. Configurations of linear and planar electrode arrays provide measured data of complex impedance of selected volumes, or voxels, of the MUT, which then can be used to extract the impedance of selected sub-volumes or sub-voxels of the MUT through application of circuit theory. The complex impedance characteristics of the sub-voxels may be used to identify variations in the properties of the various sub-voxels of the MUT, or be correlated to physical properties of the MUT using electromagnetic impedance tomography and/or spectroscopy.
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Citations
19 Claims
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1. A method of characterizing select volumes of a material under test (MUT) using electromagnetic impedance tomography and spectroscopy, the method comprising:
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positioning an electrode array parallel to a surface of the MUT; instructing a signal generator operably connected with the electrode array to transmit a set of tomographic signals from the array of electrodes into the MUT; obtaining a complex impedance of a volume or voxel of the MUT based upon a return signal received at the electrode array while the electrode array remains in communication with the MUT; and applying at least one of a series circuit approach or a parallel circuit approach to compute a complex impedance of;
segments of the volume, or sub-voxel of the voxel, using the measured values of the volume or voxel of the MUT. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification