Volumetric Induction Phase Shift Detection System for Determining Tissue Water Content Properties
AssigneeThe Regents of the University of California
InventorsBoris Rubinsky, Cesar A. GONZALEZ
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Abstract
A method and apparatus of determining the condition of a bulk tissue sample, by: positioning a bulk tissue sample between a pair of induction coils (or antennae); passing a spectrum of alternating current (or voltage) through a first of the induction coils (or antennae); measuring spectrum of alternating current (or voltage) produced in the second of the induction coils (or antennae); and comparing the phase shift between the spectrum of alternating currents (or voltages) in the first and second induction coils (or antennae), thereby determining the condition of the bulk tissue sample.
Claims21
A method of determining the condition of a bulk tissue sample, comprising:
- positioning a bulk tissue sample between a pair of induction coils or antennae;
- passing a spectrum of alternating current or voltage through a first of the induction coils or antennae;
- measuring a spectrum of alternating current or voltage produced in the second of the induction coils or antennae;
- and
- comparing the phase shift between the spectrum of alternating currents or voltages in the first and second induction coils or antennae, thereby determining the condition of the bulk tissue sample.
A method of determining changes in the condition of a bulk tissue sample over time, comprising:
- positioning a bulk tissue sample between a pair of induction coils or antennae;
- passing a spectrum of alternating current or voltage through a first of the induction coils or antennae;
- measuring a spectrum of alternating current or voltage produced in the second of the induction coils or antennae;
- and
- comparing the phase shift between the spectrum of alternating currents or voltages in the first and second induction coils or antennae over time, thereby determining a change in the condition of the bulk tissue sample over time.
An apparatus for determining the condition of a bulk tissue sample, comprising:
- a first induction coil or antenna;
- a second induction coil or antenna;
- an alternating current power supply connected to the first induction coil or antenna, the alternating current power supply configured to generate a spectrum of currents or voltages in the first induction coil or antenna;
- and
- a measurement system connected to the second induction coil or antenna, wherein the measurement system is configured to measure a phase shift difference in the spectrum of currents or voltages between the first and second induction coils or antennae when the first and second induction coils or antennae are positioned on opposite sides of a tissue sample.
-22. (canceled)
Dependencies are inferred from the claim text.