Photoacoustic monitoring technique with noise reduction
AssigneeCovidien LP
InventorsDongYel Kang, Youzhi Li, Qiaojian Huang, William Kit Dean
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Abstract
Various methods and systems for photoacoustic patient monitoring are provided. A photoacoustic system includes a light emitting component that emits one or more wavelengths of light into an interrogation region of a patient and an acoustic detector that detects acoustic energy generated by the interrogation region of the patient in response to the emitted light. The system also includes an optical detector that detects the emitted light and provides a signal that is used as an input to remove noise from the signal generated by the acoustic detector.
Claims20
A photoacoustic monitoring system, comprising:
- a memory storing instructions for:
- receiving a first signal from an acoustic detector configured to detect a photoacoustic effect from light emitted into a patient's tissue, wherein the first signal is representative of an indicator dilution;
- receiving a second signal from a photodetector configured to detect the light, wherein the first signal and the second signal include an overlapping time period;
- and
- determining a physiological parameter based at least in part on the first signal and the second signal;
- and
- a processor configured to execute the instructions.
A method, comprising:
- using a processor:
- receiving a first signal from an acoustic detector configured to detect a photoacoustic effect from light emitted into a patient's tissue;
- receiving a second signal from a photodetector configured to detect the light;
- correcting the first signal based on the second signal to generate a corrected first signal;
- and
- determining a physiological parameter based on the corrected first signal.
A photoacoustic sensor, comprising:
- a light emitting component configured to emit one or more wavelengths of light into a tissue of a patient;
- an acoustic detector configured to detect a photoacoustic effect from the light emitted into the patient's tissue;
- and
- an optical detector configured to detect the light scattering through the patient's tissue.
Dependencies are inferred from the claim text.