Enhanced stethoscope device and methods
An enhanced stethoscope device and method for operating the enhanced stethoscope are provided. The enhanced stethoscope device generally operates by providing stethoscope sensors, ultrasonic sensors, and other sensors to obtain a series of measurements about a subject. The series of measurements may be correlated, such as by machine learning, to extract clinically relevant information. Also described are systems and methods for ultrasonic beamsteering by interference of an audio signal with an ultrasonic signal.
1. A blood pressure measurement device comprising:
an ultrasonic transducer for transmitting a transmitted ultrasonic imaging signal to a blood vessel and receiving a received ultrasonic imaging signal from the blood vessel; and
an audio transducer for transmitting an audio signal to the blood vessel, wherein the audio signal is configured to interfere with the received ultrasonic imaging signal based on a model of the blood vessel response to the audio signal, and wherein the model correlates the received ultrasonic imaging signal with the audio signal to generate a blood pressure measurement.
2. The device of claim 1 , wherein the model correlates the received ultrasonic imaging signal with the audio signal by:
i) convolving the received ultrasonic imaging signal with a first weighting function to form a weighted ultrasonic imaging signal;
ii) convolving the audio signal with a second weighting function to form a weighted audio signal; and
iii) performing auto-correlation or cross-correlation on the weighted ultrasonic imaging signal and the weighted audio signal to generate the blood pressure measurement.
3. The device of claim 1 , wherein the transmitted ultrasonic imaging signal has a frequency within a range of about 100 kHz to 11 MHz.
4. The device of claim 1 , wherein the audio transducer is a speaker.
5. The device of claim 1 , further comprising a housing coupled to the ultrasonic transducer and the audio transducer.
6. The device of claim 5 , wherein either the ultrasonic transducer, the audio transducer, or both are detachably coupled to the housing.
7. The device of claim 1 , further comprising a user interface for operating the device.
8. The device of claim 7 , wherein the user interface comprises a display.
9. The device of claim 1 , further comprising a signal processing unit.
10. The device of claim 9 , wherein the signal processing unit outputs a signal processed measurement to a single-pixel feature extraction unit.
11. The device of claim 10 , wherein the signal processing unit further outputs the signal processed measurement to an image processing unit.
12. The device of claim 1 , further comprising a wireless networking modality.
13. The device of claim 12 , wherein the wireless networking modality is configured to communicate the audio signal, the received ultrasonic imaging signal, or both, to a peripheral device.
14. The device of claim 13 , wherein the wireless networking modality is configured to communicate a frequency of the audio signal to the peripheral device.
15. The device of claim 1 , wherein the audio signal has a frequency within a range of about 0.01 Hz to 3 kHz.