Abstract: In some aspects, a device wearable by a person includes a transducer configured to apply to the brain of the person acoustic signals.

Abstract: In some aspects, a device wearable by a person includes a sensor configured to detect a signal from the brain of the person and a transducer configured to apply to the brain an ultrasound signal. The ultrasound signal has a low power density and is substantially non-destructive with respect to tissue when applied to the brain.

Abstract: In some aspects, a device includes a sensor configured to detect a signal from the brain of the person and a plurality of transducers, each configured to apply to the brain an acoustic signal. One of the plurality of transducers is selected using a statistical model trained on data from prior signals detected from the brain.

Abstract: In some aspects, the described systems and methods provide for a method comprising transmitting, with at least one transducer, acoustic signals to a brain of a patient, wherein the at least one transducer is configured to induce excitation of a plurality of acoustic modes. The method further comprises receiving, with the at least one transducer, data acquired from the brain including information related to standing waves, frequency response, impulse/transient response, and/or distribution of acoustic modes. The method further comprises determining, from the acquired data, a location of a seizure site within the brain of the person.

Abstract: In some aspects, the described systems and methods provide for a method comprising transmitting to a brain of a patient, with at least one transducer, acoustic signals. The method further comprises receiving from the brain, with the at least one transducer, data acquired from the brain including information related to standing waves, distribution of acoustic modes, frequency response, and/or impulse/transient response. The method further comprises determining, from the acquired data, intracranial pressure of the person.

Abstract: In some aspects, the described systems and methods provide for a method comprising transmitting, with at least one transducer, acoustic signals to a brain of a patient, wherein the at least one transducer is configured to induce excitation of a plurality of acoustic modes. The method further comprises receiving, with the at least one transducer, data acquired from the brain including information related to standing waves, frequency response, impulse/transient response, and/or distribution of acoustic modes. The method further comprises determining, from the acquired data, a distribution of intracranial pressure within the brain of the person.

Abstract: In some aspects, the described systems and methods provide for a method comprising transmitting to a brain and/or skull of a patient, with at least one transducer, acoustic signals. The method further comprises receiving from the brain and/or skull, with the at least one transducer, data acquired from the brain and/or skull including information related to standing waves, guided waves, distribution of acoustic modes, frequency response, and/or impulse/transient response. The method further comprises determining, from the acquired data, presence of a tumor within the brain of the person.

Abstract: In some aspects, the described systems and methods provide for a method comprising transmitting to a brain of a patient, with at least one transducer, acoustic signals. The method further comprises receiving from the brain, with the at least one transducer, data acquired from the brain including information related to standing waves, distribution of acoustic modes, frequency response, and/or impulse/transient response. The method further comprises detecting, from the acquired data, a seizure of the person.

Abstract: In some aspects, the described systems and methods provide for a method comprising transmitting to a skull of a patient, with at least one transducer, acoustic signals. The method further comprises receiving from the skull, with the at least one transducer, data acquired from the skull including information related to guided waves, distribution of acoustic modes, frequency response, and/or impulse/transient response. The method further comprises determining, from the acquired data, intracranial pressure of the person.

Abstract: In some aspects, a closed-loop system for monitoring and/or treating brain function of a person includes a CMUT device that transmits ultrasound radiation to the brain of the person and receives and detects an ultrasound signal generated in the brain, and a processor that assesses the received ultrasound signal to determine brain function and controls further transmission of ultrasound radiation from the CMUT device based on the determined brain function.

Abstract: In some aspects, a sensor includes an optical transmitter that transmits to a brain of a person infrared radiation, and an acoustic receiver that detects an ultrasound signal generated in the brain in response to the infrared radiation. A processor determines oxygen saturation of the brain based on the detected ultrasound signal. The sensor may be included in a cap worn by the person, implanted under the skin of the person, or inserted through the nasal canal of the person.

Abstract: In some aspects, a device wearable by or attached to or implanted within a person includes a sensor configured to detect an electroencephalogram (EEG) signal from the brain of the person and a transducer configured to apply to the brain a low power, substantially non-destructive ultrasound signal.

Abstract: In some aspects, a device wearable by a person includes a transducer configured to apply to the brain of the person acoustic signals.

Abstract: In some aspects, a device includes a sensor configured to detect a signal from the brain of the person and a plurality of transducers, each configured to apply to the brain an acoustic signal. One of the plurality of transducers is selected using a statistical model trained on data from prior signals detected from the brain.

Abstract: In some aspects, a device includes a sensor configured to detect a signal from the brain of the person and a plurality of transducers, each configured to apply to the brain an acoustic signal. One of the plurality of transducers is selected using a statistical model trained on signal data annotated with one or more values relating to identifying a health condition.

Abstract: In some aspects, a device wearable by or attached to or implanted within a person includes a sensor configured to detect a signal from the brain of the person and a transducer configured to apply to the brain an acoustic signal.

Abstract: In some aspects, a device includes a sensor configured to detect a signal from the brain of the person and a first processor in communication with the sensor. The first processor is programmed to identify health condition and, based on the identified health condition, provide data from the signal to a second processor outside the device to corroborate or contradict the identified health condition.

Abstract: In some aspects, a device wearable by a person includes a sensor configured to detect a signal from the brain of the person and a transducer configured to apply to the brain an ultrasound signal. The ultrasound signal has a low power density and is substantially non-destructive with respect to tissue when applied to the brain.