50 results about "Magneto encephalography" patented technology

The invention relates to a children ASD diagnosis device based on a magnetoencephalogram and an electroencephalogram. The children ASD diagnosis device comprises a magnetic shielding system, a head-mounted electroencephalogram and magnetoencephalogram array type sensor system, an electroencephalogram and magnetoencephalogram data acquisition system, a sensory stimulation system, a signal processing system and a data analysis system. The magnetic shielding system can effectively reduce background magnetic field noise. The head-mounted electroencephalogram and magnetoencephalogram array type sensor system can carry out whole-brain collection on a tested child in a combined nesting mode. The electroencephalogram and magnetoencephalogram data acquisition system can record brain electrical activity information. The sensory stimulation system can present visual and auditory sensory stimulation for the tested child. The signal processing system removes biological magnetic noise and backgroundmagnetic noise. The data analysis system can extract pathological features in the signals for analysis. The children ASD diagnosis device provided by the invention has the advantages of high sensitivity and specificity, multiple information sources, high signal quality, easy acceptance by children and the like. The children ASD diagnosis device has the advantages of high sensitivity and specificity in the aspect of ASD diagnosis of children.

The invention discloses an epilepsy magnetoencephalogram spinous wave automatic detection method and a traceability positioning system. The method comprises the following steps: 1) segmenting magnetoencephalogram data of each sample to obtain a plurality of magnetoencephalogram data segments; wherein each magnetoencephalogram data segment is a data set in the form of a two-dimensional matrix withthe size of M * N; 2) training a magnetoencephalogram multi-view spine wave detection model by using the magnetoencephalogram data segment; 3) performing artifact removal operation on the magnetoencephalogram signal to be processed, and then segmenting magnetoencephalogram data to obtain a plurality of magnetoencephalogram data segments; 4) respectively inputting the obtained magnetoencephalogramdata fragments into the trained magnetoencephalogram multi-view ratchet detection model to obtain ratchet classification results corresponding to the magnetoencephalogram data fragments; and 5) determining whether the to-be-processed magnetoencephalogram signal has the ratchet wave or not according to the obtained ratchet wave classification result. According to the invention, the working processof a doctor is simplified, and the doctor can be effectively assisted in carrying out preoperative evaluation on an epilepsy patient.

A set of brain data representing a time series of neurophysiologic activity acquired by spatially distributed sensors arranged to detect neural signaling of a brain (such as by the use of magnetoencephalography) is obtained. The set of brain data is processed to obtain a dynamic brain model based on a set of statistically-independent temporal measures, such as partial cross correlations, among groupings of different time series within the set of brain data. The dynamic brain model represents interactions between neural populations of the brain occurring close in time, such as with zero lag, for example. The dynamic brain model can be analyzed to obtain the neurophysiologic assessment of the brain. Data processing techniques may be used to assess structural or neurochemical brain pathologies.

A visual stimulation presentation apparatus including: a specimen holding unit, made of a non-magnetic material, configured to hold multiple specimens of actual objects serving as specimens for presenting a subject with visual stimulation when running an apparatus to measure brain functions of the subject by detecting change in magnetic field; an actuator, made of a non-magnetic material, configured to selectively present multiple specimens of actual objects set in the specimen holding unit, by driving the specimen holding unit; and a control unit configured to control driving of the actuator; is used, whereby presenting time and presenting position can be precisely controlled and the delicate surface state of the objects with a high degree of sense of texture.

A collimator, and in particular a method for making a collimator for use with a small high resolution single-photon emission computed tomographic (SPECT) imaging tool for small animal research. The collimator is sized, both functionally and structurally, particularly smaller than known collimators and appropriately scaled to achieve a highly sensitive collimator which facilitates desired reconstruction resolutions for small animals, as well as compliments other functional imaging modalities such as positron emission tomography (PET), functional magnetic resonance imaging (fMRI), electroencephalography (EEG), and event-related potential (ERP), magneto-encephalography (MEG), and near-infrared optical imaging.

A magneto-encephalography device including a plurality of laser threshold magnetometers for measuring a magnetic field is provided. Each laser threshold magnetometer includes an optical cavity, a laser medium which together with the optical cavity has a laser threshold; a laser pump; and a radio-frequency (RF) drive applied to the laser medium at or around a particular resonance frequency which varies depending on the magnetic field, such that depending on the value of the physical parameter, the RF drive induces transitions between at least two states of the laser medium, each state causing a different laser threshold in an intensity of a laser output, wherein the intensity of the laser output provides a measurement of the magnitude of the magnetic field; wherein the laser threshold magnetometers are configured to be placed on a head of a subject to be monitored.

The invention provides a neural network-based magnetoencephalogram eye movement artifact detection and a elimination method and an electronic device. The method comprises the following steps: cuttinga to-be-detected magnetoencephalogram signal, and drawing a plurality of magnetoencephalogram signal views according to a signal segment and a magnetoencephalogram sensor detection signal position; extracting signal space distribution characteristics of the magnetoencephalogram, and classifying the signal space distribution characteristics; obtaining an eye movement signal interference segment according to a fixed ratio and the eye movement electrooculogram signal segment at the corresponding time point of the magnetoencephalogram signal segment containing the eye movement artifact noise signal; subtracting the magnetoencephalogram signal segment containing the eye movement artifact noise signal from the eye movement signal interference segment, and restoring the obtained signal segment with removed the eye movement artifact noise signal to a corresponding position. According to the invention, the electrooculogram signal measured by an electrode is not needed during detection, and themagnetoencephalogram signal that is not influenced by the electrooculogram signal is not interfered during elimination, so that the information in the original magnetoencephalogram signal can be reserved to the maximum extent.

Methods for screening for therapies against autism spectrum disorders and methods for determining whether a subject would be responsive to a therapy against an autism spectrum disorder are disclosed.

An array of optically pumped magnetometers includes a vapor cell arrangement having a wafer defining one or more cavities and alkali metal atoms disposed in the cavities to provide an alkali metal vapor; an array of light sources, each of the light sources arranged to illuminate a different portion of the one or more cavities of the vapor cell arrangement with light; at least one mirror arranged to reflect the light from the array of light sources after the light passes through the one or more cavities of the vapor cell arrangement; and an array of detectors to receive light reflected by the at least one mirror, wherein each of the detectors is arranged to receive light originating from one of the light sources.