A system is provided for displaying heart graphic information relating to sources and source locations of a heart disorder to assist in evaluation of the heart disorder. A heart graphic display system provides an intra-cardiogram similarity (ICS) graphic and a source location (SL) graphic. The ICS graphic includes a grid with the x-axis and y-axis representing patient cycles of a patient cardiogram with the intersections of the patient cycle identifiers indicating similarity between the patient cycles. The SL graphic provides a representation of a heart with source locations indicated. The source locations are identified based on similarity of a patient cycle to library cycles of a library cardiogram of a library of cardiograms.

According to an aspect, there is provided a stethoscope apparatus stethoscope apparatus, the stethoscope apparatus comprising a sound sensor for measuring sounds produced by the breathing of a subject and for outputting a sound signal representing the measured breathing sounds; an antenna for receiving a modulated electromagnetic signal from the body, wherein the modulated electromagnetic signal is modulated by movement of air, fluid and/or tissue in the body; a processing unit that is configured to receive the sound signal from the sound sensor and the modulated electromagnetic signal from the antenna; and normalise the sound signal using the modulated electromagnetic signal.

Some embodiments described herein relate to a method that includes defining an electro-anatomical model of a heart. The electro-anatomical model can include conduction patterns for multiple patterns or phases identified by a measurement instrument. The electro-anatomical model can also include a voltage map of the heart. A portion of the heart containing a rotor can be identified based on circulation in one phase of the model. The rotor can be determined to be stable based on that portion of the heart having circulation in another phase of the model. The rotor can be characterized as a substrate rotor based on the rotor being stable and based on the voltage or a change in voltage at the portion of the heart containing the rotor. The rotor can be treated or ablated when the rotor is determined to be a substrate rotor.

A highly precise, and simple and easy calibration function of a magnetocardiographic measurement apparatus is provided. A magnetocardiographic measurement apparatus includes: a magnetic sensor array; and a magnetic field acquiring unit acquiring environmental magnetic field measurement data measured by the array in response to the array being turned such that the array faces a plurality of directions in an environmental magnetic field; a calibration parameter calculating unit using the environmental magnetic field measurement data to calculate a calibration parameter for calibrating measurement data measured by the array in magnetocardiographic measurement of a subject; a calibration parameter storage unit storing the calibration parameter; a calibration calculating unit using the calibration parameter to calibrate the measurement data; and a data output unit outputting the measurement data. The array has a plurality of magnetic sensor cells arrayed three-dimensionally, and each capable of sensing a magnetic field in three axial directions.

The gradiometers of the present invention are developed by applying GSR sensors to have the detectability of magnetic field same to that of SQUID without a cryogenic temperature retainer. Plural GSR elements are fitted on two parallel convex line guides of the gradiometer board using two parallel concave line guides of the GSR element board to keep the parallel among wires direction of GSR elements perfectly and to cancel the outside magnetic field noise without a magnetic shield room.

A biological signal processing system includes a segment identification unit configured to identify a segment including a time point of a processing target with respect to a biological signal whose period is divided into a plurality of segments in time, a processing control unit configured to select a processing method of processing the biological signal at the time point of the processing target on the basis of the segment identified by the segment identification unit, and a process execution unit configured to execute a process for the biological signal in the processing method selected by the processing control unit.

A pulse sensor is capable of measuring a pulse rate of a wearer at a peripheral artery. In an embodiment, the pulse sensor includes a magnet supported to move responsive to an arterial pulse and a magnetometer configured to detect changes in a magnetic field produced by the magnet. The magnet may include a plurality of ferromagnetic particles disposed in or on a flexible substrate configured to be held adjacent to human skin subject to arterial palpation and a magnetic sensor configured to sense movement of the ferromagnetic particles. A system and method may measure hydration includes using a pulse sensor to measure pulse rate and modulation. The wearer is prompted when the pulse rate and pulse modulation indicate a response to dehydration of the wearer.

A pulse sensor is capable of measuring a pulse rate of a wearer at a peripheral artery. In an embodiment, the pulse sensor includes a magnet supported to move responsive to an arterial pulse and a magnetometer configured to detect changes in a magnetic field produced by the magnet. The magnet may include a plurality of ferromagnetic particles disposed in or on a flexible substrate configured to be held adjacent to human skin subject to arterial palpation and a magnetic sensor configured to sense movement of the ferromagnetic particles. A system and method may measure hydration includes using a pulse sensor to measure pulse rate and modulation. The wearer is prompted when the pulse rate and pulse modulation indicate a response to dehydration of the wearer.

The present invention discloses a method for noninvasive imaging of cardiac electrophysiological based on low rank and sparse constraints. This method decomposes the spatio-temporal distribution of endocardial and epicardial potentials into a low-rank matrix representing smooth potential components and a sparse matrix representing the details of potential salience according to the prior condition of spatio-temporal correlation of the endocardial and epicardial potential distribution of the heart. By introducing low rank and sparse constraints, the solution of the ill-conditioned inverse problem of ECG is constrained to the unique optimal solution. The invention combines the individualized three-dimensional heart model of the subject to obtain a three-dimensional dynamic distribution image of the cardiac endocardial and epicardial potential of the subject, which has important practical application value.

A biomagnetic field measuring apparatus enabling reliable biomagnetic field measurements in clinical practice, having a plurality of magnetic field sensors being arranged in an array in a sensor plane, including a plurality of first magnetic field sensors being designed and configured to measure a first component of the magnetic field, a plurality of second magnetic field sensors being designed and configured to measure a second component of the magnetic field, and a plurality of third magnetic field sensors being designed and configured to measure a third component of the magnetic field, the first, second and third components of the magnetic field being orthogonal to each other. Viewed perpendicular to the sensor plane, the first magnetic field sensors and the second magnetic field sensors are arranged essentially centrally and the third magnetic field sensors are arranged essentially around the first and second magnetic field sensors.