EP4583782A1 - System und verfahren zur analyse von magnetischen signalen, die von einem menschlichen körper erzeugt werden - Google Patents
System und verfahren zur analyse von magnetischen signalen, die von einem menschlichen körper erzeugt werdenInfo
- Publication number
- EP4583782A1 EP4583782A1 EP23761103.3A EP23761103A EP4583782A1 EP 4583782 A1 EP4583782 A1 EP 4583782A1 EP 23761103 A EP23761103 A EP 23761103A EP 4583782 A1 EP4583782 A1 EP 4583782A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnetic signals
- human body
- magnetic
- longitudinal
- designed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/242—Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents
- A61B5/243—Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetocardiographic [MCG] signals
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6887—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient mounted on external non-worn devices, e.g. non-medical devices
- A61B5/6892—Mats
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7235—Details of waveform analysis
- A61B5/7264—Classification of physiological signals or data, e.g. using neural networks, statistical classifiers, expert systems or fuzzy systems
Definitions
- the present invention relates to a system and a method for analyzing magnetic signals generated by a human body.
- Magnetic fields which arise from the electrophysiological activity of neuronal or muscular tissue, can be recorded by various specialized sensor systems and in many cases serve as a diagnostic tool. This applies, among other things, to magnetoencephalography, as described, for example, in Pratt, E. J., Ledbetter, M., Jimenez-Martinez, R., Shapiro, B., Solon, A., Iwata, G. Z., ... & Alford, J. K. (2021, March). Kernel Flux: a whole-head 432-magnetometer optically-pumped magnetoencephalography (OP-MEG) system for brain activity imaging during natural human experiences. In Optical and Quantum Sensing and Precision Metrology (Vol. 11700, pp.
- the splitting of the energy levels results in changed transitions during relaxation from excited states, which can then be measured, for example, by optical excitation and frequency-dependent detection of the resulting fluorescent radiation or by observing optical properties such as the absorption of light.
- the magnetic field strength can then be deduced from the measured optical parameters.
- a system for analyzing magnetic signals generated by a human body comprises at least one measuring device for detecting magnetic signals, an evaluation unit which is set up to store the detected magnetic signals together with an assigned measurement time and longitudinal biomagnetic field data from the magnetic signals derive.
- the recorded magnetic signals and/or the longitudinal biomagnetic field data are compared with one another on different time scales, and based on the comparison, an assessment of a vital function of the human body can be carried out by the evaluation unit.
- Longitudinal biomagnetic field data should be understood to mean in particular data sets that describe the vital functions of a specific person recorded regularly over a longer period of time and which, by measuring magnetic signals generated by the person's body, to be discribed. These include, for example, the magnetic signals generated by the person's heart, but also signals generated by other muscles or nerves.
- the magnetic signals can be compared on a time scale of hours to days, with signs of right heart strain and/or increases in periods of tachycardic cardiac arrhythmias being particularly recognizable.
- the magnetic signals can be compared on a time scale of months to years, with long-term changes in the resting pulse and heart rate variability in particular being detectable.
- the system can preferably process vectorial measured values from several sensors or gradiometers for the evaluation, can more preferably carry out an assessment of the quality of the data (e.g. the signal-to-noise ratio), can further preferably combine the measured values with anonymized data from other users/benefits. compare channels, can also preferably include manual assessments of previous data in its assessment and can communicate with the user.
- the system can further preferably assess the urgency of a message to the user, relatives and other people and can further preferably weigh up the need to escalate the rescue chain (message on the device, notification of relatives, emergency call).
- the one measuring device for detecting magnetic signals is preferably designed to detect a magnetocardiogram (abbreviated MKG).
- An MKG is the recording and display of the heart's magnetic field, which is created by the electrophysiological activity of the heart muscle cells. This is achieved in particular using nitrogen void magnetometers (so-called NV magnetometers) as a measuring device.
- the measuring device comprises a sensor unit for detecting magnetic signals generated by a beating heart, which has a base body with a support surface and an arrangement of at least two NV magnetometer units, the arrangement being embedded in the base body, wherein the base body is designed to accommodate a user sitting or lying on the support surface.
- a sensor unit for detecting magnetic signals generated by a beating heart which has a base body with a support surface and an arrangement of at least two NV magnetometer units, the arrangement being embedded in the base body, wherein the base body is designed to accommodate a user sitting or lying on the support surface.
- a magnetocardiograph Such a device can also be called a magnetocardiograph.
- NV sensors have a very small active sensor volume (e.g. a few mm 3 ). This small design also enables the sensors to be used in a geometric arrangement. In particular, very high-resolution arrangements are possible due to the very small active sensor volume.
- the support body is a cushion, a mattress, a lounger, a mat, a bed, a seat (such as a car seat), or a chair; Integration is also possible in e.g. toppers, underlays, covers, slatted frames, bed frames, duvets, pillows, side sleeper pillows, etc.
- Diamond NV magnetometers are based on reading out the magnetic resonances of special defect centers in diamond, in particular nitrogen vacancies (NV), which occur as impurities in the carbon lattice of diamond and can also be introduced in a targeted manner.
- a suitable wavelength in this case in the green wavelength range, e.g. at 532nm for off-resonance excitation
- the magnetic field sensitivity is defined primarily by the minimally resolvable frequency shift and can reach up to 1 pTA/Hz or better.
- the NV center in a single-crystalline diamond has four ways of arranging itself in the crystal lattice.
- the NV centers present in the crystal react to the external magnetic field with different strengths depending on their location in the crystal. This means that, ideally, four pairs of fluorescence minima can appear in the spectrum, from whose shape and position relative to each other both the magnetic field strength as an amount and the direction of the external magnetic field can be clearly determined.
- the device has a device for generating a substantially homogeneous bias magnetic field in the area of the magnetometer units or their sensor media.
- the device can also be integrated into the base body.
- This can be a Helmholtz coil arrangement, with at least the sensor medium of the at least two NV magnetometer units being arranged within the Helmholtz coil arrangement. It can also be other devices such as a simple coil, an elongated coil, permanent magnet solutions such as in a Hallbach array, etc.
- Heart signals which are particularly preferably recorded as magnetic signals within the scope of the invention, have a magnetic signature at a distance of a few cm with an amplitude of (only) 1 to 2-digit picotesla (pT), whereas, for example, the earth's magnetic field in Central Europe is approx. 50 pT (microtesla), i.e. it is stronger by a factor of 10 6 .
- pT picotesla
- a magnetic shield or a gradiometer circuit can be used for this purpose.
- a gradiometer connection of at least two NV magnetometer units is used, one magnetometer unit is always at a greater distance from the heart (as a relatively weak magnetic field source) than another magnetometer unit. Due to the gradiometer connection, i.e. essentially (vectorial) subtraction of what is measured, the magnetic field gradient approximately corresponds to the field that emanates from the weak source, while significantly stronger background fields (which are essentially the same in both magnetometer units) are eliminated. This eliminates the need for magnetic shielding, making magnetic field measurement possible in everyday environments. The invention is particularly suitable for unshielded measurement of weak magnetic fields. Technical details of gradiometer solutions that can also be used within the scope of the present invention are disclosed in DE 102022201690.4 and should be included here.
- Figure 4 shows schematically an analysis of longitudinal biomagnetic field data on different time scales according to the invention.
- Figure 1 shows schematically a system 1 according to a possible embodiment of the invention.
- the evaluation unit 19 has a communication module 19. The system 1 can therefore use the biomagnetic field data 4 to derive a reasonable suspicion of a fault on different time scales and, if necessary, issue a warning 5 and/or initiate appropriate steps, for example by informing an emergency service 6.
- the light from the light source 120 can be irradiated into the diamond 110 via suitable optical elements 122 such as mirrors, beam splitters, focusing optics such as lenses and, if necessary, via fiber optic elements.
- the excitation light can be irradiated by the laser continuously or in pulses, so that, for example, time windows are kept free for interference-free fluorescent light measurement.
- the magnetometer may include a microwave source 150 capable of generating an electromagnetic field across a bandwidth covering the desired resonant frequency in the sensor medium, ie, in the region of the NV centers of the diamond 110.
- a microwave resonator structure may can be used to homogeneously distribute the generated microwaves over the volume of the measuring area in the diamond.
- the curves 62, 64, 66 of a respective magnetic signal recorded for three different people during the same period of time are shown between a value 63, 65, 67 derived therefrom, which represents, for example, sleep quality. It is noticeable that on day 72, a decrease in the recorded value was noted in all people. This can be explained, for example, by a specific weather event (e.g. midsummer night) if the people were in the same region. This can be verified by including other sources of information (weather services, Internet, etc.) and taken into account in the further evaluation of the magnetic signals.
- a specific weather event e.g. midsummer night
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Biophysics (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Surgery (AREA)
- Molecular Biology (AREA)
- Medical Informatics (AREA)
- Heart & Thoracic Surgery (AREA)
- Pathology (AREA)
- Biomedical Technology (AREA)
- Artificial Intelligence (AREA)
- Evolutionary Computation (AREA)
- Signal Processing (AREA)
- Psychiatry (AREA)
- Physiology (AREA)
- Mathematical Physics (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Fuzzy Systems (AREA)
- Cardiology (AREA)
- Measuring Magnetic Variables (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022209442.5A DE102022209442A1 (de) | 2022-09-09 | 2022-09-09 | System und Verfahren zur Analyse von magnetischen Signalen, die von einem menschlichen Körper erzeugt werden |
| PCT/EP2023/072847 WO2024052090A1 (de) | 2022-09-09 | 2023-08-18 | System und verfahren zur analyse von magnetischen signalen, die von einem menschlichen körper erzeugt werden |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4583782A1 true EP4583782A1 (de) | 2025-07-16 |
Family
ID=87801176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23761103.3A Pending EP4583782A1 (de) | 2022-09-09 | 2023-08-18 | System und verfahren zur analyse von magnetischen signalen, die von einem menschlichen körper erzeugt werden |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4583782A1 (de) |
| KR (1) | KR20250065850A (de) |
| CN (1) | CN119836265A (de) |
| DE (1) | DE102022209442A1 (de) |
| WO (1) | WO2024052090A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7485095B2 (en) * | 2000-05-30 | 2009-02-03 | Vladimir Shusterman | Measurement and analysis of trends in physiological and/or health data |
| WO2008005513A2 (en) * | 2006-07-06 | 2008-01-10 | Regents Of The University Of Minnesota | Analysis of brain patterns using temporal measures |
| US20140000630A1 (en) * | 2012-06-29 | 2014-01-02 | John P. Ford | Magnetic Imaging Device To Inventory Human Brain Cortical Function |
| GB2580931A (en) * | 2019-01-30 | 2020-08-05 | Univ Warwick | Defect centre-based sensor |
| US20220015667A1 (en) * | 2020-07-20 | 2022-01-20 | Samantha Kurkowski | Systems and methods for obtaining and monitoring respiration, cardiac function, and other health data from physical input |
| DE102022201690A1 (de) | 2022-02-18 | 2023-08-24 | Robert Bosch Gesellschaft mit beschränkter Haftung | Sensoreinheit zur Messung von Magnetfeldern |
| DE102022204526A1 (de) | 2022-05-09 | 2023-11-09 | Robert Bosch Gesellschaft mit beschränkter Haftung | Magnetfeldsensor auf Basis von Spinresonanzen |
-
2022
- 2022-09-09 DE DE102022209442.5A patent/DE102022209442A1/de active Pending
-
2023
- 2023-08-18 WO PCT/EP2023/072847 patent/WO2024052090A1/de not_active Ceased
- 2023-08-18 KR KR1020257010864A patent/KR20250065850A/ko active Pending
- 2023-08-18 EP EP23761103.3A patent/EP4583782A1/de active Pending
- 2023-08-18 CN CN202380064475.4A patent/CN119836265A/zh active Pending
Non-Patent Citations (1)
| Title |
|---|
| STÜRNER FELIX M. ET AL: "Integrated and Portable Magnetometer Based on Nitrogen-Vacancy Ensembles in Diamond", ADVANCED QUANTUM TECHNOLOGIES, vol. 4, no. 4, 10 February 2021 (2021-02-10), pages 2000111, XP055936395, ISSN: 2511-9044, Retrieved from the Internet <URL:https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qute.202000111> DOI: 10.1002/qute.202000111 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024052090A1 (de) | 2024-03-14 |
| KR20250065850A (ko) | 2025-05-13 |
| DE102022209442A1 (de) | 2024-03-14 |
| CN119836265A (zh) | 2025-04-15 |
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