CN111000549A - Magnetocardiogram measuring system - Google Patents
Magnetocardiogram measuring system Download PDFInfo
- Publication number
- CN111000549A CN111000549A CN201911389353.4A CN201911389353A CN111000549A CN 111000549 A CN111000549 A CN 111000549A CN 201911389353 A CN201911389353 A CN 201911389353A CN 111000549 A CN111000549 A CN 111000549A
- Authority
- CN
- China
- Prior art keywords
- magnetic field
- magnetic
- signal
- measurement system
- measurement
- 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
Images
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
- A61B2576/00—Medical imaging apparatus involving image processing or analysis
- A61B2576/02—Medical imaging apparatus involving image processing or analysis specially adapted for a particular organ or body part
- A61B2576/023—Medical imaging apparatus involving image processing or analysis specially adapted for a particular organ or body part for the heart
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Cardiology (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
The invention provides a magnetocardiogram measuring system, comprising: the detection element comprises a TMR magnetic resistance probe; the data acquisition and analysis unit is connected with the detection piece and is used for acquiring the signal detected by the detection piece and analyzing the detected signal; a magnetic field generating system for generating a predetermined magnetic field value; the magnetic field shielding system is connected with the magnetic field generating system so as to shield an external magnetic field through the magnetic field shielding system; and has auxiliary detection equipment to compare with the magnetocardiogram measurement result provided by the invention. By the technical scheme provided by the invention, the technical problem of high cost of the magnetocardiogram measuring system in the prior art can be solved.
Description
Technical Field
The invention relates to the technical field of magnetocardiogram measurement, in particular to a magnetocardiogram measurement system.
Background
Currently, in magnetocardiogram measurement systems for cardiac diseases such as arrhythmia and myocardial ischemia, all magnetocardiogram detection devices are based on Superconducting Quantum Interference devices (SQUIDs).
However, SQUID magnetometers are bulky and require liquid helium or liquid nitrogen for cooling, which is expensive, thus making SQUID magnetometers only incorporated in limited research institutions such as large hospitals and universities.
Disclosure of Invention
The invention mainly aims to provide a magnetocardiogram measuring system, which aims to solve the technical problem that the magnetocardiogram measuring system in the prior art is high in cost.
In order to achieve the above object, the present invention provides a magnetocardiogram measuring system, including:
the detection element comprises a TMR magnetic resistance probe;
the data acquisition and analysis unit is connected with the detection piece and is used for acquiring the signal detected by the detection piece and analyzing the detected signal;
a magnetic field generating system for generating a predetermined magnetic field value;
the magnetic field shielding system is connected with the magnetic field generating system so as to shield an external magnetic field through the magnetic field shielding system;
the auxiliary detection equipment comprises conventional electrocardio measurement equipment and the like, and is used for comparing with a magnetocardiogram detection result of the magnetocardiogram measurement system.
Further, the TMR magnetoresistive probe includes a TMR magnetoresistive sensor, a primary signal method circuit, a signal filter circuit, and a compensation circuit, the TMR sensor being connected to the signal processing circuit (i.e., the primary signal method circuit, the signal filter circuit, and the compensation circuit) by a cable.
Further, the detection piece still includes: and the detection array unit processes the data of the array unit, designs the spatial layout, and makes a difference on the output value to eliminate the external low-frequency noise interference. The characteristics of the differential signal are further analyzed, and the magnetocardiogram signal and the environmental noise characteristics are combined, so that the measurement error caused by the inconsistency of the sensor and the internal incoherent noise is improved, and the measurement precision is improved.
Further, the detection array unit is in an 8-by-8 array structure.
Furthermore, the size of the detection array unit is less than or equal to 20 × 20cm2。
Furthermore, the data acquisition and analysis unit comprises a multi-channel data acquisition module, a digital-to-analog conversion module, a data analysis and storage module and a magnetocardiogram signal display module, wherein the TMR magnetoresistive probe data is output to the magnetocardiogram signal display module through the multi-channel data acquisition module and the digital-to-analog conversion and analysis module.
Furthermore, the magnetic field generation system comprises a three-position equal-diameter Helmholtz coil, a current source and a magnetic field generation control system, wherein the current source supplies power to the magnetic field generation system, and the coil and the magnetic field generation control system monitor and control the generated magnetic field in real time.
Further, magnetic field shielding system includes magnetic shield cover and nonmagnetic removal test bed, and the movable setting of nonmagnetic removal test bed to detect the piece and transport to the magnetic shield cover ground through nonmagnetic removal test bed and shield in the interval.
Further, the magnetic shield includes a protective inner shell, an intermediate interlayer and a protective outer shell, the intermediate interlayer being disposed between the protective inner shell and the protective outer shell, the protective outer shell being made of an aluminum material, the intermediate interlayer including a plurality of layers of permalloy plates.
Further, the interlayer comprised 5 permalloy plates.
Further, the magnetic shield includes a main body portion and an end cap detachably provided on the main body portion.
Further, the magnetic field shielding system further comprises a nonmagnetic testing substrate, the nonmagnetic testing substrate is arranged on the nonmagnetic moving bed, and a clamping groove is formed in the magnetic shielding cover, so that the nonmagnetic testing substrate is conveyed to the shielding area of the magnetic shielding cover through the nonmagnetic moving bed, and the nonmagnetic testing substrate is clamped into the clamping groove.
Furthermore, the nonmagnetic moving bed comprises a support frame and a support plate, the support plate is arranged on the support frame, and the support plate is used for supporting the object to be detected; along the extending direction of support frame, the movably setting of backup pad is on the support frame.
Furthermore, the nonmagnetic moving bed further comprises a driving mechanism, the driving mechanism is arranged on the supporting frame, and the driving end of the driving mechanism is connected with the supporting plate so as to drive the supporting plate to move through the driving end of the driving mechanism.
Furthermore, the driving mechanism comprises a worm wheel, a worm and an operating handle, the operating handle is connected with the worm wheel, the worm wheel drives the worm to move, and the worm is in driving connection with the supporting plate.
By applying the technical scheme of the invention, the detection element in the invention consists of the TMR magneto-resistance probe, and the magneto-resistance probe has lower cost and smaller volume compared with the detection probe of the SQUID magnetocardiograph. Therefore, the magnetocardiogram measuring system provided by the invention can reduce the production cost, reduce the occupied volume and is convenient to carry and use.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a schematic view of an embodiment of a human body test according to the invention;
FIG. 2 shows a schematic of a magnetocardiogram signal processing flow;
FIG. 3 is a schematic diagram showing the structure of a magnetocardiogram acquisition process;
FIG. 4 shows a magnetocardiogram signal processing partial circuit diagram;
FIG. 5 shows a schematic diagram of a magnetic field generating system;
fig. 6 shows a schematic view of a nonmagnetic moving bed structure.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in the figure, an embodiment of the present invention provides a magnetocardiogram measuring system, which includes a detecting element, a data collecting and analyzing unit, a magnetic field generating system, a magnetic field shielding system, and an auxiliary detecting device. As shown in fig. 3, the magnetocardiogram collection process is schematically illustrated, the detecting element includes a TMR magnetoresistive probe, the data collection and analysis unit is connected to the detecting element, and the data collection and analysis unit is configured to collect and analyze a signal detected by the detecting element. The magnetic field shielding system is connected with the magnetic field generating system so as to shield an external magnetic field through the magnetic field shielding system; and the auxiliary detection equipment comprises conventional electrocardio measuring equipment and the like so as to compare with the magnetocardiogram detection result.
In the embodiment, the TMR magnetoresistive probe is a core unit for performing magnetocardiogram detection, and the TMR magnetoresistive sensor can sense the magnitude of a magnetic field in the pitter (pT) order and has high sensitivity. The magnitude of the magnetic field emitted by the human heart is about 100pT, and the detection of magnetic field signals of this magnitude requires a detection circuit capable of realizing high-sensitivity and low-noise measurement. The noise is suppressed to be less than 20pT by means of filter circuit design, feedback control, low-noise component selection, optimized wiring and the like, and the magnetic field change of less than 10pT can be sensed. Adopt the magnetocardiogram measurement system that this embodiment provided, compare the magnetocardiogram appearance among the prior art, magnetocardiogram measurement system in this application is owing to adopted the TMR magnetic resistance probe, and this TMR magnetic resistance probe's cost is lower, and it is less to occupy the volume, therefore can be to a great extent lower whole magnetocardiogram measurement system's cost, simultaneously, through reducing magnetocardiogram measurement system's occupation volume also be convenient for operate. The magnetocardiogram measuring system provided by the embodiment can be used for conveniently reducing the cost of the human body magnetocardiogram detecting process.
Specifically, the TMR magnetoresistive probe in this embodiment includes a TMR magnetoresistive sensor, a primary signal amplifier circuit, a signal filter circuit, and a compensation circuit, the TMR sensor is connected to the signal processing circuit diagram through a cable, fig. 4 shows a magnetocardiogram signal processing local circuit diagram, the design and layout of the optimization circuit, data collected by the TMR chip are output finally through some column operations such as amplification, filtering, differential gain, and the like, and high-precision magnetocardiogram data are extracted using the design circuit. Specifically, based on the idea of differential measurement, geomagnetic signals and environmental noise are removed, after output signals of the multiple magnetic sensing devices are obtained by an instrument amplifier, signal differentiation is performed after the output signals are amplified in a fine adjustment stage, difference signals are filtered, main-stage amplification is performed, data processing is performed, and finally analysis data are output. Taking TMR data processing as an example, a typical reference circuit diagram: TMR output signals are synchronously output in two paths, one path is sent to an output terminal J3 (wool output is used for establishing a mathematical model subsequently, and calculation errors are used as references); the other path of the signal is output to an input pin of an AD8221 chip, VS + and VS-capacitors are both 0.1uF, and a regulating resistor R2 is reserved; the output signal processed by AD8221 is output to the input end of AD8606 through a resistor R6, a 2k omega potentiometer is adopted in the gain fine adjustment link to fine adjust the gain of 0-2 times, R7 and R500 omega are added to serve as balance resistors, and the subsequent differential link is designed to be differential and amplified by 10 times. And then high-pass filtering is carried out, and then low-pass filtering is carried out. The capacitance in the circuit is determined by testing and adjusting through experiments, and enough space is reserved during wiring. And finally, two stages of main amplification are carried out, wherein the two stages of main amplification use adjustable amplification with the upper limit of 100 times and use a potentiometer of 100k omega for adjustment. The positive and negative power supplies of each element are each provided with a 0.1 muF capacitor for filtering.
In this embodiment, the detecting element further comprises a detecting array unit, and the same TMR detecting unit forms the detecting array unit, and performs data acquisition through the data acquisition unit;
specifically, the detection array unit in this embodiment is an 8 × 8 array structure. Through experimental verification, the array unit is adopted, so that the precision of a magnetocardiogram detection result is improved;
in this embodiment, the size of the detection array unit is less than or equal to 20 × 20cm2. The detection array unit in the embodiment has expandable function. The size of the detection array is preliminarily set by referring to the area of the chest cavity of the human body. And further optimization processing of subsequent detection data processing is considered, and the detection array reserves an expansion interface and has an expandable function.
In this embodiment, the data acquisition and analysis unit includes a multi-channel data acquisition module, a digital-to-analog conversion module, a data analysis and storage module, and a magnetocardiogram signal display module. TMR detection array data passes through the data acquisition module, the data conversion module and the data analysis storage module and is output to the magnetocardiogram signal display terminal. By adopting the data acquisition and analysis unit provided in the embodiment, not only can the real-time data of the magnetocardiogram detection array unit be synchronously acquired, but also the output data of the auxiliary detection equipment can be synchronously acquired and processed, and the simultaneous display and output of various signal processing results can be realized for comparison and analysis.
Specifically, the magnetic field generation system in this embodiment (fig. 5 is a schematic view of the composition of the magnetic field generation system) includes a three-position equal-diameter helmholtz coil, a current source, and a magnetic field generation control system, where the current source supplies power to the magnetic field generation system, and the coil and the magnetic field generation control system monitor and control the generated magnetic field in real time.
In this embodiment, the magnetic shielding system includes a magnetic shielding cover and a nonmagnetic movable test bed, and the nonmagnetic movable test bed is movably disposed to convey the object to be detected to a shielding area of the magnetic shielding cover through the nonmagnetic movable test bed. By adopting the arrangement, the movable test bed can conveniently convey the part to be detected to the shielding region by moving the nonmagnetic movable test bed, is convenient to operate, and improves the convenience of use. Specifically, the object to be detected here is mainly a human body.
Specifically, the magnetic shield in this embodiment includes a protective inner shell, an intermediate interlayer disposed between the protective inner shell and the protective outer shell, and the protective outer shell is made of an aluminum material, and the intermediate interlayer includes a plurality of layers of permalloy plates. By adopting the arrangement, the shielding effect on the external magnetic field can be better played, so that the influence of the external magnetic field on the magnetic field of the internal part to be detected is avoided.
In order to further improve the magnetic shielding effect, the interlayer in this embodiment comprises 5 permalloy plates, and the maximum magnetic shielding effect can reach 0.1 nT.
In order to improve the convenience of operation, the magnetic shield in this embodiment includes a main body portion and an end cap, and the end cap is detachably provided on the main body portion. Specifically, the magnetic shield in this embodiment includes two end covers, and two end covers set up in the both ends of main part relatively, and two end covers all detachably set up on the main part to experimental operation is convenient for.
In this embodiment, the magnetic field shielding system further includes a nonmagnetic test substrate disposed on the nonmagnetic moving bed, and the magnetic shield is provided with a clamping groove to transport the nonmagnetic test substrate into the shielding region of the magnetic shield through the nonmagnetic moving bed, and to clamp the nonmagnetic test substrate into the clamping groove. By adopting the arrangement, the nonmagnetic test substrate can be conveniently fixed on the magnetic shield through the nonmagnetic moving bed, so that the nonmagnetic test substrate can be better subjected to magnetic shielding on the upper ground to be detected, the nonmagnetic moving bed can be withdrawn from the underground of the magnetic shield after the nonmagnetic test substrate is fixed on the magnetic shield, the influence of the nonmagnetic moving bed on the geomagnetic field of the detected part can be better reduced, the ground detection accuracy can be better improved, and the ground detection accuracy can be guaranteed. Meanwhile, the geomagnetic field shielding system in the embodiment is simple in structure and low in cost.
Specifically, the nonmagnetic moving bed in the embodiment comprises a support frame and a support plate, wherein the support plate is arranged on the support frame, and the support plate is used for supporting the object to be detected. Along the extending direction of support frame, the movably setting of backup pad is on the support frame. Specifically, the support member in the present embodiment extends in the vertical direction. The support frame is two, and two support frame intervals set up, and the backup pad setting is on two support frames to support the backup pad through two support frames. The end part of the support frame far away from the support plate is provided with a roller which is convenient for the support frame to be movably arranged through a rolling path.
In this embodiment, the nonmagnetic moving bed further comprises a driving mechanism, the driving mechanism is arranged on the support frame, and the driving end of the driving mechanism is connected with the support plate so as to drive the support plate to move through the driving end of the driving mechanism. The arrangement is adopted, so that the height of the supporting plate can be better adjusted according to actual conditions, and the nonmagnetic test substrate can be better sent into the magnetic shielding cover.
Specifically, actuating mechanism includes worm wheel, worm and operating handle, and operating handle is connected with the worm wheel, and the worm wheel drives the worm motion, and the worm is connected with the backup pad drive. By adopting the arrangement, only the operating handle needs to be operated, the operating handle drives the worm wheel to rotate, the worm wheel drives the worm to move, and the worm drives the supporting plate to move up and down.
In order to better guide the movement of the support plate, the nonmagnetic moving bed in this embodiment further includes a guide rail extending in the extending direction of the support frame, specifically, the guide rail extends in the vertical direction. The support plate is movably disposed on the guide rail to guide the support plate to move through the guide rail to prevent the support plate from shifting in movement.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the cost of human body magnetocardiogram detection is reduced, the convenient and low-cost detection for cardiac diseases such as arrhythmia and myocardial ischemia is improved, and a method for detecting weak magnetocardiogram signals in a magnetic shielding environment is formed through the research and development of technologies such as magnetic shielding, differential detection and signal filtering; the system has the characteristics of miniaturization, high precision, flexible conversion and high spatial resolution, saves the cost of the conventional magnetocardiogram detection system equipment, and can basically meet the requirement of clinical magnetocardiogram signal detection.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911389353.4A CN111000549A (en) | 2019-12-30 | 2019-12-30 | Magnetocardiogram measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911389353.4A CN111000549A (en) | 2019-12-30 | 2019-12-30 | Magnetocardiogram measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111000549A true CN111000549A (en) | 2020-04-14 |
Family
ID=70118288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911389353.4A Pending CN111000549A (en) | 2019-12-30 | 2019-12-30 | Magnetocardiogram measuring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111000549A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111973172A (en) * | 2020-08-28 | 2020-11-24 | 北京航空航天大学 | Cardiac structure imaging system and method based on MCG and ECG fusion |
| CN112089417A (en) * | 2020-09-23 | 2020-12-18 | 北京昆迈医疗科技有限公司 | Ridge magnetic map system, ridge magnetic map processing method and ridge magnetic map processing device |
| CN114325127A (en) * | 2021-12-31 | 2022-04-12 | 华中科技大学 | Power frequency electromagnetic wave detection device and method with directivity |
| WO2023133184A1 (en) * | 2022-01-05 | 2023-07-13 | Tdk U.S.A. Corporation | Methods and devices for electromagnetic measurements from ear cavity |
| CN117289187A (en) * | 2023-11-27 | 2023-12-26 | 之江实验室 | Magnetic signal acquisition system |
| CN118177812A (en) * | 2024-05-15 | 2024-06-14 | 之江实验室 | System, method and storage medium for collecting magnetic cardiotonic signals and ballistocardiographic signals |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090326399A1 (en) * | 2006-04-26 | 2009-12-31 | Advancare, S.L. | Magnetic field sensor, system and method for detecting the heart beat rate of a person in a vehicle, and system and method for detecting fatigue |
| CN103188992A (en) * | 2010-09-10 | 2013-07-03 | 柯尼卡美能达先进多层薄膜株式会社 | Biomagnetism measuring device, biomagnetism measuring system, and biomagnetism measuring method |
| US20140062472A1 (en) * | 2011-05-20 | 2014-03-06 | Konica Minolta, Inc. | Magnetic sensor and biomagnetism measurement system |
| CN105640552A (en) * | 2014-12-02 | 2016-06-08 | 精工爱普生株式会社 | Magnetic field measurement method and magnetic field measurement apparatus |
| CN106054089A (en) * | 2015-04-06 | 2016-10-26 | 精工爱普生株式会社 | Magnetism detection sensor and magnetism measurement apparatus |
| CN106236012A (en) * | 2015-06-09 | 2016-12-21 | 精工爱普生株式会社 | Magnetic field measuring device and magnetic field measuring method |
| CN108024755A (en) * | 2015-09-10 | 2018-05-11 | 株式会社理光 | magnetic measuring device |
| JP2019010483A (en) * | 2017-07-03 | 2019-01-24 | 株式会社日立ハイテクノロジーズ | Magnetic field measurement apparatus and measurement magnetic field display method |
| US20190046059A1 (en) * | 2017-08-09 | 2019-02-14 | Genetesis Llc | Biomagnetic detection |
| JP2019171019A (en) * | 2018-03-28 | 2019-10-10 | 旭化成エレクトロニクス株式会社 | Magnetocardiograph measurement device, calibration method, and calibration program |
| CN110325108A (en) * | 2017-08-18 | 2019-10-11 | 克里沃医疗技术有限公司 | Signal Processing in Medical Magnetometers |
| US20190377035A1 (en) * | 2018-06-08 | 2019-12-12 | Asahi Kasei Microdevices Corporation | Magnetic field measurement apparatus, magnetic field measurement method, and storage medium with magnetic field measurement program stored thereon |
-
2019
- 2019-12-30 CN CN201911389353.4A patent/CN111000549A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090326399A1 (en) * | 2006-04-26 | 2009-12-31 | Advancare, S.L. | Magnetic field sensor, system and method for detecting the heart beat rate of a person in a vehicle, and system and method for detecting fatigue |
| CN103188992A (en) * | 2010-09-10 | 2013-07-03 | 柯尼卡美能达先进多层薄膜株式会社 | Biomagnetism measuring device, biomagnetism measuring system, and biomagnetism measuring method |
| US20140062472A1 (en) * | 2011-05-20 | 2014-03-06 | Konica Minolta, Inc. | Magnetic sensor and biomagnetism measurement system |
| CN105640552A (en) * | 2014-12-02 | 2016-06-08 | 精工爱普生株式会社 | Magnetic field measurement method and magnetic field measurement apparatus |
| CN106054089A (en) * | 2015-04-06 | 2016-10-26 | 精工爱普生株式会社 | Magnetism detection sensor and magnetism measurement apparatus |
| CN106236012A (en) * | 2015-06-09 | 2016-12-21 | 精工爱普生株式会社 | Magnetic field measuring device and magnetic field measuring method |
| CN108024755A (en) * | 2015-09-10 | 2018-05-11 | 株式会社理光 | magnetic measuring device |
| JP2019010483A (en) * | 2017-07-03 | 2019-01-24 | 株式会社日立ハイテクノロジーズ | Magnetic field measurement apparatus and measurement magnetic field display method |
| US20190046059A1 (en) * | 2017-08-09 | 2019-02-14 | Genetesis Llc | Biomagnetic detection |
| CN110325108A (en) * | 2017-08-18 | 2019-10-11 | 克里沃医疗技术有限公司 | Signal Processing in Medical Magnetometers |
| JP2019171019A (en) * | 2018-03-28 | 2019-10-10 | 旭化成エレクトロニクス株式会社 | Magnetocardiograph measurement device, calibration method, and calibration program |
| US20190377035A1 (en) * | 2018-06-08 | 2019-12-12 | Asahi Kasei Microdevices Corporation | Magnetic field measurement apparatus, magnetic field measurement method, and storage medium with magnetic field measurement program stored thereon |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111973172A (en) * | 2020-08-28 | 2020-11-24 | 北京航空航天大学 | Cardiac structure imaging system and method based on MCG and ECG fusion |
| CN111973172B (en) * | 2020-08-28 | 2021-10-08 | 北京航空航天大学 | A cardiac structure imaging system and method based on MCG and ECG fusion |
| CN112089417A (en) * | 2020-09-23 | 2020-12-18 | 北京昆迈医疗科技有限公司 | Ridge magnetic map system, ridge magnetic map processing method and ridge magnetic map processing device |
| CN112089417B (en) * | 2020-09-23 | 2024-02-13 | 北京昆迈医疗科技有限公司 | Spine magnetic map system, spine magnetic map processing method and spine magnetic map processing device |
| CN114325127A (en) * | 2021-12-31 | 2022-04-12 | 华中科技大学 | Power frequency electromagnetic wave detection device and method with directivity |
| WO2023133184A1 (en) * | 2022-01-05 | 2023-07-13 | Tdk U.S.A. Corporation | Methods and devices for electromagnetic measurements from ear cavity |
| EP4460703A4 (en) * | 2022-01-05 | 2025-09-17 | Tdk Corp | Methods and devices for electromagnetic measurements from an ear cavity |
| US12521053B2 (en) | 2022-01-05 | 2026-01-13 | Tdk Corporation | Methods and devices for electromagnetic measurements from ear cavity |
| CN117289187A (en) * | 2023-11-27 | 2023-12-26 | 之江实验室 | Magnetic signal acquisition system |
| CN118177812A (en) * | 2024-05-15 | 2024-06-14 | 之江实验室 | System, method and storage medium for collecting magnetic cardiotonic signals and ballistocardiographic signals |
| CN118177812B (en) * | 2024-05-15 | 2024-08-13 | 之江实验室 | System, method and storage medium for collecting magnetic cardiotonic signals and ballistocardiographic signals |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111000549A (en) | Magnetocardiogram measuring system | |
| CN112842344B (en) | Magnetic field detection system and method | |
| JP3642061B2 (en) | Magnetic field measuring device | |
| Drung | The PTB 83-SQUID system for biomagnetic applications in a clinic | |
| Wang et al. | Measurement of triaxial magnetocardiography using high sensitivity tunnel magnetoresistance sensor | |
| JP7048949B2 (en) | Biomagnetic measuring device | |
| TWI752510B (en) | Measuring device, measuring method and computer program | |
| CN112450935B (en) | A method and system for measuring magnetocardiac based on unshielded atomic magnetometer | |
| JP2017051600A (en) | Magnetism measuring apparatus | |
| JPH02116767A (en) | Device and method for measuring weak magnetic fields that vary with location and time | |
| CN111281370A (en) | A gradiometer-configured magnetoencephalography system based on SERF atomic magnetometer | |
| JP6890484B2 (en) | Magnetic field measuring device and measured magnetic field display method | |
| US20250261890A1 (en) | Systems and Methods for Biomagnetic Field Imaging | |
| US12082915B2 (en) | Magnetic field measurement device, magnetic field measurement method, and recording medium having magnetic field measurement program recorded thereon | |
| WO2024196890A1 (en) | Systems and methods for biomagnetic field imaging | |
| JP3699967B2 (en) | Biomagnetic field measurement device | |
| Nowak | Biomagnetic instrumentation | |
| Li et al. | SQUID-based MCG measurement using a full-tensor compensation technique in an urban hospital environment | |
| Kong et al. | Multi-channel magnetocardiogardiography system based on low-Tc SQUIDs in an unshielded environment | |
| CN116008871A (en) | Precision calibration method for magnetocardiograph probe | |
| Stolz et al. | Integrated SQUID-gradiometer system for magneto-cardiography without magnetic shielding | |
| CN115919318A (en) | A measurement system and method for biomagnetic field | |
| Kong et al. | Recent advances in magnetocardiography | |
| JP3504122B2 (en) | Biomagnetic field measurement system | |
| JP3595660B2 (en) | Measuring device for biological magnetic field |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200414 |