A magnetic nanoparticle-enhanced magnetic induction system for detecting hemorrhagic stroke

By using a magnetic nanoparticle-based magnetic induction detection system, an alternating magnetic field is excited at a specific frequency using a series resonant circuit and a Helmholtz excitation coil. Combined with the nonlinear magnetization response of the magnetic nanoparticles, the problems of poor stability and low sensitivity of existing systems are solved, and efficient detection of cerebral hemorrhage is achieved.

CN117462104BActive Publication Date: 2026-07-24ARMY MEDICAL UNIV
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Patent Information

Application Number
CN202311352444.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-10-18
Publication Date
2026-07-24
Estimated Expiration
2043-10-18

AI Technical Summary

Technical Problem

Existing magnetic induction stroke detection systems suffer from poor stability and low sensitivity, making them ineffective in detecting low-frequency cerebral hemorrhage.

Method used

A magnetic induction detection system based on magnetic nanoparticles is adopted, including a signal source, a power amplifier, a series resonant circuit, a Helmholtz excitation coil, and a symmetrical cancellation receiving coil. An alternating magnetic field is excited at a specific frequency through the series resonant circuit, and the detection signal is enhanced by combining the nonlinear magnetization response of magnetic nanoparticles in the alternating magnetic field.

Benefits of technology

The stability and sensitivity of the detection system have been improved, enabling effective detection of cerebral hemorrhage and enhancing the detection capability in the low-frequency band.

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Abstract

The application claims a kind of based on magnetic nano particle enhanced magnetic induction hemorrhagic cerebral apoplexy detection system, belong to biomedical engineering field cerebral disease detection and monitoring and physiological signal detection field, it includes: signal source, power amplifier, series resonance circuit, receiving coil, excitation coil, acquisition card and computer, wherein, the signal source is connected with power amplifier, the power amplifier is connected with series resonance circuit, the series resonance circuit is connected with receiving coil and excitation coil respectively, the receiving coil is connected with acquisition card, and the acquisition card is connected with computer;The application includes hardware series resonance circuit design, MAXWELL simulation coil design and helmholtz coil production, hardware system building and experimental test.The application proposes a kind of with high sensitivity can bed-side monitoring system, timely detection cerebral hemorrhage, and it has important significance for the discrimination of cerebral apoplexy type and related cerebral disease monitoring.
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