Self-adaptive tuning matching and control system of magnetic resonance radio frequency transmitting coil

By using an adaptive tuning matching system, the frequency and impedance of the RF transmitting coil are adjusted in real time, which solves the matching problem of the RF transmitting coil when the load on the human body and the scanning site changes, improves the transmission efficiency and image quality, and simplifies the preset process.

CN121633946APending Publication Date: 2026-03-10ALLTECH MEDICAL SYST
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Patent Information

Application Number
CN202512051938.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-31
Publication Date
2026-03-10

AI Technical Summary

Technical Problem

In existing magnetic resonance imaging technology, it is difficult to achieve real-time continuous impedance matching and resonant frequency adjustment of the radio frequency transmission coil when the load on the human body and the scanning site changes, resulting in reduced transmission efficiency and deterioration of image quality.

Method used

An adaptive tuning matching system is adopted. The operating state parameters of the radio frequency transmitting coil are obtained through the state sensing module, the target state is determined by the control decision module, and the adjustable reactance element is continuously adjusted by the motor drive adjustment module to realize the automatic adjustment of frequency and matching circuit.

Benefits of technology

It enables real-time continuous tuning and matching under different human body loads and scanning sites, improving transmission efficiency, ensuring image quality, simplifying the preset process, shortening tuning time, and improving matching accuracy and adaptability.

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Abstract

The invention provides a self-adaptive tuning matching and control system of a magnetic resonance radio frequency transmitting coil, and belongs to the technical field of magnetic resonance imaging. The system is composed of a radio frequency transmitting coil, a tuning matching circuit of the radio frequency transmitting coil, an automatic adjusting device, a scattering parameter measuring device, an upper computer interaction module, a PC and a computer processing program. During working, the system only needs to pre-store a group of optimal tuning and matching scattering parameters, after different parts of different human bodies enter the center of the body coil, tuning and matching circuits can be continuously adjusted, changes of the scattering parameters in the adjusting process are collected in real time, and the rotating direction of a tuning strip matching motor can be automatically judged; and the accurate tuning frequency and the optimal matching state are quickly obtained, so that the optimal transmitting efficiency is achieved.
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