医用磁共振典型临床成像序列的梯度磁场致振动研究  

A Study on Gradient Magnetic Field-Induced Vibration in Typical Clinical Imaging Sequences of Medical Magnetic Resonance Imaging

作　　者：李贤万 刘勋 刘沿 陈雅 李永华 杨煜 程云章[1,5] 张培茗 LI Xianwan;LIU Xun;LIU Yan;CHEN Ya;LI Yonghua;YANG Yu;CHENG Yunzhang;ZHANG Peiming(School of Health Science and Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Institute of Medical Device Testing,Shanghai 201318,China;NMPA Key Laboratory for Medical Electrical Equipment,Shanghai 201318,China;School of Biomedical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Engineering Research Center of Interventional Medical Device,Shanghai 200093,China)

机构地区：[1]上海理工大学健康科学与工程学院,上海200093 [2]上海市医疗器械检验研究院,上海201318 [3]国家药品监督管理局医用电气设备重点实验室,上海201318 [4]上海交通大学生物医学工程学院,上海200240 [5]上海介入医疗器械工程技术研究中心,上海200093

出　　处：《生物医学工程学进展》2025年第1期1-8,共8页Progress in Biomedical Engineering

基　　金：植入式心脏再同步治疗起搏器研发项目(2022YFC2404904)。

摘　　要：梯度磁场线圈是磁共振成像(MRI)系统的重要组成部分,其性能不仅决定MRI的速度,也影响MRI的振动特性。了解典型临床成像序列中的梯度时序对分析MRI设备的振动特性起源具有重要意义。该文通过搜索线圈测量典型临床成像序列中梯度场的磁场变化率(dB/dt)信号,并利用激光测振仪对MRI设备的振动特性进行评估,分析典型临床成像序列所诱导的设备振动频谱与梯度切换率水平变化模式。结果表明,梯度时序与MRI设备振动之间具有较强的相关性。The gradient magnetic field coil is an important component of magnetic resonance imaging system(MRI).Its performance can not only determine the MRI imaging speed but also affect the vibration characteristics of MRI.It is important to understand the gradient timing in typical clinical sequences to analyze the origin of vibration characteristics of MRI equipment.In this paper,the magnetic field rate of change(dB/dt)signal of gradient field in typical clinical imaging sequences is measured by searching coils,and the vibration characteristics of MRI equipment are evaluated by laser vitometer.The horizontal change patterns of device vibration spectrum and gradient slew rate induced by typical clinical imaging sequences were analyzed.The results show that there is a strong correlation between the gradient timing and the vibration of MRI equipment.

关 键 词：磁共振成像 梯度磁场 梯度切换率 振动 

分 类 号：R318.6[医药卫生—生物医学工程] R318.5[医药卫生—基础医学] R445.2