基于单片机的功能磁共振同步器的设计

发布时间：2018-06-19 10:45

本文选题：功能磁共振 + 同步　；参考：《安徽医科大学学报》2015年07期

【摘要】：目的设计一种处理功能磁共振成像(f MRI)同步输出信号的同步器,对其解决同步问题的性能进行鉴定。方法f MRI在采集图像数据时,有两种同步信号输出方式:其一,采集一幅完整脑图时,每采集一层图像输出一个同步方波信号;其二,采集完一幅脑图输出一个同步信号。首先设定一幅完整脑图的采集层数,也称同步参数(SP);然后采集第一种同步方波信号,用单片机外部中断方法对第一种同步方波信号的上升沿计数,并保持初始输出为高电平;直到最后一层脑图时,将输出信号置为低电平并延时一段时间。结果同步器成功将第一种同步方波信号处理成第二种同步信号;matlab编程串口程序自动化设定SP,通过串口传输至单片机;结果表明该同步器可自动化设置SP。结论设计的同步器能使某类功能磁共振输出同步信号的同步问题得以解决,设备兼容性得到提升,其自动化设置SP,可减少医护人员的工作量。
[Abstract]:Aim to design a synchronizer for synchronous output signal processing of functional magnetic resonance imaging (fMRI) and evaluate its performance in solving synchronization problem. Methods when collecting image data, there are two kinds of synchronous signal output modes: one is to output a synchronous square wave signal for each layer of image, and the other is to output a synchronous signal when a whole brain image is collected. The first synchronous square wave signal is collected, the rise edge of the first synchronous square wave signal is counted by the external interrupt method of the single chip microcomputer, and the initial output is kept at a high level. Set the output signal to a low level and delay for a while until the last layer of brain image. Results the first kind of synchronous square wave signal was successfully processed into the second kind of synchronous signal programmed by MATLAB to set up SPs automatically and transmitted to single chip microcomputer through serial port. The result shows that the synchronizer can automatically set up SPs. Conclusion the designed synchronizer can solve the synchronization problem of a kind of functional magnetic resonance output synchronous signal and improve the compatibility of the equipment. The automatic setting of SPs can reduce the workload of medical staff.
【作者单位】：安徽医科大学生命科学学院;
【基金】：国家自然科学基金青年科学基金项目(编号:31400943) 安徽省自然科学基金青年项目(编号:1308085QC55) 安徽省高等学校省级优秀青年人才基金项目(编号:2012SQRL068ZD)
【分类号】：R445.2

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