在MRI扫描仪内使用电磁线圈跟踪头部运动,使用电磁线圈
E H Bhuiyan1,2, M E H Chowdhury1,3, P M Glover1
1Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK.
Heliyon
|December 13, 2024
概括
这项研究引入了一种用于MRI的前运动校正的新方法,通过测量头部装配线圈中的诱导电压变化. 这种技术准确地跟踪头部运动,提高脑部成像质量.
科学领域:
- 医疗成像医学成像
- 生物物理学的生物物理.
- 电磁主义 电磁主义
背景情况:
- 在脑MRI中预期的运动校正对于准确的成像至关重要.
- 无意识的头部运动在MRI采集中构成了重大挑战.
- 对于先进的MRI技术来说,对头部运动的实时监测是必不可少的.
研究的目的:
- 开发一种创新的方法,用于MRI的前性运动校正.
- 为了研究在线圈中诱导电压变化的使用,以跟踪头部运动.
- 在MRI扫描仪中创建一个用于准确实时测量头部位置和方向的系统.
主要方法:
- 在循环线圈中模拟诱导的电压变化,由于时间变化的磁场梯度.
- 对于不同的线圈位置和方向 (POSE) 的计算电压.
- 开发了一个线性方程系统和一个校准矩阵,使用五线圈系统的电压数据来估计POSE.
主要成果:
- 确定电压变化可以准确计算线圈系统的POSE变化.
- 开发了能够稳定测量头部运动六度自由度的软件,精度高达0.3毫米.
- 证明系统即使增加了噪声电压 (高达20μV),也保持了准确性.
结论:
- 拟议的基于电磁场的实时跟踪方法具有高度准确性和非侵入性.
- 这种技术可以在MRI扫描仪中准确识别线圈和头部.
- 该方法与标准的MRI硬件兼容,为预期的运动校正提供了实用解决方案.
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