摘要
本文基于数值计算模拟技术,开发了模拟磁共振成像(MRI)数据采集与图像重建的仿真软件包——MRISim.虚拟数据采集部分通过对设备硬件、样品(标样或人体部位)进行物理数学建模后,构建原始模拟信号,并填充k空间,然后再基于k空间数据实现磁共振图像重建.该软件可以通过参数的任意调节对影响磁共振图像质量的因素进行可视化分析,包括11种常见伪影的特征和成因分析.我们的研究表明应用该仿真软件可以弥补台式MRI扫描仪价格昂贵、实验时间长等不足之处,实现对相关科技人员的批量化、规模化的实践操作培训.
A software package, MRISim, for virtual magnetic resonance imaging (MRI) data acquisition and image reconstruction was developed based on numerical simulation techniques. Virtual MRI data acquisition could be achieved through physical-mathematical modeling of the equipment and samples (i.e., phantom or human body). Image reconstruction of the virtual data was performed in the same manner as that in a real desktop MRI scanner. The software could also be applied for visualization of the features and causes of a variety of MRI artifacts, with the acquisition and processing parameters in the real experiments. MRISim was demonstrated as an efficient and reliable tool to conduct virtual MRI experiments, avoiding high expense of MRI training on real instruments.
作者
汪红志
施群雁
苗志英
陈珊珊
夏天
WANG Hong-zhi;SHI Qun-yan;MIAO Zhi-ying;CHEN Shan-shan;XIA Tian(Shanghai Key Laboratory of Magnetic Resonance,East China Normal University,Shanghai 200062,China;Shanghai Niumag Corporation,Shanghai 200333,China;School of Optical Electric and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;School of Medical Imaging,Shanghai University of Medicine and Health Science,Shanghai 200318,China)
出处
《波谱学杂志》
CAS
北大核心
2019年第2期225-237,共13页
Chinese Journal of Magnetic Resonance
基金
Shanghai Pujiang Program(17PJ1432500)
关键词
数值计算模拟
数据采集
图像重建
磁共振成像仿真
伪影分析
numerical computation simulation
data acquisition
image reconstruction
magnetic resonance imaging simulator
artifact analysis
