一种基于高性能DSP的MRI梯度计算模块设计  

Design of High Performance DSP-based Gradient Calculation Module for MRI

作　　者：潘文宇[1] 张富[1] 罗海 周荷琴[1] 

机构地区：[1]中国科学技术大学自动化系,合肥230027

出　　处：《中国医疗器械杂志》2011年第3期189-193,共5页Chinese Journal of Medical Instrumentation

摘　　要：针对MRI谱仪数字化的需求,设计了一种基于高性能DSP的梯度计算模块。它可以根据用户的要求由单片DSP完成旋转变换、预加重、匀场补偿等梯度计算功能,输出X、Y、Z三路梯度数据和B0匀场补偿数据。实验结果表明,该模块在功能、速度和精度上都能满足MRI梯度计算的要求,并具有良好的通用性,为数字化谱仪的研制提供了一种实用的梯度计算解决方案。A gradient calculation module based on high performance DSP was designed to meet the needs of digital MRI spectrometer.According to the requirements of users,this apparatus can achieve rotation transformation,pre-emphasis,shimming and other gradient calculation functions in a single chip of DSP.It then outputs gradient waveform data of channel X,Y,Z and shimming data of channel B0.Experiments show that the design has good versatility and can satisfy the functional,speed and accuracy requirements of MRI gradient calculation.It provides a practical gradient calculation solution for the development of digital spectrometer.

关 键 词：MRI DSP 梯度计算 预加重 匀场补偿 

分 类 号：R445.2[医药卫生—影像医学与核医学]