傅里叶变换磁共振成像中的运动相位伪影。

Motional phase artifacts in Fourier transform MRI.

作者信息

Wedeen V J, Wendt R E, Jerosch-Herold M

机构信息

Whitaker College, Massachusetts Institute of Technology, Cambridge 02138.

出版信息

Magn Reson Med. 1989 Jul;11(1):114-20. doi: 10.1002/mrm.1910110110.

DOI:10.1002/mrm.1910110110

PMID:2747511

Abstract

Most magnetic resonance imaging (MRI) techniques are subject to a "motional blurring" arising from the acquisition of data in the presence of a frequency-encoding gradient. The Fourier transform of the signal from a spin moving along a magnetic field gradient obeys an equation analogous to the free space Schrödinger equation. Computer simulations of the Bloch equations illustrate the implications of this motional blurring in MRI.

摘要

大多数磁共振成像（MRI）技术都会受到“运动模糊”的影响，这种模糊是在存在频率编码梯度的情况下采集数据时产生的。来自沿磁场梯度移动的自旋的信号的傅里叶变换服从一个类似于自由空间薛定谔方程的方程。布洛赫方程的计算机模拟说明了这种运动模糊在MRI中的影响。