核磁共振成像的计算机模拟。

A computer simulation of nuclear magnetic resonance imaging.

作者信息

Summers R M, Axel L, Israel S

出版信息

Magn Reson Med. 1986 Jun;3(3):363-76. doi: 10.1002/mrm.1910030302.

DOI:10.1002/mrm.1910030302

Abstract

A modular, user-friendly computer simulation of NMR imaging was created for the DEC VAX computer. This simulation is novel in that complex imaging phenomena, such as chemical shifts and flow, may be easily studied. Other features include spin warp and backprojection imaging, movie generation, and simulation of image contrast, composite pulse sequences, motion artifacts, aliasing, selective excitation, field inhomogeneity, noise and signal averaging. The simulation incorporates fast Fourier transform and graphics modules for processing and display of one- and two-dimensional images. Examples which illustrate features of the program are shown. The simulation is a useful tool for both the sophisticated and the beginning user of NMR imaging. It serves as a drawing board for studying MRI phenomena and a teaching program for demonstrating basic techniques.

摘要

针对DEC VAX计算机创建了一个模块化、用户友好的核磁共振成像计算机模拟程序。该模拟的新颖之处在于可以轻松研究诸如化学位移和流动等复杂成像现象。其他功能包括自旋扭曲和反投影成像、电影生成以及图像对比度模拟、复合脉冲序列、运动伪影、混叠、选择性激发、场不均匀性、噪声和信号平均。该模拟集成了快速傅里叶变换和图形模块，用于处理和显示一维及二维图像。文中展示了说明该程序功能的示例。该模拟对于核磁共振成像的资深用户和初学者而言都是一个有用的工具。它可作为研究磁共振成像现象的画板以及演示基本技术的教学程序。