美国物理医学与康复学会/北美放射学会住院医师物理教程。磁共振成像基础物理学：引言。

The AAPM/RSNA physics tutorial for residents. Basic physics of MR imaging: an introduction.

作者信息

Hendrick R E

机构信息

Department of Radiology, University of Colorado Health Sciences Center, Denver 80262.

出版信息

Radiographics. 1994 Jul;14(4):829-46; quiz 847-8. doi: 10.1148/radiographics.14.4.7938771.

DOI:10.1148/radiographics.14.4.7938771

PMID:7938771

Abstract

This article provides an introduction to the basic physical principles of magnetic resonance (MR) imaging. Essential basic concepts such as nuclear magnetism, tissue magnetization, precession, excitation, and tissue relaxation properties are presented. Hydrogen spin density and tissue relaxation times T1, T2, and T2* are explained. The basic elements of a planar MR pulse sequence are described: section selection during tissue excitation, phase encoding, and frequency encoding during signal measurement.

摘要

本文介绍了磁共振成像（MR）的基本物理原理。阐述了诸如核磁、组织磁化、进动、激发以及组织弛豫特性等基本概念。解释了氢自旋密度以及组织弛豫时间T1、T2和T2*。描述了平面MR脉冲序列的基本要素：组织激发期间的层面选择、相位编码以及信号测量期间的频率编码。