Spiral MRI和图像处理

波谱学杂志 ›› 2004, Vol. 21 ›› Issue (2): 175-183.

Spiral MRI和图像处理

卢广，刘买利*，叶朝辉

波谱与原子分子物理国家重点实验室 (中国科学院武汉物理与数学研究所)，湖北武汉 430071

收稿日期:2003-07-08 修回日期:2003-12-01 出版日期:2004-06-05 发布日期:2004-06-05
基金资助:
中国科学院重大项目和方向性项目(KJCX2-SW-03), 国家自然科学基金“重点项目”(10234070)、“面上基金”(20175035)和“杰出青年科学基金”(29925515)资助

AN IMAGING RECONSTRUCTION PROGRAM FOR SPIRAL MRI

LU Guang, LIU Mai-Li*, YE Chao-Hui

State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics (Wuhan Institute of Physics and Mathematics, Chinese Academy of Science), Wuhan 430071, China

Received:2003-07-08 Revised:2003-12-01 Online:2004-06-05 Published:2004-06-05
Supported by:
中国科学院重大项目和方向性项目(KJCX2-SW-03), 国家自然科学基金“重点项目”(10234070)、“面上基金”(20175035)和“杰出青年科学基金”(29925515)资助

摘要/Abstract

摘要：

介绍了在Bruker Biospec 47/30 超导核磁共振成象仪(4.7 T)上实现Spiral快速成像及图像处理系统. 图像处理系统基于PC技术构建而成，主要功能包括：1）将以Spiral形式采集到的时域磁共振信号转化为适用于快速傅立叶变换的笛卡尔网格(Cartesian)形式（网格化处理）；2）二维快速傅立叶变换(2D-FFT，图像重建)；3）由化学位移偏置或磁场不均匀引起得偏共振效应(off-resonance effect)的校正；4）图像分析. 该软件适用于包括以多片多回波在内的各种采样方式得到的Spiral图像的重建和分析，也适用于常规成像数据的重建和分析. 所得到的图像可以以数据方式保存以供再次读入，也能够以TIF、GIF、JPG、BM等格式辅出为图像文件.

关键词: 核磁共振成像, Spiral, 图像重建软件

Abstract:

A PC based image reconstruction program was developed for SPIRAL magnetic resonance imaging. The functionalities of the program included 1) converting the raw data acquired with the spiral trajectory into uniform Cartesian grid; 2) fast two-dimensional Fourier transformation (2D-FFT) for all kinds of MRI, such as multiple-slice multiple echoes; 3) automatic correction of off-resonance effects caused by chemical shift and field inhomogeneity; 4) imaging analysis; 5) export processed images in the formats of TIF, GIF, JPG and BM.

Key words: MRI, Spiral, imaging reconstruction, software

中图分类号:

O482.53

卢广, 刘买利, 叶朝辉. Spiral MRI和图像处理[J]. 波谱学杂志, 2004, 21(2): 175-183.

LU Guang, LIU Mai-Li, YE Chao-Hui. AN IMAGING RECONSTRUCTION PROGRAM FOR SPIRAL MRI[J]. Chinese Journal of Magnetic Resonance, 2004, 21(2): 175-183.

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