基于反转恢复技术的水脂分离磁共振成像方法

波谱学杂志 ›› 2012, Vol. 29 ›› Issue (4): 547-553.

基于反转恢复技术的水脂分离磁共振成像方法

李少蕊^1,3,4*, 翁得河^2,3,4, 陈会城⁵

1. 波谱与原子分子物理国家重点实验室，武汉磁共振中心（中国科学院武汉物理与数学研究所），湖北武汉 430071； 
2. 脑与认知科学国家重点实验室，中国科学院生物物理研究所，北京100101， 
3. 中国科学院大学，北京 100049； 
4. 西门子（深圳）磁共振有限公司，广东深圳 518057； 
5. 深圳市水务技术服务有限公司，广东深圳 518005

收稿日期:2012-03-09 修回日期:2012-05-08 出版日期:2012-12-05 发布日期:2012-12-05
通讯作者: 李少蕊,shaorui_lee@163.com E-mail:shaorui_lee@163.com

A Water-Fat Separation Magnetic Resonance Image Method Based on Inversion Recovery

LI Shao-rui^1,3,4*, WENG De-He^2,3,4, CHEN Hui-Cheng⁵

1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Center for Magnetic Resonance (Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences), Wuhan 430071, China;
2. State Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China;
3. University of Chinese Academy of Sciences, Beijing 100049, China;
4. Siemens Shenzhen Magnetic Resonance Ltd. Shenzhen 518057, China;
5. Shenzhen Water Technology Service Co. Ltd. Shenzhen 518005, China

Received:2012-03-09 Revised:2012-05-08 Online:2012-12-05 Published:2012-12-05
Contact: LI Shao-rui1,shaorui_lee@163.com E-mail:shaorui_lee@163.com

摘要/Abstract

摘要：

提出了使用反转恢复技术获得独立的水和脂肪图像的磁共振成像（MRI）方法. 该方法利用水和脂肪T₁值的差异，在施加选择性180°准备脉冲后，采用不同的反转恢复时间（T_I）2次采集MRI图像，计算出水和脂肪的信号贡献，获得水和脂肪独立的2套图像. 该方法可对水和脂肪进行良好的分离，避免常规水脂分离方法Dixon技术偶发的水-脂互换伪影的产生，同时，可避开相位校正，因此可使计算过程更为简单稳定.

关键词: 磁共振成像（MRI）, 水脂分离, 反转恢复技术, T₁值

Abstract:

A water-fat separation magnetic resonance image (MRI) method based on inversion recovery technique, aiming to obtain water-only and fatonly images, was introduced. Base on different T₁ relaxation time of water and fat, two different inversion recovery time (T_I) was used to acquire two sets of MRI images with different water-fat signal contribution. With the images having different water and fat contributions, the water-only and fat-only images can be calculated by solving equations describing the relationship between the total signal intensity and the water/fat signal intensities. It was demonstrated that this method can be used to separate water and fat signals correctly and avoid the water-fat swap artifact that occurred sporadically in conventional Dixon method. With this method, no complex phase correction was needed, making the computation more simple and stable.

Key words: MRI, water-fat separation, inversion recovery, T₁

中图分类号:

O482.53

李少蕊, 翁得河, 陈会城. 基于反转恢复技术的水脂分离磁共振成像方法[J]. 波谱学杂志, 2012, 29(4): 547-553.

LI Shao-rui, WENG De-He, CHEN Hui-Cheng. A Water-Fat Separation Magnetic Resonance Image Method Based on Inversion Recovery[J]. Chinese Journal of Magnetic Resonance, 2012, 29(4): 547-553.

参考文献

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