Volume 80, Issue 1 pp. 200-210
Full Paper

Motion-tolerant diffusion mapping based on single-shot overlapping-echo detachment (OLED) planar imaging

Lingceng Ma

Lingceng Ma

Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, Xiamen University, Xiamen, China

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Congbo Cai

Congbo Cai

Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, Xiamen University, Xiamen, China

Department of Communication Engineering, Xiamen University, Xiamen, China

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Hongyi Yang

Hongyi Yang

High Magnet Field Laboratory, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Hefei, China

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Shuhui Cai

Shuhui Cai

Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, Xiamen University, Xiamen, China

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Junchao Qian

Junchao Qian

High Magnet Field Laboratory, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Hefei, China

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Lizhi Xiao

Lizhi Xiao

State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing, China

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Kai Zhong

Corresponding Author

Kai Zhong

High Magnet Field Laboratory, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Hefei, China

Correspondence to: Zhong Chen, Ph.D., Department of Electronic Science, Xiamen University, Xiamen, 361005, China. E-mail: [email protected]; and Kai Zhong, Ph.D., High Magnet Field Laboratory, Chinese Academy of Sciences, Hefei, 230031, China. E-mail: [email protected]Search for more papers by this author
Zhong Chen

Corresponding Author

Zhong Chen

Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, Xiamen University, Xiamen, China

Correspondence to: Zhong Chen, Ph.D., Department of Electronic Science, Xiamen University, Xiamen, 361005, China. E-mail: [email protected]; and Kai Zhong, Ph.D., High Magnet Field Laboratory, Chinese Academy of Sciences, Hefei, 230031, China. E-mail: [email protected]Search for more papers by this author
First published: 28 November 2017
Citations: 15

Grant support: National Natural Science Foundation of China; grant numbers U1632274, 81671674, 11474236, and 41130417.

Abstract

Purpose

A new diffusion-mapping method based on single-shot overlapping-echo detachment (DM-OLED) planar-imaging sequence, along with a corresponding separation algorithm, is proposed to achieve reliable quantitative diffusion mapping in a single shot. The method can resist the effects of motion and help in detecting the quick variation of diffusion under different physiological status.

Methods

The echo-planar imaging method is combined with two excitation pulses with small flip angle to gain overlapping-echo signal in a single shot. Then the overlapping signals are separated by a separation algorithm and used for diffusion computation. Numerical simulation, phantom, and in vivo rat experiments were performed to verify the efficiency, accuracy, and motion tolerance of DM-OLED.

Results

The DM-OLED sequence could obtain reliable diffusion maps within milliseconds in numerical simulation, phantom, and in vivo experiments. Compared with conventional diffusion mapping with spin-echo echo-planar imaging, DM-OLED has higher time resolution and fewer motion-incurred errors in the apparent diffusion coefficient maps.

Conclusions

As a reliable fast diffusion measurement tool, DM-OLED shows promise for real-time dynamic diffusion mapping and functional magnetic resonance imaging. Magn Reson Med 80:200–210, 2018. © 2017 International Society for Magnetic Resonance in Medicine.

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