Design and Construction of a Fully-Opened Unilateral Nuclear Magnetic Resonance System

doi:10.11938/cjmr20140404

Chinese Journal of Magnetic Resonance ›› 2014, Vol. 31 ›› Issue (4): 488-503.doi: 10.11938/cjmr20140404

Design and Construction of a Fully-Opened Unilateral Nuclear Magnetic Resonance System

WANG Hong-zhi^1,2*，LIU Xiang¹，MIAO Zhi-ying¹，CHEN Shan-shan²，SHI Qun-yan¹，XU Luo-yuan³，LU Zhi-yong³，LIU Li-rong³，YANG Pei-qiang³

1. University of Shanghai for Science and Technology, Shanghai, 200093, China;
2. Shanghai Medical Instrumentation College, Shanghai, 200093, China;
3. Suzhou Niumag Corporation Ltd, Suzhou, 215163, China

Received:2014-03-16 Revised:2014-10-30 Online:2014-12-05 Published:2014-12-05
About author:*Corresponding author：WANG hong-zhi, Tel: 021-65485551, E-mail: wanghzhi2000@sina.com.
Supported by:
国家重大科学仪器设备开发专项资助项目(2013YQ170463).

Abstract

Abstract:

The goal of the study is to design and construct a system that can be used to detect magnetic resonance signals generated in the stray magnetic field produced by fully-opened unilateral magnets. The radiofrequency (RF) probe was carefully designed to meet the detection depth requirement for specific applications, and tested on a unilateral nuclear magnetic resonance experiment system. The probe had a 90º pulse width as short as 2.5 s. The whole system has a short system dead time (i.e., 10 s), and the minimum half echo time was 15 s. The SGSE-CPMG experiment was performed on the system to acquire signals from a depth of 5 mm under a constant B0 gradient of 15.3 T/m. Diffusion coefficients were measured under the constant B0 gradient.

Key words: unilateral NMR system, planar coil, SGSE-CPMG sequence, T₂ relaxation time, diffusion coefficient

CLC Number:

O482.53

WANG Hong-zhi1,2*，LIU Xiang1，MIAO Zhi-ying1，CHEN Shan-shan2，SHI Qun-yan1，XU Luo-yuan3，LU Zhi-yong3，LIU Li-rong3，YANG Pei-qiang3. Design and Construction of a Fully-Opened Unilateral Nuclear Magnetic Resonance System[J]. Chinese Journal of Magnetic Resonance, 2014, 31(4): 488-503.

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Design and Construction of a Fully-Opened Unilateral Nuclear Magnetic Resonance System

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