Development of Gradient Coils and 1H/13C Dual-resonance RF Coils for a Small-bore 5 T MRI System

doi:10.11938/cjmr20243100

Abstract

Abstract:

Based on the independently developed 5 T magnetic resonance imaging (MRI) system and research needs of¹³C metabolic MRI, a gradient coil and ¹H/¹³C dual resonance radiofrequency (RF) coil system for small-bore MRI were designed. The gradient coil was designed by using the finite-difference stream function method, and the RF coil was designed as a saddle coil combined with a surface coil in a dual-resonance scheme. Numerical simulation analysis of the magnetic field distribution was carried out by using the finite-element method, and a set of gradient and RF coils for small-bore 5 T ¹³C MRI was successfully developed. The feasibility of the design scheme was verified using a home-made 5 T MRI system, and the magnetic resonance images of ¹³C-labeled urea phantom and ¹H magnetic resonance images of mice head were acquired by experimental tests, which lays a foundation for ¹³C metabolic MRI based on dynamic nuclear polarization in the future.

Key words: high-field MRI, ¹³C metabolic MRI, gradient coil, ¹H/¹³C dual resonance coil, saddle coil, surface coil

CLC Number:

O482.53

YI Peng, CAO Li, HUANG Zhen, CHENG Xin, WANG Jiaxin, CHEN Li, CHEN Fang, BAO Qingjia, ZHANG Zhi, LIU Chaoyang. Development of Gradient Coils and ¹H/¹³C Dual-resonance RF Coils for a Small-bore 5 T MRI System[J]. Chinese Journal of Magnetic Resonance, 2024, 41(3): 245-256.

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References 32

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线圈方向	电感/μH	电阻/Ω	效率/(mTm^-1A^-1)	线性度	G_max/(T/m)	切换率/(T/m/s)
x	66.71	0.9	13.9184	0.99951	0.82	10000
y	68.68	0.9	13.0022	0.99758	0.8	9756.1
z	65.33	1.1	14.7408	0.99978	1	12195.1

Development of Gradient Coils and ¹H/¹³C Dual-resonance RF Coils for a Small-bore 5 T MRI System

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