Resonant circuit characteristics of magnetic resonance radiofrequency transmitter and receiver coils: a simulation analysis(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2020年第10期
- Page:
- 1272-1280
- Research Field:
- 医学信号处理与医学仪器
- Publishing date:
Info
- Title:
- Resonant circuit characteristics of magnetic resonance radiofrequency transmitter and receiver coils: a simulation analysis
- Author(s):
- HUANG Qingming1; 2; 3; 4; ZHENG Gang2; 4
- 1. School of Medical Imaging, Shanghai University of Medicine & Health Sciences, Shanghai 201318, China 2. School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China 3. Shanghai Key Laboratory of Molecular Imaging, Shanghai 201318, China 4. Institute of Medical Imaging Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
- Keywords:
- Keywords: magnetic resonance imaging radiofrequency coil series resonance circuit parallel resonance circuit
- PACS:
- R318；R443.8
- DOI:
- DOI:10.3969/j.issn.1005-202X.2020.10.011
- Abstract:
- Abstract: Objective To improve the conversion efficiency of radio frequency (RF) power and the quality of magnetic resonance imaging (MRI) by making the working frequency of RF coil close to the resonance frequency of MRI, ensuring RF coil in resonance state. Methods On the basis of introducing the principle of resonant circuit of RF coil in MRI, the series resonance circuit and parallel resonance circuit of RF coil were deduced theoretically. The series resonant circuit and parallel resonant circuit were constructed by the electronic circuit design software MULTISIM. The waveform, amplitude-frequency characteristics, phase-frequency characteristics, instantaneous voltage drop and steady-state circuit parameters of the resonant circuits were simulated and analyzed in 3 phases, namely instantaneous action of RF pulse, sinusoidal steady-state and after the removal of RF pulse. Results The electronic circuit simulation results directly reflected the characteristics of series resonant circuit and parallel resonant circuit. The RF coil was in the optimal resonant state by optimizing and adjusting the parameters of electronic circuit, thus improving the conversion efficiency of RF power and improving the quality of MRI image. Conclusion The simulation analysis of the characteristics of resonant circuit provides a technical basis for the design of RF coil, improves the working efficiency and saves the cost of the design and manufacture of the resonant circuit of RF coil.
Last Update: 2020-10-29