Design of a radio-frequency pulse generator of low-field magnetic resonance field-lock spectrometer(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2020年第1期
- Page:
- 98-106
- Research Field:
- 医学信号处理与医学仪器
- Publishing date:
Info
- Title:
- Design of a radio-frequency pulse generator of low-field magnetic resonance field-lock spectrometer
- Author(s):
- DONG Shijie1; CHEN Shanshan2; HE Peizhong2
- 1. School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; 2. College of Medical Imaging, Shanghai University of Medicine & Health Sciences, Shanghai 201318, China
- Keywords:
- Keywords: magnetic resonance imaging; field programmable gate array; direct digital synthesis; radio-frequency pulse
- PACS:
- R318.6
- DOI:
- DOI:10.3969/j.issn.1005-202X.2020.01.019
- Abstract:
- Abstract: A radio-frequency (RF) pulse generator is designed based on field programmable gate array (FPGA) and direct digital synthesizer (DDS). A flexible and variable RF pulse signal generator is developed by combining software and hardware, with adjustable output pulse width, the modulation precision of output pulse time controlled in the μs level and carrier frequency up to 300 MHz. Moreover, the phase of the output RF pulse frequency can be adjusted. Both simulation and experimental tests prove that the RF pulse generator based on FPGA and DDS can effectively stimulate the low-field magnetic resonance field-lock samples to generate locked magnetic resonance signals.
Last Update: 2020-01-14