波谱学杂志2016，Vol.33Issue(4)：590-596,7.DOI:10.11938/cjmr20160408
基于FPGA与DDS的磁共振成像射频脉冲发生器
A Radio Frequency Pulse Generator for Magnetic Resonance Imaging Based on FPGA and DDS
摘要
Abstract
A radio frequency (RF) pulse generator for magnetic resonance imaging (MRI) was designed based on field programmable gate array (FPGA) and direct digital synthesis (DDS). The generator utilizes FPGA to achieve DDS and embed soft pulse waveform (RAM), multiplier and related control logic. The RF generator showed high technical specifications, with frequency, phase and amplitude resolution up to 32 bits, 16 bits and 16 bits, respectively. Time precision of the soft pulse waveform reached 0.1ms.FPGA provided a programmable interface, facilitating the control from sequence controller and generation of RF pulses. The feasibility of the design was demonstrated with imaging experiments.关键词
磁共振成像(MRI)/射频脉冲发生器/现场可编程门阵列(FPGA)/直接数字频率合成(DDS)Key words
MRI/radio frequency pulse generator/field programmable gate array (FPGA)/direct digital synthesis (DDS)分类
数理科学引用本文复制引用
李聿为,肖亮..基于FPGA与DDS的磁共振成像射频脉冲发生器[J].波谱学杂志,2016,33(4):590-596,7.基金项目
国家自然科学基金资助项目(81227003) （81227003）
