| 姜忠德,谷晓芳,俎栋林.基于PCI总线的磁共振成像数据采集卡设计[J].中国医学影像技术,2005,21(10):1606~1608 |
| 基于PCI总线的磁共振成像数据采集卡设计 |
| A design of high speed data acquisition card for MRI system based on PCI bus |
| 投稿时间：2005-02-05 修订日期：2005-05-11 |
| DOI： |
| 中文关键词: 磁共振成像 数据采集 FPGA PCI总线 |
| 英文关键词:Magnetic resonance imaging Data acquisition FPGA PCI bus |
| 基金项目: |
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| 摘要点击次数: 1847 |
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| 中文摘要: |
| 目的 为小型磁共振成像装置设计专用的高速数据采集卡。方法 采用高速模数转换器ADS 804对MRI复数模拟信号进行数字化采样,用静态存储器(SRAM)暂存这数字化信号数据。扫描完一幅图像数据后再把数据从SRAM读入计算机。对模数转换器ADC和静态存储器SRAM的所有逻辑控制信号包括写入ADC的地址均由现场可编程器件FPGA产生。对FPGA读、写和对AD的读出均使用并行总线,由PCI 9052总线控制器进行控制。结果 用甚高速硬件描述语言Foundation 3.1软件对FPGA进行设计,并对其产生的控制逻辑电路进行了功能仿真模拟,得到了可行的结果。结论 用硬件描述语言VHDL对FPGA进行数字逻辑电路设计是很方便的,修改纠错也很容易。 |
| 英文摘要: |
| Objective The article introduces a design of a special data acquisition card for mini-type MRI system based on PC/PCI bus. Methods The design selects two high speed analog-to-digital converters ADS804 to digitalize the complex MRI signals, using two SRAM to store the data, using FPGA to generate all the logic control signals of ADC and SRAM and the system bus is PCI parallel bus using PCI 9052 bridge to control writing and reading signals to the FPGA, and reading signals to the SRAM. Results Using very speed hardware description language (VHDL), Foundation 3.1 software, simulates all the logic control signals and obtains the available results. Conclusion It is useful and convenient that using VHDL designs the digital logic circuit and easy to check. |
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