Medusa: a scalable MR console using USB.
Medusa: a scalable MR console using USB.
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DOI：
10.1109/tmi.2011.2169681
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发表时间：
2012-02
影响因子：
10.6
通讯作者：
Scott GC
中科院分区：
文献类型：
--
作者：
Stang PP;Conolly SM;Santos JM;Pauly JM;Scott GC
MRI脉冲序列控制台通常采用封闭的专有硬件、软件和接口，这使得对创新实验技术的任何适应都很困难。然而，MRI系统的研究正趋向于更高的通道数接收器、发射器、梯度/垫片和用于介入性应用的独特接口。对于使用现代电子元件的研究人员来说，定制的控制台设计现在是可行的，但高数据速率、同步性、可扩展性和成本带来了重大挑战。实现高效和灵活的大型多通道MR系统需要可扩展的模块化体系结构。对于Medusa，我们提出了一个开放的系统架构，使用通用串行总线(USB)实现可扩展性，并结合分布式处理和缓冲来解决多通道MRI所需的高数据速率和严格同步。Medusa采用基于数字合成器、接收器和梯度模块的模块化设计概念，并结合用于采样和同步的快速可编程逻辑。Medusa是一种合成仪器，可重新配置以满足各种医疗/科学仪器需求。介绍了Medusa分布式体系结构、可伸缩性和数据带宽限制，并在各种新颖的MRI应用中展示了其灵活性。
MRI pulse sequence consoles typically employ closed proprietary hardware, software, and interfaces, making difficult any adaptation for innovative experimental technology. Yet MRI systems research is trending to higher channel count receivers, transmitters, gradient/shims, and unique interfaces for interventional applications. Customized console designs are now feasible for researchers with modern electronic components, but high data rates, synchronization, scalability, and cost present important challenges. Implementing large multi-channel MR systems with efficiency and flexibility requires a scalable modular architecture. With Medusa, we propose an open system architecture using the Universal Serial Bus (USB) for scalability, combined with distributed processing and buffering to address the high data rates and strict synchronization required by multi-channel MRI. Medusa uses a modular design concept based on digital synthesizer, receiver, and gradient blocks, in conjunction with fast programmable logic for sampling and synchronization. Medusa is a form of synthetic instrument, being reconfigurable for a variety of medical/scientific instrumentation needs. The Medusa distributed architecture, scalability, and data bandwidth limits are presented, and its flexibility is demonstrated in a variety of novel MRI applications.