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Biophysical Modeling and Associated Signal Modeling in Functional Magnetic Resonance Imaging

机译：功能磁共振成像中的生物物理建模与相关信号建模

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Background: To make such a large-scale digital PET, we are mainly facing the following technical challenges. First of all, the number of nodes in a large-scale digital PET is generally more than hundreds, how to manage them? When the hundreds of nodes are queried or configured or monitoredat the same time, there will always be a high concurrency of data transmission, how to ensure the real-time of communication and reliability? Objective: Managing hundreds of Detector Unit effectivelly and with good scalability. Methods: We and other investigators have proposed acommunication control subsystem based on CAN and Ethernet in all-Digital PET. It mainly contains three modules: Control Center, System Communication & Switch (SCS) Unit and Detector Unit (DU). Control Center connects one or several SCS units via 100Mbps or Gigabit Ethernet. The two modulesexchange control information through the TCP/IP protocol. The SCS Unit is connected with dozens of detectors through the CAN bus Results: With Ethernet and CAN bus in our Digital Pet, the Control Center can connect up to 100 SCS Units with Gigabit Ethernet. Each SCS Unit can communicatewith almost 100 DUs with 500kbps CAN bus. Conclusion: The good scalability and high bandwidth of CAN and Ethernet perfectly solve the problem that the complex communication of hundreds of detector nodes in digital PET system.
机译：背景：要制作这种大规模的数字宠物，我们主要面临以下技术挑战。首先，大规模数字宠物中的节点数量通常超过数百个，如何管理它们？当查询或配置数百个节点或同时进行监控时，将始终存在数据传输的高并发性，如何确保沟通的实时和可靠性？目的：管理数百个探测器单元，具有良好的可扩展性。方法：我们和其他调查人员提出了基于All-Digital PET中的CAN和以太网的非通信控制子系统。它主要包含三个模块：控制中心，系统通信和开关（SCS）单元和检测器单元（DU）。控制中心通过100Mbps或千兆以太网连接一个或多个SCS单元。通过TCP / IP协议的两个ModuleseXchange控制信息。 SCS单元通过CAN总线结果与数十种探测器连接：使用以太网和CAN总线在我们的数字宠物中，控制中心可以使用千兆以太网连接到100个SCS单元。每个SCS单元都可以与500kbps CAN总线进行通信。结论：CAN和以太网的良好可扩展性和高带宽完全解决了数字宠物系统中数百个检测器节点的复杂通信的问题。

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