Elion J L, Petrocelli R R
Brown University, Providence, RI.
Proc Annu Symp Comput Appl Med Care. 1994:428-32.
A high-speed fiber-based network for the transmission and display of digitized full-motion cardiac images has been developed. Based on Asynchronous Transfer Mode (ATM), the network is scaleable, meaning that the same software and hardware is used for a small local area network or for a large multi-institutional network. The system can handle uncompressed digital angiographic images, considered to be at the "high-end" of the bandwidth requirements. Along with the networking, a general-purpose multi-modality review station has been implemented without specialized hardware. This station can store a full injection sequence in "loop RAM" in a 512 x 512 format, then interpolate to 1024 x 1024 while displaying at 30 frames per second. The network and review stations connect to a central file server that uses a virtual file system to make a large high-speed RAID storage disk and associated off-line storage tapes and cartridges all appear as a single large file system to the software. In addition to supporting archival storage and review, the system can also digitize live video using high-speed Direct Memory Access (DMA) from the frame grabber to present uncompressed data to the network. Fully functional prototypes have provided the proof of concept, with full deployment in the institution planned as the next stage.
已开发出一种用于传输和显示数字化全动态心脏图像的高速光纤网络。该网络基于异步传输模式（ATM），具有可扩展性，即对于小型局域网或大型多机构网络使用相同的软件和硬件。该系统能够处理未压缩的数字血管造影图像，这类图像被认为处于带宽要求的“高端”。除了联网之外，还实现了一个通用的多模态审查站，无需专门的硬件。该审查站可以将完整的注射序列以512×512格式存储在“循环随机存取存储器”中，然后在以每秒30帧的速度显示时插值到1024×1024。网络和审查站连接到一个中央文件服务器，该服务器使用虚拟文件系统，使大型高速磁盘阵列存储磁盘以及相关的离线存储磁带和盒式磁带在软件看来都如同一个单一的大型文件系统。除了支持存档存储和审查之外，该系统还可以使用来自图像采集卡的高速直接内存访问（DMA）对实时视频进行数字化处理，以便将未压缩的数据呈现给网络。全功能原型已提供了概念验证，计划在下一阶段在该机构全面部署。
