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Proceedings Paper

System integration for image production and real-time control
Author(s): Mark S. Roos
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Paper Abstract

An approach to integration of software and hardware for image production closely coupled with real-time control of an instrument is described. Image production includes reconstruction, processing, display, archiving and export. Feedback of information from images to instrument control is an essential feature, often with a human operator in the loop. Real-time control requires guaranteed response to external events, support for multiple processors and a variety of interfaces to instrumentation. Image production involves implementation of reconstruction and processing algorithms, a windows system, and network support. Both functions need a consistent user interface and an adaptable programming environment . The UNIX operating system running on a network of workstations meets the needs of image production and is very well suited to user interface and software development for both imaging and control. However, high performance real-time control is not possible under most available UNIX systems, but can be accomplished using a real-time kernel running on separate hardware. This suggests a multi-processor approach based on inter-process communication between the workstation and control environments. The architecture consists of three hardware layers (UNIX workstations, board-level microcomputers, and digital signal processors) and four software layers. The real-time software layers are DSP microcode and the microprocessor code. The lower layer of workstation software is a multi-tasked command-driven program tailored for instrument control and image production. The top layer of workstation software consists of an icon or menu driven user interface. A research instrument for nuclear magnetic resonance imaging will serve as an example of this approach.

Paper Details

Date Published: 1 August 1990
PDF: 12 pages
Proc. SPIE 1258, Image Communications and Workstations, (1 August 1990); doi: 10.1117/12.19946
Show Author Affiliations
Mark S. Roos, Lawrence Berkeley Lab. (United States)

Published in SPIE Proceedings Vol. 1258:
Image Communications and Workstations
Walter Bender; Mitsunaga Saito, Editor(s)

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