A real time parallel processing data acquisition system

Author

Wilkinson, N.A. ; Atkins, M.S. ; Rogers, J.G.

Author_Institution

TRIUMF, Vancouver, BC, Canada

fYear

1988

fDate

6-8 Dec 1988

Firstpage

54

Lastpage

59

Abstract

The design of a VME-based parallel-processing data-acquisition system for the proposed TRIUMF/UBC positron emission tomographs is described. Event records, consisting of eight bytes of data, must be acquired and digitally processed at rates of 250000 to 500000 events per second, corresponding to a data acquisition rate of up to 4 Mb/s. Real-time processing is necessary to reduce the data storage required by half to about 80-90 Mb for a typical patient run, and it also reduces the average data flow and directly reduces the time required for image reconstruction. Real-time data acquisition and processing requirements can be met by about 40 20-MHz Motorola 6820/68881 processors operating asynchronously and in parallel. The authors present the system architecture, the software design, and the hardware design that realizes this very high performance

Keywords

computerised tomography; data acquisition; parallel processing; real-time systems; 4 Mbit/s; TRIUMF/UBC positron emission tomographs; VME-based; hardware design; real time parallel processing data acquisition system; software design; system architecture; Data acquisition; Gamma ray detection; Gamma ray detectors; Gamma rays; Hardware; Image reconstruction; Parallel processing; Radioactive decay; Real time systems; Signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Real-Time Systems Symposium, 1988., Proceedings.

Conference_Location

Huntsville, AL

Print_ISBN

0-8186-4894-5

Type

conf

DOI

10.1109/REAL.1988.51100

Filename

51100