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British Journal of Radiology (1976) 49, 1033-1036
© 1976 British Institute of Radiology
doi: 10.1259/0007-1285-49-588-1033
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An automatic bolus injector for use in radiotracer studies of blood flow: design and evaluation

R. E. Snyder, Ph.D. T. R. Overton, Ph.D. D. P. J. Boisvert, M.D. * and K. C. Petruk, M.D., Ph.D *

The Division of Biomedical Engineering and Applied Sciences, and Department of Surgery, University of Alberta, Edmonton, Canada T6G 2G3

An electromechanical device is described which automatically injects the radiotracer bolus used in the measurement of cerebral blood flow. It consists of two electronically controlled, solenoid operated syringes, one containing the radiotracer solution and the other heparinized saline. Results are presented which show that use of the automatic bolus injector in place of hand injection leads to an improvement in the precision of measured flow values. Additional advantages of the device are discussed.

* Medical Research Council of Canada Fellow.

Received for publication July 1, 1976.




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