Abstract
Blood flow detected by Doppler-shift velocimeters may be displayed using frequency analysers such as Spectrascribe (Medishield Corporation, London). To interpret these waveforms and produce rapid reliable diagnosis a digitiser/processor has been constructed. It is based on an Intel 4040 microprocessor and a Summagraphics magnetostrictive digitiser. Software is described that provides for operation either remotely via an RS232 interface or from the front panel of the instrument. Routines are provided for measurements of the various parameters used in Doppler-shift diagnosis plus general purpose area, distance and angle programs. Prompts are provided by an alphanumeric display, which also shows the relevant answer. The resulting equipment provides a simple, rapid and economic means of performing hitherto cumbersome measurements to be made routinely on a clinical basis.
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Coghlan, B.A., Taylor, M.G. Digitiser/processor for extraction of clinical parameters from Doppler-shift waveforms. Med. Biol. Eng. Comput. 18, 81–86 (1980). https://doi.org/10.1007/BF02442484
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DOI: https://doi.org/10.1007/BF02442484