Efficient storage of urodynamic signals by computer: application of FAN adaptive sampling
Digital storage of urodynamic signals such as detrusor pressure and flowrate at a sufficiently high sampling rate (10 samples per second) to allow subsequent analysis requires considerable computer memory. A procedure for compressing these data by deleting redundant samples (the fan method of adaptive sampling) was tested. The method allows a flexible adaptation to specific hardware and a compromise between storage requirements and accuracy. In this study the number of samples required for adequate reconstruction of the detrusor pressure signal could be varied from 80% to 4% of the original number of samples by varying the average difference between reconstructed and original signal from 0.01 to 2 cm H2O. Fast components of the measurements (for example cough peaks) which were lost if a lower sampling rate or averaging was used to obtain equally low storage requirements were unaffected by this compression technique.
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|Urological Research: a journal of clinical and laboratory investigation in urolithiasis and related areas|
|Organisation||Erasmus MC: University Medical Center Rotterdam|
van Mastrigt, R, & Griffiths, D.J. (1989). Efficient storage of urodynamic signals by computer: application of FAN adaptive sampling. Urological Research: a journal of clinical and laboratory investigation in urolithiasis and related areas, 57–62. Retrieved from http://hdl.handle.net/1765/14781