Beat-to-beat division method of intracranial pressure signal based on waveform character matching
A technology of waveform characteristics and intracranial pressure, applied in image analysis, medical science, diagnosis, etc., can solve the problems of difficult to guarantee accuracy, low segmentation efficiency, uneven segmentation standards, etc., to improve robustness and simplify data. The effect of calculation
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[0100] In this embodiment, the intracranial pressure signals are collected by the intracranial pressure monitor (Codman-Hakim, Johnson & Johnson, the U.S.). These signals are digital signals with a sampling frequency of 400 Hz, and these signals are input into a computer for low-pass filtering and sampling. For preprocessing, the filter uses a second-order Butterworth low-pass filter with a cutoff frequency of 25Hz and a sampling frequency of 125Hz, and the obtained signal is used as the signal to be tested. One of the intracranial pressure signals to be measured Its waveform profile is as Figure 9 Shown; Utilize the method of the present invention, the intracranial pressure signal to be measured Split by beat. In the computer, the specific steps are as follows:
[0101] First, establish a logarithmic polar distribution model, such as Figure 7 As shown, the value radius ξ of logarithmic polar diameter max It is pre-set to 10, and M is 10, that is, every "1" logarithmi...
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