Empirical Mode Decomposition-Based Method for Artefact Removal in Raw Intracranial Pressure Signals

Martinez-Tejada I, Wilhjelm JE, Juhler M & Andresen M


Intracranial pressure (ICP) signals are often contaminated by artefacts and segments of missing values. Some of these artefacts can be observed as very high and short spikes with a physiologically impossible high slope. The presence of these spikes reduces the accuracy of pattern recognition techniques. Thus, we propose a modified empirical mode decomposition (EMD) method for spike removal in raw ICP signals. The EMD breaks down the signal into 16 intrinsic mode functions (IMFs), combines the first 4 to localize spikes using adaptive thresholding, and then either removes or imputes the identified ICP spikes.

Read the full paper in Acta Neurochir Suppl (click here).