Koninklijke Philips Corporation N.v.

Technische Universiteit Eindhoven

Wenjing Wang

Gerard De Haan

Albertus Cornelis Den Brinker

The present invention relates to a device, system and method for pulsatility detection. The proposed device comprises an input interface () for obtaining image data of a scene, said image data comprising a time sequence of image frames, an extraction unit () for extracting a time-varying signal indicative of a periodic physiological phenomenon from a region of interest of said image data, a transformation unit () for transforming said time-varying signal into a spectral signal, a partitioning unit () for partitioning the spectral signal into at least an in-band sub-signal covering a first frequency range of said spectral signal and an out-band sub-signal covering a second frequency range of said spectral signal, wherein said first frequency range comprises at least a frequency range of the periodic physiological phenomenon, an analysis unit () for separately deriving an in-band measure from the in-band sub-signal and an out-band measure from the out-band sub-signal, the in-band measure and the out-band measure representing a descriptor, and a classifier () for classifying said region of interest as a pulsatile region of a living being or as a non-pulsatile region based on the descriptor.

Device, system and method for pulsatility detection

The present invention relates to a device, system and method for obtaining a vital signal of a subject. To achieved increased robustness against motion, the device comprises a decomposition unit () for performing a spectral decomposition of at least two photoplethysmography detection signals being related to a physiological property of the subject and allowing extraction of a vital sign of the subject to obtain two or more spectral components of the detection signals. A weight is determined per spectral component based on an estimate of the relevance of the respective spectral component to the vital sign, derived from a characteristic of said spectral component. Finally, a vital sign is obtained by weighting at least part of the spectral components with the determined corresponding weight and extracting a vital sign from the weighted spectral components or by extracting two or more vital sign sub-signals from individual spectral components of the at least two detection signals and, weighting the extracted vital sign sub-signals with the determined weight of the corresponding spectral component, and extracting a vital sign from the weighted vital sign sub-signals.

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Utrecht, Netherlands

Wenjing Wang