System and method for tissue analysis using remote PPG
AssigneeKoninklijke Philips N.V.
InventorsMarco ′ Lai, Bernardus Hendrikus Wilhelmus Hendriks, Gerhardus Wilhelmus Lucassen
Life of this patent
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Abstract
A tissue analysis system and method process hyperspectral images to classify tissue types within the images. A presence or level of tissue oxygenation is estimated for each tissue type as well as a PPG perfusion. The estimated tissue oxygenation and PPG perfusion information are combined to provide a tissue status for each tissue type. The system and method uses remote PPG sensing.
Claims15
A system for tissue analysis, comprising:
- a processor adapted to receive hyperspectral images captured by a hyperspectral image sensor and to process the images to:
- derive a photoplethysmography (PPG) delay map from PPG relative delays between different image regions;
- classify tissue types and segment the hyperspectral images into one or more regions corresponding to different tissue types using the different PPG delays to different regions of the images;
- estimate a presence or level of tissue oxygenation for each tissue type;
- derive a PPG perfusion map from PPG amplitude levels at one or more wavelengths of the hyperspectral image sensor;
- and
- combine the estimated tissue oxygenation and PPG perfusion information from the PPG perfusion map to derive a tissue perfusion and oxygenation status for each tissue type.
A computer-implemented tissue analysis method, comprising:
- receiving hyperspectral image sensor images;
- deriving a PPG delay map from PPG relative delays between different image regions;
- classifying tissue types and segmenting the hyperspectral images into one or more regions corresponding to different tissue types using the different PPG delays to different regions of the images;
- estimating a presence or level of tissue oxygenation for each tissue type;
- deriving a PPG perfusion map from PPG amplitude levels at one or more wavelengths of the hyperspectral image sensor;
- and
- combining the estimated tissue oxygenation and PPG perfusion information from the PPG perfusion map to derive a tissue perfusion and oxygenation status for each tissue type.
A non-transitory computer-readable medium storing instructions that, when executed by a processor, causes the processor to perform a method comprising:
- receiving hyperspectral images captured by a hyperspectral image sensor:
- deriving a photoplethysmography (PPG) delay map from PPG relative delays between different image regions;
- classifying tissue types and segment the hyperspectral images into one or more regions corresponding to different tissue types using the different PPG delays to different regions of the images;
- estimating a presence or level of tissue oxygenation for each tissue type;
- deriving a PPG perfusion map from PPG amplitude levels at one or more wavelengths of the hyperspectral image sensor;
- and
- combining the estimated tissue oxygenation and PPG perfusion information from the PPG perfusion map to derive a tissue perfusion and oxygenation status for each tissue type.
Dependencies are inferred from the claim text.