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AssigneeNihon Kohden Corporation
InventorYoshinori Ueda
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An interface receives first, second, and third signals respectively corresponding to intensities of first, second, and third light respectively including first, second, and third wavelengths that have passed through a tissue of a subject. A filter allows passage of a signal having a frequency included in a specific frequency band. A processor calculates a concentration of a light absorber in blood of the subject based on the first and the second signals that have passed through the filter. A ratio of extinction coefficients of a first and second light absorbers in blood is different between the first and second wavelengths. Any one of the first and second light absorbers in blood is the light absorber in blood. The third signal has a larger amplitude than the first and second signals. The processor determines the frequency band based on a frequency of the third signal.
A signal processing device, comprising:
A medical photometer, comprising:
A non-transitory computer-readable medium having stored a computer program adapted to be executed by a processor installed in a signal processing device, the computer program being configured to cause, when executed, the signal processing device to:
A photometry method, comprising:
Dependencies are inferred from the claim text.