| CPC A61B 5/0095 (2013.01) [A61B 5/02416 (2013.01)] | 16 Claims |
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1. An apparatus for measuring a bio-signal, the apparatus comprising:
a light source configured to emit light;
an ultrasonic transducer configured to obtain a photoacoustic signal generated from an object;
a photoacoustic coupler disposed in contact with the ultrasonic transducer and configured to direct the light transmitted from the light source to a scanner and to direct the photoacoustic signal generated from the object to the ultrasonic transducer;
the scanner configured to reflect the light incident from the photoacoustic coupler to the object, and reflect the photoacoustic signal generated from the object to the photoacoustic coupler;
a scanner controller configured to adjust a light incident position on the object by controlling an angle of the scanner;
a plurality of light detectors configured to obtain a light signal by assigning a weight based on a distance between the light incident position on the object and each of the plurality of detectors, and computing a weighted sum of an amount of light detected by each of the plurality of light detectors, based on the light incident position being placed between the plurality of light detectors; and
a processor configured to obtain bio-information based on the light signal and the photoacoustic signal,
wherein the scanner controller is further configured to adjust the light incident position to be placed between the plurality of light detectors by adjusting the angle of the scanner while the light source, the ultrasonic transducer, and the plurality of light detectors are placed at fixed positions, and allow a first distance between one of the plurality of light detectors and the light incident position to increase as a second distance between another one of the plurality of light detectors and the light incident position decreases, and
wherein the processor is configured to obtain a blood vessel image of the object based on the photoacoustic signal for each light incident position.
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