US 12,751,630 B2Granted

Multispectral photoacoustic devices

AssigneeQUALCOMM Incorporated

InventorsSumit Agrawal, Ye Zhan, Emily Kathryn Brooks, Hrishikesh Vijaykumar Panchawagh, Ali Lopez, Nicholas Buchan, Kostadin Dimitrov Djordjev, John Keith Schneider

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Abstract

Some disclosed methods may involve providing first light of a first wavelength to a target object at a first time, receiving first ultrasonic receiver signals from an ultrasonic receiver system corresponding to photoacoustic responses of the target object to the first light, providing second light of a second wavelength to the target object at a second time, receiving second ultrasonic receiver signals from the ultrasonic receiver system corresponding to photoacoustic responses of the target object to the second light and differentiating a desired signal from one or more background signals based, at least in part, on the first ultrasonic receiver signals and the second ultrasonic receiver signals. The desired signal may correspond to at least a portion of a blood vessel within the target object. A light source system may be configured for providing the first light and the second light to the target object along the same axis.

Claims30

Dependent claims

An apparatus, comprising:

a platen;
a light source system configured for providing light to a target object on an outer surface of the platen, the light including at least first light of a first wavelength and second light of a second wavelength;
an ultrasonic receiver system configured to receive ultrasonic waves generated by the target object responsive to the light from the light source system;
and
a control system configured to:
cause the light source system to provide the first light to the target object at a first light transmission time;
receive first ultrasonic receiver signals from the ultrasonic receiver system corresponding to photoacoustic responses of the target object to the first light;
cause the light source system to provide the second light to the target object at a second light transmission time;
receive second ultrasonic receiver signals from the ultrasonic receiver system corresponding to photoacoustic responses of the target object to the second light;
and
differentiate a desired signal from one or more background signals based, at least in part, on the first ultrasonic receiver signals and the second ultrasonic receiver signals, wherein differentiating the desired signal from the one or more background signals involves detecting a difference between a first ultrasonic receiver signal amplitude corresponding to a first receiver time, the first receiver time being a time at which an ultrasonic signal is received by the ultrasonic receiver system, and a second ultrasonic receiver signal amplitude corresponding to the first receiver time;
wherein the first ultrasonic receiver signal amplitude corresponds to a first photoacoustic response of the target object to the first wavelength of the first light at the first receiver time and the second ultrasonic receiver signal amplitude corresponds to a second photoacoustic response of the target object to the second wavelength of the second light at the first receiver time.

9 more elements

A method, comprising:

causing a light source system to provide first light of a first wavelength to a target object at a first light transmission time;
receiving first ultrasonic receiver signals from an ultrasonic receiver system corresponding to photoacoustic responses of the target object to the first light;
causing the light source system to provide second light of a second wavelength to the target object at a second light transmission time;
receiving second ultrasonic receiver signals from the ultrasonic receiver system corresponding to photoacoustic responses of the target object to the second light;
and
differentiating a desired signal from one or more background signals based, at least in part, on the first ultrasonic receiver signals and the second ultrasonic receiver signals, wherein the differentiating involves detecting a difference between a first ultrasonic receiver signal amplitude corresponding to a first receiver time, the first receiver time being a time at which an ultrasonic singla is received by the ultrasonic receiver system, and a second ultrasonic receiver signal amplitude corresponding to the first receiver time;
wherein the first ultrasonic receiver signal amplitude corresponds to a first photoacoustic response of the target object to the first wavelength of the first light at the first receiver time and the second ultrasonic receiver signal amplitude corresponds to a second photoacoustic response of the target object to the second wavelength of the second light at the first receiver time.

4 more elements

One or more non-transitory computer-readable media having instructions for performing a method stored thereon, the method comprising:

causing a light source system to provide first light of a first wavelength to a target object at a first light transmission time;
receiving first ultrasonic receiver signals from an ultrasonic receiver system corresponding to photoacoustic responses of the target object to the first light;
causing the light source system to provide second light of a second wavelength to the target object at a second light transmission time;
receiving second ultrasonic receiver signals from the ultrasonic receiver system corresponding to photoacoustic responses of the target object to the second light;
and
differentiating a desired signal from one or more background signals based, at least in part, on the first ultrasonic receiver signals and the second ultrasonic receiver signals, wherein the differentiating involves detecting a difference between a first ultrasonic receiver signal amplitude corresponding to a first receiver time, the first receiver time being a time at which an ultrasonic signal is received by teh ultrasonic receiver system, and a second ultrasonic receiver signal amplitude corresponding to the first receiver time;
wherein the first ultrasonic receiver signal amplitude corresponds to a first photoacoustic response of the target object to the first wavelength of the first light at the first receiver time and the second ultrasonic receiver signal amplitude corresponds to a second photoacoustic response of the target object to the second wavelength of the second light at the first receiver time.

4 more elements

Dependencies are inferred from the claim text.