Patent ID: 11957441
Assignee: CONTINUSE BIOMETRICS LTD.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 5:
6. A method for determining flow characteristics of an object, the method comprising:
receiving data indicative of recorded video of a plurality of sequentially sampled frames from the object being illuminated, said data comprising a plurality of sequential secondary speckle patterns originated from at least a portion of the object by diffusive electromagnetic beam reflected from the object;
processing the plurality of sequential secondary speckle patterns, said processing comprising:
dividing said sequential secondary speckle patterns into a plurality of time-wise slices;
calculating autocorrelation function for pixels in the frames of the time-wise slices and extracting a decorrelation decay time for each of said time-wise slices and for each of said pixels, corresponding to each spatial point of said plurality of secondary speckle patterns, as a function of a distance from a point of illumination, corresponding to a penetration depth of the illumination at said spatial point;
based on the decorrelation decay time, performing a statistical analysis of the plurality of secondary speckle patterns in a time-domain; and
generating statistical decorrelation data thereof being indicative of the flow characteristics of the object at different penetration depths of said illumination, thereby enabling to identify low blood flow or a blockage in blood vessels.