Fast laser speckle blood imaging system and method

Abstract

The invention discloses a fast laser speckle blood imaging system and a fast laser speckle blood imaging method. The fast laser speckle blood imaging system comprises a laser, a laser beam expander, a plane mirror, frosted glass, a step motor, a measured object, a CCD (charge coupled device) camera and a computer, wherein laser emitted by the laser passes through the laser beam expander, the plane mirror and the frosted glass, and then irradiates the surface of the measured object; backward scattered light generated by the measured object forms speckles on the surface of the CCD camera; the CCD camera transmits images of the speckles to the computer for processing; and the computer traverses all pixels in a pth frame image, obtains speckle image ambiguities of all the pixels through calculation, calculates the corresponding relative blood flow velocities according to the ambiguities, and establishes a distribution diagram of the relative blood flow velocities. Compared with the conventional fast laser speckle blood imaging system and the fast laser speckle blood imaging method, the fast laser speckle blood imaging system and the fast laser speckle blood imaging method which are provided by the invention have the advantages of small calculation amount and good timeliness.

Description

technical field [0001] The invention relates to an optical imaging technology, in particular to a blood flow imaging system and method based on the principle of laser speckle. Background technique [0002] Laser speckle blood flow imaging technology belongs to the field of optical imaging technology, and has the advantages of no ionizing radiation in optical imaging and non-contact measurement. Specifically, this technology uses biological tissue backward speckle to obtain blood flow velocity information, and obtains a full-field two-dimensional high-resolution blood flow distribution image through imaging. Its advantages are: no need to combine mechanical scanning; no injection contrast It can realize long-term continuous blood flow monitoring; combined with CCD camera and other image acquisition equipment and high-performance parallel computing equipment, this technology can achieve micron-level spatial resolution and millisecond-level temporal resolution , truly realizin...

AI Technical Summary

Problems solved by technology

[0007] The present invention proposes a fast laser speckle blood flow imaging system and method in order to solve the problems of large amount of computation and slow speed in the existing laser speckle blood flow imaging system and method

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