Laser speckle blood flow imaging method and system

A technology of laser speckle and imaging method, applied in the field of medical image processing, can solve the problems of low spatial resolution, low frame rate of blood flow velocity image display, unable to fully meet the needs of real-time imaging applications, etc., so as to improve the spatial resolution Low, improve the display frame rate, enrich the effect of blood flow detection indicators

Inactive Publication Date: 2021-04-09
SHANGHAI UNIV +1
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  • Application Information

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Problems solved by technology

[0003] At present, relevant research institutions at home and abroad have developed laser speckle blood flow meters based on laser speckle blood flow imaging technology for blood flow monitoring, but most of them have low spatial resolution and low frame rate of blood flow velocity images. problems, unable to fully meet the application requirements of real-time imaging

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  • Laser speckle blood flow imaging method and system
  • Laser speckle blood flow imaging method and system
  • Laser speckle blood flow imaging method and system

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Embodiment 2

[0064] A laser speckle blood flow imaging system, comprising an FPGA high-speed image acquisition card and a VisualApplet image processing module embedded therein, the FPGA high-speed image acquisition card is used for collecting laser speckle images, and the VisualApplet image processing module is used for Process the laser speckle image collected by the FPGA high-speed image acquisition card according to the method described in Example 1, including the above: time contrast calculation, mean filter processing, false color processing, ROI area selection, and ROI binary value Image acquisition and blood vessel diameter calculation to obtain blood flow velocity images and blood vessel diameter values. In this embodiment, project development is carried out through a variety of FPGA image processing operators provided by Visual Applet, which is no longer limited by the instantaneous computing power of the CPU and the transmission bottleneck of external auxiliary equipment, and can ...

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Abstract

The invention discloses a laser speckle blood flow imaging method and system. The laser speckle blood flow imaging method comprises the following steps: 1) collecting a laser speckle image; 2) performing time contrast to obtain a time contrast image; 3) carrying out mean filtering; 4) performing pseudo-color processing; 5) conducting ROI region selection; 6) acquiring an ROI binary image; and 7) calculating the blood vessel diameter. The spatial resolution and the display frame rate of laser speckle blood flow imaging can be effectively improved, the image processing efficiency can be improved, real-time image processing and display are achieved, and the laser speckle blood flow imaging method and system have the advantages of being easy to operate, high in processing speed, capable of achieving real-time imaging and the like. In addition, the blood vessel diameter can be further calculated, the actual blood flow can be calculated by cooperating with a laser Doppler blood flow meter to give an exact speed value, and therefore richer blood flow detection indexes are provided.

Description

technical field [0001] The invention relates to the technical field of medical image processing, in particular to a laser speckle blood flow imaging method and system. Background technique [0002] Laser speckle blood flow imaging technology is a full-field optical high-resolution imaging technology that does not require scanning and contrast agents. It can reflect the blood flow velocity changes of different blood vessels and the same blood vessel at different times. Real-time monitoring of blood flow distribution and vascular morphology. The principle of this technology is to use the backward dynamic speckle contrast value generated by the movement of red blood cells in blood vessels to obtain blood flow velocity information, and can obtain two-dimensional high-resolution blood flow distribution images without the need for mechanical scanning or injection of exogenous Substances can realize long-term continuous blood flow monitoring, combined with CCD or CMOS camera and h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/026A61B5/00A61B5/02G06K9/32G06T7/136G06T7/62
CPCA61B5/0261A61B5/0033A61B5/02007G06T7/136G06T7/62G06T2207/30101G06V10/25
Inventor 邬丹丹姚康付威威董月芳王驰
Owner SHANGHAI UNIV
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