Endoscope system for measuring blood flow velocity in gastrointestinal superficial small blood vessel

A method of measuring a blood flow rate in a gastric subepithelial microvessel, comprising:

• obtaining a blood flow video of the gastric subepithelial microvessel taken using a magnifying endoscope;
• decomposing the obtained blood flow video into frames;
• removing a translation component by comparing an image of frame 1 and an image of a subsequent frame;
• calculating a difference in a red component between the images from which the translation component has been removed, the calculating including setting a red component threshold, determining a difference between the red component of a pixel in frame 1 and a corresponding pixel in the subsequent frame, and calculating the difference in a red component between the images based only for pixels determined to have a difference greater than or equal to the red component threshold;
• segmenting a part for which the difference in the red component has been calculated;
• and
• calculating a segment size of obtained segment data.

A system for measuring a blood flow rate, the system comprising a blood flow video data processing unit for processing blood flow video data, wherein

• the blood flow video data processing unit performs the following data processing:
• decomposing a blood flow video into frames;
• removing a translation component by comparing an image of frame 1 and an image of a subsequent frame;
• calculating a difference in a red component between the images from which the translation component has been removed;
• the calculating including setting a red component threshold, determining a difference between the red component of a pixel in frame 1 and a corresponding pixel in the subsequent frame, and calculating the difference in a red component between the images based only for pixels determined to have a difference greater than or equal to the red component threshold
• segmenting a part for which the difference in the red component has been calculated;
• and
• calculating a segment size of obtained segment data.