Doppler image information-based visual description method of heart flow field velocity vector field

Abstract

The invention discloses a Doppler image information-based visual description method of the heart flow field velocity vector field. The method is based on the two-dimensional color Doppler digital image information and comprises the following steps: extracting the blood flow velocity component in the sound beam direction on a two-dimensional observing plane; decomposing the flow of the two-dimensional observing plane to basic flow and vortex flow according to the characteristic of the two-dimensional observing plane flow field in three-dimensional flow field, then separately calculating the velocity components of basic flow and vortex flow in the sound beam direction and the direction perpendicular to the sound beam direction; and finally composing all the velocity components, calculating the true velocity vector of each particle in the two-dimensional observing plane flow field, and performing visual description to the blood flow velocity vector field in the image. The invention firstly provides a visual description method of the heart flow field blood flow velocity vector field on the basis of the color Doppler digital image treatment, thus greatly increasing the efficiency of the visual quantitative evaluation of the fluid mechanics state of the in situ heart.

Description

technical field [0001] The invention relates to the fields of medical image processing and cardiac fluid mechanics research, in particular to a method for visualizing and quantifying the fluid dynamics state of in vivo cardiac flow field. Background technique [0002] With the continuous development of medical imaging diagnostic technology and the increasing requirement for accurate diagnosis of heart diseases, the visual observation and quantitative evaluation methods of cardiac flow field and fluid dynamic state have attracted people's attention. However, due to the particularity and complexity of the cardiac flow field, classical medical imaging technology can only perform simple qualitative and visual observation of the cardiac flow field, which is difficult to meet the requirements of visual observation and quantitative evaluation of the real cardiac flow field and fluid dynamics state. In recent years, the visualization and quantitative evaluation of cardiac flow field...

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Problems solved by technology

However, this method is mainly based on medical images produced by specific ultrasonic instruments, rather than directly extracting Doppler blood flow velocity information from the perspective of color image processing. The discrete data angle of the flow field represented by the image explains the description of the velocity vector field, so it cannot be widely used in the vector field analysis of various Doppler blood flow images

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