Three-dimensional digital subtraction angiography method and device, electronic equipment and storage medium

Abstract

The embodiment of the invention provides a three-dimensional digital subtraction angiography method and device, electronic equipment and a storage medium. According to the CT image reconstruction method, an X-ray imaging system is used for shooting multiple frames of measured object images with markers, the high-precision imaging geometrical relationship between the imaging system and a measured object is obtained by calculating the markers in the images, and the three-dimensional image of the measured object is obtained. A CT image reconstruction method is used for conducting CT image reconstruction on multiple frames of images shot under the mask operation and the filling operation, corresponding coordinate pixel gray scale subtraction is conducted on the two kinds of three-dimensional images of the filling operation and the mask operation, and a subtraction angiography image is obtained. The coordinate system is established on the measured object, and the coordinate system of the measured object comprises the movement or change of the measured object, so that the three-dimensional image result of the measured object is matched and aligned with high precision, various movements and errors in a CT running state are automatically and effectively eliminated, and a three-dimensional digital subtraction angiography image is obtained with high precision.

Description

technical field [0001] The present application relates to the technical field of image processing, in particular to a three-dimensional digital subtraction angiography method, device, electronic equipment and storage medium. Background technique [0002] Three-dimensional digital subtraction angiography (3D Digital Subtraction Angiography, 3D-DSA) is a new type of angiography technology that has developed rapidly in recent years. It is used to detect and monitor the three-dimensional structure, size and working condition of blood vessels in human heart and brain. Wait. [0003] Its main principle is to reconstruct the CT three-dimensional image of the interested parts of the human body through CT technology such as C-arm CT or spiral CT in the mask state, and obtain the three-dimensional CT image in the mask state; and then inject contrast agent into the human body , and perform three-dimensional image reconstruction to obtain a three-dimensional CT image in the filling sta...

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Problems solved by technology

[0004] At present, the accuracy of the imaging geometric relationship between the imaging system and the measured object, and the registration accuracy of image subtraction are mainly guaranteed by the structural stiffness, processing accuracy, and motion synchronization control accuracy of the CT imaging system. And usually require the measured object to remain stable, this method is costly and has low accuracy

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