A kind of image fusion method and system of CT coronary image and xa angiography image

Abstract

The invention discloses an image fusion method and system for a CT coronary image and an XA angiography image. The method comprises extracting a blood vessel image of an XA image, and conducting diffusion processing of the blood vessel image to obtain an XA diffusion image; extracting a CT coronary image, conducting two-dimensional projection of the CT coronary image to obtain a two-dimensional CT image, and then conducting expansion processing of the two-dimensional CT image to obtain a CT expansion image; taking the XA diffusion image as a reference image and the two-dimensional CT projection expansion image as a floating image, according to a similarity measure function, conducting XA image simulation processing of the CT coronary image to obtain a CT-XA simulation XA image; and then loading a registered CT simulation XA image onto the XA image for fusion display. According to the invention, the CT simulation XA image and the CT-XA fusion image can be obtained, and a reference position and direction are provided for undeveloped blood vessels on the XA angiography image.

Description

technical field [0001] The invention relates to medical device data image processing, in particular to a method and system for fusing CT coronary images and XA contrast images. Background technique [0002] Using CT (Computer X-ray tomography technique, computer X-ray tomography technology) to perform enhanced scans on the heart, a complete CT image of the heart at a certain phase can be obtained. XA (X-ray angiography, X angiography), the degree of development is much better. As far as the current technology is concerned, the cardiovascular (hereinafter referred to as coronary artery) can be completely extracted from the heart image of CT enhanced scan. The same vessel with occlusion is very difficult to be visualized by XA angiography, but it can be visualized relatively easily by enhanced CT scan and extracted by technical means. In this way, the XA image can be approximated by performing projection transformation on the three-dimensional coronary image (Martin Groher.2...

AI Technical Summary

Problems solved by technology

2D-3D registration is a complex space transformation process. It is difficult for doctors to complete this process manually. It is impossible to simulate the posture and shape of the catheter head, and it is impossible to realize CT equipment to simulate DSA catheter inspection images and realize CT images and DSA images. fusion etc.

For the point set registration algorithm, the biggest problem with this type of algorithm is that it has high requirements on the integrity of blood vessel extraction, so XA blood vessel segmentation often needs to be done manually, which is a very heavy operation for doctors.

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