System and method for retrieving corresponding positional relationship of blood vessels under multi-angle arteriography

A technology corresponding to positions and multiple angles, applied in the fields of application, cardiac catheterization, medical science, etc., can solve the problems of complicated operation, high risk, trauma, rising cost, etc., and achieve the effect of simplifying complexity and ensuring accuracy.

Inactive Publication Date: 2017-10-10
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can confirm the corresponding blood vessels in the multi-angle contrast images, it requires percutaneous intervention with a guide wire, which has a high risk of trauma and complicated operation, and it takes a long time to get the result quickly; the use of the guide wire also leads to cost. rise

Method used

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  • System and method for retrieving corresponding positional relationship of blood vessels under multi-angle arteriography
  • System and method for retrieving corresponding positional relationship of blood vessels under multi-angle arteriography
  • System and method for retrieving corresponding positional relationship of blood vessels under multi-angle arteriography

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Embodiment 1

[0040] Such as figure 1 As shown, the present invention provides a retrieval system for the corresponding positional relationship of blood vessels under multi-angle radiography. The system includes a radiography machine, a radiography image acquisition module, a center point calibration module, a feature point detection module, a feature point corresponding blood vessel module, and a display module. The imaging machine can be possible imaging equipment such as X-ray imaging machine, CT, etc., wherein:

[0041] The radiography machine is used to perform multi-angle radiography on blood vessels; the radiography image receiving module is used to receive radiography images from multiple projection angles and transmit the images to the center point calibration module. It should be emphasized that the multi-angle radiography here , can be two angles, three angles, or even more angles. When more angles are selected, the retrieval accuracy is higher. When more angles are selected, the...

Embodiment 2

[0045] In a specific example, refer to Figure 4 , to further elaborate the epipolar constraint relationship in the present invention, it should be pointed out that the epipolar constraint relationship can be used in many ways, such as the space offset algorithm in the prior art, and the following embodiment is only a preferred embodiment , to further illustrate the principles of the present invention, but should not be interpreted as limiting the protection scope of the present invention.

[0046] The epipolar constraint relationship of spatial points on the two projection planes is as follows: Figure 4 shown. The projection point of a point d in space on the first projection plane is d 1 , d and d 1 The projection line l of the connecting line on the second projection plane 1 defined as d 1 On the epipolar line of the second projection plane, d and d 2 The projection line l of the connecting line on the first projection plane 2 defined as d 2 The epipolar line on th...

Embodiment 3

[0064] This embodiment is used to describe a specific method for center point offset calibration, and this method is only used as an example of a specific applicable embodiment, and should not be understood as limiting the scope of the present invention by its specific calculation method. In a specific implementation, for example, taking two angle images as an example, when the center points of the two angle projections are offset, the system does not satisfy the epipolar line constraint relationship, and there is a corresponding offset between the projection point and the projection line. Such as Figure 5 As shown, the first projection system and the second projection system of the dual projection system have center point offset (o 1 -o 2 ), the projection point A of the calibration point A and point B in the second image 2 , B 2 and the first image projection point A 1 , B 1 Corresponding polar line l A , l B There is an offset. When the system detects that the offs...

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Abstract

The invention discloses a system and method for retrieving the corresponding positional relationship of blood vessels under multi-angle arteriography. The system comprises an angiographic machine, an angiographic image receiving module, a center point calibration module, a corresponding feature point detection module and a feature point corresponding blood vessel module; the angiographic machine is used for imaging and collecting a plurality of angiographic images of a projection position; the angiographic image receiving module is used for receiving the images and transmitting the images to the center point calibration module; the center point calibration module is used for calibrating the center point deviation caused by a multi-angle arteriography system, and a result is transmitted to the feature point detection module; the feature point detection module receives a plurality of feature points of a reference projection angle angiographic image target blood vessel, and corresponding feature points of a second projection angle image is detected through a spatial polar line constraint relationship; the feature point corresponding blood vessel module is used for determining the blood vessels where the feature points are located. By means of the system and method, the complexity of existing corresponding relationship detection is simplified, and the accuracy of the result is ensured while noninvasive detection is achieved.

Description

technical field [0001] The present invention relates to an image data processing system for angiography and a convenient retrieval system applied to the corresponding positional relationship of blood vessels under multi-angle angiography, including the epipolar constraint relationship of multi-projection angle angiography images and the detection of corresponding position feature points, especially It involves determining the corresponding relationship between blood vessels with large morphological differences or multiple blood vessels with relatively similar morphologies in contrast images at different angles. Background technique [0002] In order to make angiographic images more truly reflect the distribution structure of blood vessels, the current clinical imaging system often performs multi-angle X-ray angiography on blood vessels, and the real structure of blood vessels can be determined through the inspection of the corresponding relationship between multi-angle angiog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/00
CPCA61B6/504A61B6/5211A61B6/582G06T2207/10012G06T2207/10081G06T2207/10116G06T2207/20101G06T2207/30101G06T7/74G06T7/80A61B6/5217
Inventor 涂圣贤杨璐璐杨俊青张素
Owner SHANGHAI JIAO TONG UNIV
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