Method for eliminating motion artifacts in digital subtraction angiography and system thereof

A technology of digital subtraction and angiography, applied in the field of medical image processing, to achieve the effect of improving fine registration, eliminating motion artifacts, and removing motion artifacts

Inactive Publication Date: 2010-09-08
HENAN UNIVERSITY
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  • Abstract
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Problems solved by technology

[0007] The purpose of the present invention is to provide a digital subtraction angiography motion artifact elimination method and system thereof, to solve the technical problem of motion artifact elimination in digital subtraction angiography images, and to solve the problem of fine-grained images and masked images. registration technical issues

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  • Method for eliminating motion artifacts in digital subtraction angiography and system thereof
  • Method for eliminating motion artifacts in digital subtraction angiography and system thereof
  • Method for eliminating motion artifacts in digital subtraction angiography and system thereof

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Embodiment Construction

[0051] The main method to eliminate artifacts is to find the motion law of some pixels in the background to achieve accurate image registration and subtraction. Although most of the DSA image sequence is the surplus image with the contrast agent concentration not reaching the peak, such as figure 1 Shown. But in these images, only the blood vessels are not fully highlighted (changing), and the gray values ​​of other parts such as bones and muscles have not changed significantly (the positions of some pixels will change). We can fully use the time-space related information in the DSA image sequence to study the motion law of the control points (ControlPoints) located in the background part, and then achieve image registration through image winding.

[0052] See Figure 8 As shown, the specific implementation steps of the present invention are as follows: The DSA image data is provided by the Huaihe Hospital of Henan University Affiliated Hospital (a third-class hospital), and the ...

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Abstract

A method for eliminating motion artifacts in digital subtraction angiography comprises the following steps: step 1, reading; step 2, selecting points; step 3, constructing a DSA space body; step 4, carrying out space slicing; step 5, connecting tracks; step 6, analyzing the space motion characteristics of DSA pixel; step 7, carrying out triangulation; step 8, carrying out affine transformation; step 9, carrying out space winding; step 10, optimizing; step 11, registering; step 12, carrying out grey correction; step 13, carrying out logarithmic subtraction angiography. The invention belongs to the technology of image processing. The method of space analysis is used so that the registering of DSA image is more accurate, thereby efficiently eliminating motion artifacts and obtaining clear angiography images. Thus, the diagnostic accuracy of a doctor is improved, and the working efficiency is increased.

Description

Technical field [0001] The invention relates to the technical field of medical image processing. In particular, it is a method for removing motion artifacts in contrast images and an artifact removing system. Background technique [0002] With the development of modern science and technology, some advanced technical means and computer science and technology are constantly being applied in the medical field. Especially in radiological diagnosis and treatment disciplines, computer image processing technology is playing an increasingly important role. [0003] At present, digital subtraction angiography (Digital Subtraction Angiography, DSA) is a key technology for vascular visualization. DSA equipment was first introduced in 1984 in China and quickly promoted nationwide. In ordinary X-ray images, because the contrast between blood vessels and surrounding tissues is very small, it is more difficult to observe the blood vessels in detail. In order to obtain a clearer blood vessel im...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/00G06T5/00G06T7/00
Inventor 张帆张新红
Owner HENAN UNIVERSITY
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