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Method for registrating external circumstance DSA elasticity automatically

An elastic registration and automatic technology, applied in the field of medical imaging, can solve the problems of low reliability of image motion estimation and time-consuming medical practicability of the algorithm, and achieve the effects of high practical value, high reliability and improved work efficiency.

Inactive Publication Date: 2008-04-16
珠海友通科技有限公司
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Problems solved by technology

There are also more advanced techniques for peripheral DSA registration that employ more complex image deformation models, but are less medically useful due to unreliable image motion estimation or algorithms that are too time-consuming

Method used

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  • Method for registrating external circumstance DSA elasticity automatically
  • Method for registrating external circumstance DSA elasticity automatically
  • Method for registrating external circumstance DSA elasticity automatically

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Embodiment Construction

[0027] Please refer to Fig. 1, the present invention provides an automatic peripheral DSA elastic registration method, comprising the following steps:

[0028] (1) Input mask and comparison sheet;

[0029] (2) Reasonably divide sub-regions to the mask;

[0030] (3) Detecting mask feature points;

[0031] (4) Feature point motion vector estimation;

[0032] (5) Transformation model parameters are optimized to solve, and the motion vector of each pixel of the whole picture is obtained;

[0033] (6) According to the motion vector of each pixel of the whole image, the mask is elastically deformed;

[0034] (7) END.

[0035] The above-mentioned automatic peripheral DSA elastic registration method has the following technical difficulties to be solved: ① There are few features of the limbs. When the features are not selected properly, the motion estimation will be unreliable due to the aperture effect, that is, to locate a certain line segment on a straight line ; ②Due to the ex...

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Abstract

The present invention relates to an automatic peripheral DSA elastic registration method comprising the following steps: (1) inputting a mask image and a contrast image; (2) classifying rationally the mask image into sub-region; (3) detecting the mask image characteristic point; (4) estimating the characteristic point motion vector; (5) transforming model parameter optimization solving to obtain whole image motion vectors of each pixel; (6) processing elastic deformation to the mask image according to whole image each pixel motion vector; (7) ending. The beneficial effect of the present invention comprises: excellent artifact eliminating ability, without the dilemma result of the pixel shifting method; full automation, without any complex interaction, promoting the doctor working efficiency greatly; high reliability, all using pointed advanced calculation during the characteristic extracting, motion estimating and whole each pixel motion optimization course anyway, promoting the whole registration reliability; time costing little, achieving the medical practical standard.

Description

technical field [0001] The invention relates to the technical field of medical imaging, in particular to an elastic registration method based on digital subtraction angiography. Background technique [0002] Angiography is used to visualize the blood vessels of the body so that possible abnormalities of the blood vessels, such as narrowed or dilated blood vessels, can be identified in the display. In order to improve the visibility of blood vessels in an X-ray image, a contrast agent is added to the blood before the X-ray image is taken, so that the blood vessels stand out clearly from the background in the X-ray image. However, in addition to blood vessels, other structures or organs are often visible in X-ray images, such as bones, which may partially cover blood vessels in the image. To avoid this problem, subtractive contrast techniques are employed. In Digital Subtraction Angiography (DSA, Digital Subtraction Angiography), two digital X-ray pictures of the same body a...

Claims

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Application Information

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IPC IPC(8): A61B6/00G06F17/00G06T5/00
Inventor 孔刚邹鲁民
Owner 珠海友通科技有限公司
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