Iterative method for extracting motion parameters of angiography images guided by multi-parameter model

A technology of motion parameters and angiography, which is applied in image data processing, image analysis, instruments, etc., can solve the problems that translational motion cannot be automatically extracted, and breathing and heart cannot be accurately separated

Active Publication Date: 2017-07-07
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0008] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method for iteratively extracting motion parameters of angiographic images guided by a multi-parameter model. Technical issues with inability to accurately separate movements such as breathing and heart

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  • Iterative method for extracting motion parameters of angiography images guided by multi-parameter model
  • Iterative method for extracting motion parameters of angiography images guided by multi-parameter model
  • Iterative method for extracting motion parameters of angiography images guided by multi-parameter model

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[0080] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

[0081] Below at first explain and illustrate with regard to the technical terms of the present invention:

[0082] The minimum mean square error: that is, the sum of the mean square accumulation of the difference between the estimated signal and the original signal is the smallest. In this paper, the multi-iterative parameter model utilizes the nature of discrete Fourier transform, adopts the m...

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Abstract

Disclosed is a multi-parameter model guided-method for iteratively extracting a movement parameter of an angiography image of a blood vessel. The method comprises: automatically selecting I structural characteristic points of a blood vessel from a medical image of a radiography image sequence, and separately and automatically tracking the characteristic points in the whole radiography image sequence so as to obtain a tracking sequence of each characteristic point; processing the tracking sequence of each characteristic point by using a discrete Fourier transform, so as to generate a discrete Fourier transform result Si(k); initializing an iterative parameter j to 0, acquiring an amplitude and a frequency scope of each frequency point in the discrete Fourier transform result Si(k), and performing the Fourier transform on the tracking sequence of the frequency point in the amplitude and the frequency scope of each frequency point so as to obtain a Fourier transform result; and performing an inverse Fourier transform on the obtained Fourier transform result, and acquiring an estimated minimum mean square error of the frequency point. The technical problems existing in an existing method can be solved that a translational movement cannot be automatically extracted, and movements of breathing, the heart and the like cannot be accurately separated.

Description

technical field [0001] The invention belongs to the intersection field of digital signal processing and medical imaging, and more specifically relates to a method for iteratively extracting motion parameters of angiography images guided by a multi-parameter model. Background technique [0002] In the X-ray contrast system, due to the influence of respiratory movement, the images of coronary vessels on the imaging surface will undergo two-dimensional movement. During the angiography process, in order to enable the angiography sequence to cover the entire coronary artery system, the doctor may move the catheter bed, which will result in a two-dimensional translation between different frames of an imaging sequence. Therefore, on the one hand, the coronary angiography image records the projection of the heart's own motion on the two-dimensional plane, and at the same time, it also superimposes the two-dimensional movement of the coronary artery on the angiography surface caused ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T7/262
CPCG06T7/20
Inventor 张天序黄正华邓丽华张耀宗宋琼
Owner HUAZHONG UNIV OF SCI & TECH
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