Heart real-time dynamic rebuilding technology based on model interpolation compensation
An interpolation compensation and real-time dynamic technology, applied in the interpolation compensation algorithm based on the prior value of the real heart model, the field of landmark recognition and spatial positioning, can solve the problem that the landmark recognition and matching technology does not meet the basic requirements of real-time reconstruction of the heart, artificial Automatic matching of landmark points is difficult to achieve, and the error of the 4D model of the heart is large, so as to improve the efficiency and accuracy of sample point collection, avoid the final uneven distribution, and the effect of unique features
Active Publication Date: 2012-08-01
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
[0010] 1. Automatic matching of artificial landmarks without unique features is difficult to achieve
[0011] 2. The recognition and matching technology of manually completed landmark points does not meet the basic requirements of real-time reconstruction of the heart
[0012] 3. The reconstructed four-dimensional model of the heart has large errors and rarely has a sense of reality
Method used
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[0025] The advantages of the present invention can be further understood through the following detailed description of the invention and the accompanying drawings.
[0026] attached figure 1 To mark the specification drawing on the back of the design, a pattern made of fine lead wire is attached to the plexiglass (polymethyl methacrylate).
[0027] The main parameters are as follows:
[0028] Substrate thickness (thickness of plexiglass plate): about 0.5cm, it should not be too thick, otherwise it is not conducive to fixing and calibration.
[0029] There are 3 types of this round marking board:
[0030] ①Line width 1mm, d1=4cm, d2=1cm, d3=3mm
[0031] ②Line width 1mm, d1=3cm, d2=0.75cm, d3=3mm
[0032] ③Line width 1mm, d1=2cm, d2=0.5cm, d3=3mm
[0033] This design has several advantages. First, the circular pattern design is easy to identify, and it can also be identified in the presence of a small amount of cross-occlusion. At the same time, the ring is equipped with an...
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The invention relates to heart real-time dynamic rebuilding technology based on model interpolation compensation. A contact type heart four-dimensional mapping rebuilding scheme based on X-ray perspective projection is raised so as to overcome shortcomings of ventricle mapping equipment in terms of imaging. Recognition and match technology for marking points with unique features and capable of being recognized easily is designed, an interpolation compensation algorithm based on a real heart model prior value is applied to the heart four-dimensional rebuilding technology, so that a heart four-dimensional rebuilding result is more accurate, and operation is simpler. Heart four-dimensional dissection rebuilding can be realized in real time under guidance of the technology, accordingly, shortcomings of current heart three-dimensional rebuilding technology and equipment are overcome, gaps of the four-dimensional heart rebuilding technology and equipment are filled, and surgery efficiency is improved. The heart real-time dynamic rebuilding technology has an important significance in increasing cardiovascular three-dimensional visualization level of China and developing diagnosis, treatment and research of relevant diseases.
Description
technical field [0001] The invention relates to marker point identification and spatial positioning technology, in particular to a set of marker points with unique characteristics and easy identification and an interpolation compensation algorithm based on a priori value of a real heart model, which is suitable for the field of medical heart reconstruction. Background technique [0002] Using the fixed X-ray-opaque markers placed near the heart and relative to the heart as a positioning reference point, the catheter is placed close to the endocardium, and X-rays are projected at different angles to the catheter tip and the positioning reference point to obtain two images containing Locate the reference point and the plane of projection of that endocardial point. The reconstruction problem is transformed into a two-view geometric model, which is as figure 1 As shown, the positional relationship between the two projected views can be represented by a rotation matrix R and a t...
Claims
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Inventor 杨健范敬凡王涌天刘越
Owner BEIJING INSTITUTE OF TECHNOLOGYGY