Dissertation
Dissertation > Medicine, health > Internal Medicine > Heart, blood vessels ( circulatory ) disease > Heart disease > Heart valve disease

Extraction and Analysis of Mitral Valve in Real Time 3D Echocardiography

Author GaoYan
Tutor YangXin
School Shanghai Jiaotong University
Course Pattern Recognition and Intelligent Systems
Keywords Real-time three-dimensional echocardiography 3D segmentation Geodesic active contour models level set Mitral Quantization parameter
CLC R542.5
Type Master's thesis
Year 2007
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Mitral valve disease is one of the most common diseases in the cardiovascular disease . Example , mitral regurgitation caused by mitral regurgitation , will allow the heart to the body organs of blood supply to the lack of a direct threat to the functional regulation of the human body . Mitral valve repair and replacement with the development of medicine has made great progress in the evaluation of the severity of mitral regurgitation in mitral valve disease surgery planning is particularly important . Currently, based on real-time three-dimensional echocardiography Tuduopule imaging mitral check reflux evaluation of the most important tools , it is easy to operate, with no side effects . However , yet an accurate clinical routine examination standard to evaluate the severity of mitral regurgitation , most doctors are still based on the color Doppler regurgitant area by virtue of experience or a semi - quantitative method to judge regurgitation severity. In this paper, real - time three-dimensional echocardiography evaluation of the severity of mitral regurgitation mitral extraction can be used a number of parameters , measurement and analysis : First of all , in order to be able to observe the internal structure of the heart three-dimensional solid positioning and mitral valve using three-dimensional texture mapping direct volume rendering dynamic three-dimensional heart , the heart of three-dimensional solid visualization . On the basis of three - dimensional visualization of the dynamic heart within one cardiac cycle selected having the typical characteristics of the use of interactive frames, each frame of three-dimensional volume data is selected , respectively, from the direction of the major axis slice sagittal and coronal directions in the mitral root constraint points used to construct the contains mitral columnar region . The construction method of the columnar region is fitted with a plane in space is not in the same plane on the constraint points determine the plane normal direction , and as the cylinder direction , to construct the 3D mask . After that, the 3D columnar mask geodesic active contour model as the area constraints add Segmentation in the level set under the framework of the mitral valve . Finally, this paper studies the extract on the basis of the mitral valve , automatically quantify mitral geometric parameters : mitral valve opening area , the annulus area . By a large number of three-dimensional ultrasound valvular experimental results show that this study able to achieve good segmentation algorithm accurately extract 3D mitral mitral calculated on the basis of geometric parameters in the evaluation of the severity of mitral regurgitation with some clinical value .

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