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Based on DT-MRI data visualization of myocardial fibers and Analysis System

Author: KongZuoHan
Tutor: WangKuanQuan
School: Harbin Institute of Technology
Course: Computer Science and Technology
Keywords: Myocardial fibers Nuclear magnetic resonance diffusion tensor imaging Visualization Figure Displayed Flow line tracking
CLC: TP391.41
Type: Master's thesis
Year: 2011
Downloads: 28
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Abstract


The heart is the most important function of human organs. In recent years, heart disease has become a major threat to human health. Myocardial fiber contraction and relaxation of force and the force of the heart's pumping function are closely linked. Changes in the structure of myocardial fibers can cause arrhythmia, heart failure and other symptoms, more serious cause of human death. Therefore, the establishment fine fiber orientation model of myocardial heart anatomy and diagnosis and treatment of heart disease is significant. Nuclear magnetic resonance diffusion tensor imaging (Diffusion Tensor Magnetic Resonance Imaging, DT-MRI) is proposed in recent years a new medical imaging technology. It uses nuclear magnetic resonance techniques to measure intracellular molecules diffuse multiple directions Shui movement characteristics, can fully adequately studied fine structure of living tissue in biopsy fine structure study can not be compared with other technical advantages. It cardiomyopathy, arrhythmia, acute myocardial infarction and other causes of ventricular remodeling after diagnosis has great potential clinical value. DT-MRI technique has been applied to the reconstruction of white matter nerve, but also for the reconstruction of myocardial fiber orientation in the initial stage, the less relevant literature, the lack of systematic study. Based on canine ventricular DT-MRI data sets to carry out three-dimensional cardiac fiber structure visualization methods and visual system design and implementation of research, as follows: (1) the use of threshold filtering, median filtering and neighborhood averaging method to the original DT-MRI data de-noising preprocessing the data to eliminate noise caused by the deviation of the tracking results. (2) the use of volume rendering techniques, primitive show France and fiber tracing method on canine ventricular DT-MRI data visualization, calculate the degree of anisotropy of myocardial fibers and direction of rotation, the three-dimensional reconstruction of the canine ventricular myocardial fiber orientation structure . (3) According to custom ROIs maximum eigenvectors and anisotropy measure values ??for a small number of muscle fibers to draw from the microscopic point of analysis, research toward canine ventricular fiber characteristics. (4) based on DT-MRI data of myocardial fibers visualization applications carried out a detailed requirements analysis and system design, based on VTK (Visualization Toolkit) to achieve a DT-MRI data of myocardial fibers visualization and analysis system for the study of cardiac structure provides a powerful tool.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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