Development of methods for analysis of knee articular cartilage degeneration by magnetic resonance imaging data

Publisher Copyright: © Published under licence by IOP Publishing Ltd.The aim of this paper is to describe the new methods for analyzing knee articular cartilage degeneration. The most important aspects regarding research about magnetic resonance imaging, knee joint anatomy, stages of knee osteoarthritis, medical image segmentation and relaxation times calculation. This paper proposes new methods for relaxation times calculation and medical image segmentation. The experimental part describes the most important aspect regarding analysing of articular cartilage relaxation times changing. This part contains experimental results, which show the codependence between relaxation times and organic structure. These experimental results and proposed methods can be helpful for early osteoarthritis diagnostics.publishersversionPeer reviewe

An efficient approach to direct NURBS

Ray tracing is a popular method for generating high quality images. NURBS surface is a popular tool for 3D modeling. There are different approaches to NURBS surface visualization by ray tracing methods. But these methods of computer graphics do not solve this task at an expected level. Therefore in this paper the authors propose to use a new effective approach for NURBS surface visualization by ray tracing method to render objects with high accuracy and quality

Efficient approach to direct B–spline surface rendering by a ray tracing

There are different approaches to B-spline surface visualization by ray tracing methods. But these methods of computer graphics do not solve this task at an expected level. Therefore in this paper the authors propose to use a new approach for B-spline surface visualization by ray tracing method to render objects with high accuracy and qualit

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Medical objects volume estimation is an actual task for biomedical engineering and medical diagnostic. At the same time, the input data for this task is often described in form of 2D layers. In this work a new approach for volume estimation of a 3D model is proposed. The proposed method is based on precise integral calculation of 3D models volume. The experiments show that this approach gives best result in comparison with other approaches

A New Approach for High-Quality Visualization of Bézier Surfaces

In this work a new approach for high-quality visualization of non-rational Bézier surfaces is proposed. There are many different approaches to solving this problem. In this work we propose a new approach for finding the values of unknown parameters, which are necessary for visualization of a Bézier surface (for example, of a bi-quadric surface). The method is based on transforming the problem of finding roots of equation to a problem of optimization

Brīvo formu virsmu interpolācija un to vizualizācija ar datorgrafikas standartlīdzekļiem

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A New Approach to Bézier Surface Visualization by a Ray Tracing Method

Problem of free – form surfaces visualization is actual in various areas of a science and engineering. One of mathematical models used for this purpose is the mathematical description of a Bézier surface. Classical methods of computer graphics based on polygonal models use only polygonal interpolation of a Bézier surface. Such approach inevitably leads to occurrence of an error and as a consequence – to discrepancy of an image

An New Approach of Visualization of Free-Form Surfaces by a Ray Tracing Method

There are different tasks requiring 3D visualization of high accuracy. The classical methods of the computer graphics do not solve this task at an expected level. Therefore in this paper authors propose to use a new approach for free-form surfaces visualization by a ray tracing method to render objects with high accuracy and quality