RESUMO
This paper introduces a novel technique for the visualization of blood (or other fluid) flowing through a complex 3D network of vessels. The Directed Particle System (DPS) approach is loosely based on the computer graphics concept of flocking agents. It has been developed and optimised to provide effective real time visualization and qualitative simulation of fluid flow. There are many potential applications of DPS, and one example - a decision support tool for coronary collateralization - is discussed.
Assuntos
Artérias/anatomia & histologia , Artérias/fisiologia , Gráficos por Computador , Imageamento Tridimensional/métodos , Modelos Cardiovasculares , Reologia/métodos , Interface Usuário-Computador , Velocidade do Fluxo Sanguíneo/fisiologia , Simulação por Computador , HumanosRESUMO
A proposed method visualizes the surface appearance of living human brain tissue. The goal is to investigate whether realistic models of living anatomy are possible and, if so, whether they provide added value to anatomy education and training simulators. From calibrated photography of exposed brain tissue and suitable alternatives, experiments provided data for a bidirectional reflectance distribution function, which was then used for rendering. Employing a GPU, real-time visualization of the brain's surface supported ambient occlusion, advanced texturing, subsurface scattering, and specularity.
Assuntos
Encéfalo/anatomia & histologia , Modelos Anatômicos , Cadáver , Humanos , Salas Cirúrgicas , FotografaçãoRESUMO
This paper presents an advanced method of visualizing the surface appearance of living brain tissue. We have been granted access to the operating theatre during neurosurgical procedures to obtain colour data via calibrated photography of exposed brain tissue. The specular reflectivity of the brain's surface is approximated by analyzing a gelatine layer applied to animal flesh. This provides data for a bidirectional reflectance distribution function (BRDF) that is then used the rendering process. Rendering is achieved in realtime by utilizing the GPU, and includes support for ambient occlusion, advanced texturing, sub surface scattering and specularity. Our goal is to investigate whether realistic visualizations of living anatomy can be produced and so provide added value to anatomy education.
Assuntos
Encéfalo/anatomia & histologia , Gráficos por Computador , Interpretação de Imagem Assistida por Computador/métodos , Imageamento Tridimensional/métodos , Iluminação/métodos , Modelos Anatômicos , Fotografação/métodos , Algoritmos , Simulação por Computador , Humanos , Aumento da Imagem/métodos , Reconhecimento Automatizado de Padrão/métodos , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Interface Usuário-ComputadorRESUMO
This paper reports on a low cost system for training ultrasound imaging techniques. The need for such training is particularly acute in developing countries where typically ultrasound scanners remain idle due to the lack of experienced sonographers. The system described below is aimed at a PC platform but uses interface components from the Nintendo Wii games console. The training software is being designed to support a variety of patient case studies, and also supports remote tutoring over the internet.