RESUMO
In this paper is presented the research and development of a new myocardial contrast echocardiography (MCE)-based quantitative analysis system for myocardial microcirculation. The system can measure the values of A, beta, A x beta, A-EER (endo-epi ratio of A), beta-EER and A x beta-EER from the signal intensity of real-time 2-D grayscale images and power Doppler images; it can draw the time-intensity curves to indicate the variation of the intensity of microbubbles scattering in subendocardial layer and subepicardial layer with the varying of myocardial segments; and it can estimate the hemodynamic parameters by nonlinear regression analysis. So the MCE software system has brought the quantitative analysis of real-time MCE to success.
Assuntos
Humanos , Circulação Coronária , Doença das Coronárias , Diagnóstico por Imagem , Ecocardiografia , Métodos , Processamento de Imagem Assistida por Computador , Métodos , Microbolhas , Microcirculação , Dinâmica não Linear , SoftwareRESUMO
Shepp-Logan head phantom is the classical model of simulation computing in Computerized Tomography. This paper proposes a new method--considering 3D Shepp-Logan head phantom as the basic reference model to carry on simulation experiment and algorithms performance evaluating in three-dimension medical image reconstruction field. The paper introduces the design and the implementation of 3D Shepp-Logan head phantom as well the computing of projection data at first, and then describes the simulation process of the three-dimension medical image. The numerical experiment gives the three-dimension medical image reconstruction simulations based on 3D Shepp- Logan head phantom. The result of this experiment indicates the accuracy of model computing and the feasibility of our this method.
Assuntos
Humanos , Algoritmos , Simulação por Computador , Cabeça , Diagnóstico por Imagem , Processamento de Imagem Assistida por Computador , Métodos , Imageamento Tridimensional , Modelos Anatômicos , Imagens de Fantasmas , Tomografia Computadorizada por Raios XRESUMO
This article reports a quantitative analysis software system for myocardial contrast echocardiography (MCE). It can measure the signal intensity of grayscale images and power Doppler images, draw the time-intensity curves of variations on the intensity of microbubbles scattering in subendocardial layer and subepicardial layer with the pulsing intervals, and estimate the hemodynamic parameters by nonlinear regression analysis. This system has been applied to a study on 20 healthy volunteers, and the results suggest that the software has the capacity for bringing the quantitative analysis of MCE to success. The MCE software system conforms to the DICOM standard and can be integrated into PACS.