Uma metodologia para processamento de imagens ventrículo esquerdo em hemodinâmica.

Abstract

Cardiac catheterization is a hemodynamic procedure in which analog images of cardiac chambers and vessels, recorded in 35 mm films, are produced. Analysis of the left ventricle images is quite important to evaluate its function. This work proposes a methodology to isolate the left ventricle and to calculate parameters that refer to its function. Analog images were digitized and stored using the TIFF file format. A region segmentation technique was applied to isolate the left ventricle. Prior to segmentation, a pre-processing step was accomplished, in order to eliminate noise and to make an image gray level uniformization. Left ventricle volume, mass and ejection fraction were calculated using the segmented images and validation was performed using reference values.