Víctor Torrealba

  • Citations Per Year
Learn More
This paper addresses the processing and reconstruction of the heart from echocardiographics images. This work is divided into two processing chains: reconstructionvisualization, each one of them is divided in several modules denominated as: 3D Acquisition, 3D Filtration, 3D Segmentation, 3D Reconstruction, 3D Modeling and 3D Visualization. The second(More)
This work presents 3D cardiac images rendering based on volumetrics of plane sections obtained from the cardiac wall segmentation. This work introduces a non-rigid model based on physics as a segmentation method. An object is constructed in the shape of a polygon of n vertices, with masses on each of them, interconnected with springs to each other. The(More)
A contour-based automatic recognition system was applied to classify intraductal breast carcinoma into high nuclear grade and low nuclear grade in a digitized histologic image. The image discriminating characteristics were selected by their invariability condition to rotation and translation. They were acquired from cellular contours information. The(More)
In this work a comparative study of some methods of Left Ventricle segmentation in echocardiographic images is developed. The project is developed in four modules denominated: Acquisition, Segmentation, 3D Reconstruction, and VRML Visualization. 1) The images acquisition of volume sequences of the left ventricle was obtained during an echocardiographic(More)
This work presents a new segmentation method of volumetric echocardiographic images, using a 3D front propagation initialized as a small sphere that grows until arriving to the walls of the left ventricle (LV), adjusting the parameters to the model. The project is developed in three modules denominated: Acquisition, Segmentation and Visualization. 1) The(More)
This paper presents a new methodology for the analysis of echocardiographic image sequences. The echocardiographic medical exam is a frequent practice in the cardiology clinic, and generally there is bi-dimensional echocardiographic equipment. We have developed a new processing chain that will allow a medical diagnosis issued from a 3D reconstruction of the(More)
We have studied the effect of the preoperative administration of bile salts on postoperative renal function in jaundiced patients undergoing surgery. Nine patients did not receive bile salts and in this group there were 2 cases of acute renal failure in the postoperative period. Furthermore, creatinine clearance values fell in this group from a mean value(More)
The formation of the echocardiographic signal, that goes from the transducer to the 2D echo image, was simulated upon a 3D cardiac tissue image. Images of tissue are obtained by mathematical simulation, and a series of histological slices of cardiac tissue. These slices were observed using an optical microscope at calibration of 10 microns per pixel. Slices(More)
Presents a study of intensity variations in the echocardiographic image during myocardial contraction. Both simulated and actual tissue were used to study this phenomenon. One of the approaches was to simulate echocardiographic response to cardiac tissue variations. In order to perform this task, we developed four modules which we have designated as:(More)
  • 1