XIX Sympozjum Srodowiskowe PTZE - materialy.pdf

XIX Sympozjum PTZE, Worliny 2009
DYNAMIC MODEL BUILDING OF ANATOMICAL OBJECTS
Iliana Marinova, Valentin Mateev
Technical University of Sofia, Department of Electrical Apparatus,
1756 Sofia, 8 Kliment Ohridski St., Bulgaria,
e-mail: iliana@tu-sofia.bg, vmateev@tu-sofia.bg
Abstract
In this paper we develop a method for automatic 3D/4D model building. These models are suitable for
electromagnetic field distribution investigations with Finite Element Method (FEM). Models are made by time
sequence of mesh structures and specific electromagnetic material properties for each tissue type. Mesh is built
according to specific FEM criteria for achieving good solution accuracy. Software tool employing the method is
developed. The method is applied for part of cardiac muscle.
Introduction
New generation of diagnostic medical equipment can acquire rich data sets. This information
must be processed for visualisation purposes and also may be very useful for forward and
inverse calculations of diagnostic and therapy simulations. [1-5]
In this paper we apply a method for automatic dynamic 3D/4D model building. These models
are suitable for electromagnetic field distribution investigations with FEM. Models are made
by time sequence of mesh structures and specific electromagnetic material properties for each
tissue type. Mesh is built according to specific FEM criteria for achieving good solution
accuracy. Software tool employing the method is developed.
The method is applied for part of cardiac muscle.
Model building
3D models are built by sequence of 2D slices acquired by diagnostic ultrasound scan. Image
segmentation is made semi-automatic, where operator must recognize and filter the tissue by
its density. Some of used slices are shown in Fig.1-a. After that slices are arranged in 3D
space, Fig.1-b.
(a) (b)
Fig. 1. Slices stack
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