In recent years, echocardiography is a common tool for diagnosing congenital heart disease because it is non-invasive and it provides real-time imaging. However, it is necessary to have specialized knowledge and experience to analyze the three-dimensional anatomical structure of the heart from 2-D echocardiography. Currently, experts on echocardiography explain the diagnosis of the patient to another medical staff by using two-dimensional schematic illustrations. The sharing of complex information about the diagnosis is time-consuming and difficult. We propose a heart chambers editing interface for three-dimensional modeling of congenital heart diseases. In order to facilitate interactivity, the center-position and radius of the heart chamber are used to edit the shape of the heart chambers (atriums and ventricles). In other words, the heart chambers are expressed in spherical coordinates. We provide a shape-editing interface for modifying the surface of the heart chambers. In addition, we provide a topology-editing interface to connect/disconnect between the heart chambers with each other or the heart chamber and the great vessel. Using our system, we can visualize some types of congenital heart diseases, such as ventricular septal defect, and double-outlet right ventricle. In our preliminary user study, experts verified that the constructed three-dimensional model of our proposed system is useful for representing the relationship and positioning between the heart chambers and the great vessels. Therefore, our developed system enables us to easily and quickly construct a three-dimensional heart model to facilitate the sharing of information on the diseases among medical staff.
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