This study proposes a simple method to display volumetric data such as MRI images. Currently, 3D representation using binocular vision is quite popular; however, although this method can display a 3D surface model, it is quite difficult to grasp the internal
s***cture of the model from a 3D representation. Furthermore, the resolution is not sufficient for many practical applications, such as diagnosis.
Another currently used method is multilayered graphics, which presents cross sections of volumetric 3D data. Some volumetric 3D displays are capable of showing such graphics [1][2]. Traditionally, many types of spinning [3][4][5] or stacked [6] screen(s) have been invented. However, they are too large in practical use. Although a method using a commercial 2D flat screen is practicable, it requires that the depth or index of the images be explicitly selected by the user [7]. Therefore, an intuitive and simple method to select cross-sectional images is required.
To this end, our idea is to use the convergence of the user’s eyes.As the convergence is semi-automatically modulated according to the distance of the image, it can be used as an index for image selection.
