Fast Virtual Eversion Based On Globally Charged Reference Surface

Virtual eversion is a new methodology in the field of image visualization for hollow structures, which has the advantage of preserving spatial and anatomical features while avoiding tedious and time-consuming navigation. The current eversion algorithm can be divided into two categories according to the placement of point charge, both of which are adopting partial electrical field model.In this paper, researches are only focused on one of the model, which charges all the point on the reference surface. First, we present a further process which can be combined with mathematical morphology. By continuing reducing the distances between neighboring points, we achieve a smoother reference surface.A global electrical field, which can eliminate conflictions between electrical field lines and ensure better distribution, is presented. Feasibility and efficiency is achieved by introducing an algorithm for fast calculation of vector field. All the efforts solve the dilemma in partial electrical field model to make this virtual technology more sophisticated.The global electrical model features generality and robustness, which is showed in the two-dimension experiment. The three-dimension experiment, performed with colon data, demonstrates that virtual eversion based on globally charged electrical field can facilitate visualization and analysis.