Surgical Navigation In Augmented Reality Research

Image-guided surgery (IGS), using different image techniques, helps for surgery plan, minimized-invasive diagnosis and surgery quality. Augmented Reality (AR) is a technology which a computer-generated image is superimposed onto the user's vision of the real world, giving the user additional information generated from the computer model. The AR system brings the computer into the "world" of the user by augmenting the real environment with virtual objects. The purpose of this paper is to apply the Augmented Reality technology to the IGS field. So the surgery' view of the real world is enhanced.First, we will generate a virtual model by marching_cube surface rendering algorithm, after we segment CT images. A simplified method is used to eliminate the ambiguity problem. Then, we will investigate the virtual-real registration. The registration process is the determination of a one-to-one mapping between the coordinates in the 3D space and those in a 2D image so that points in the two spaces that correspond to the same anatomic point are mapped to each other. We will use the single view calibration to make the virtual-real registration based on fiducials attached to the surface of the head. In addition, we investigate the tracking of the points on the deferent imagesOur experiment shows that the implementation of our registration has a subpixel accuracy. We also get the Augmented Reality display and track the same point on different images successfully.