1. A computer implemented method of performing image registration between volumetric image data associated with an object and surface topology image data associated with the object, wherein the surface topology image data is obtained by a surface topology imaging system, the method comprising: obtaining spatial information associated with the orientation of the surface topology imaging system relative to the object; processing the volumetric image data and the spatial information to generate one or more partial surfaces oriented toward the surface topology imaging system, such that the one or more partial surfaces exclude surface data hidden from the surface topology imaging system; and employing the one or more partial surfaces to perform image registration between the volumetric image data and the surface topology image data, thereby identifying a transformation between the volumetric image data and the surface topology image data.