ABSTRACT
As one of the basic monitoring tools, today’s medical imaging effectively assists clinicians and radiologists in diagnosing diseases, taking therapeutic or surgical decisions, and guiding surgery operations. Recent advances in medical imaging modalities provide images with a menagerie of sizes, structures, resolution, and degrees of contrast. A two-dimensional (2D) image is a rectangular array of pixels containing measured scalar or vectorial visual signals (e.g., intensities or colors) that quantify properties of related spatial locations in a whole body or its part. The 2D image of a thin planar cross section of a 3D object is usually called a slice. A collection of the successive slices forms a 3D image, being an array of voxels.
