Principles of Tomographic Reconstruction

Imagine you need to look inside a living organism. You would have only two options: using invasive techniques or applying tomography. In this non-invasive imaging method, two-dimensional (2D) images of slices, or sections, within an organism are analyzed to determine the three-dimensional (3D) localization of internal objects. These sections can be so thin that the target objects are unobscured by the superposition of over- or underlying structures. The challenge of seeing internal objects that are free of superposition originated in medicine, where such 3D localization is necessary for accurate diagnosis and treatment.