Abstract: An apparatus has a first ring of infrared emitters and a second ring of infrared detectors positioned adjacent to the first ring. A controller applies signals to the first ring and collects signals from the second ring.
Abstract: An apparatus includes a processor and a memory connected to the processor. The memory stores instructions executed by the processor to perform a transformation on a detected signal that has penetrated an object of interest to form a sinogram. The sinogram is a sine-based representation of the detected signal. A feature of interest is identified in the sinogram. A tomogram corresponding to the detected signal is reconstructed. The instructions to reconstruct utilize the feature of interest to determine at least one attribute of the tomogram.