ABSTRACT
The term “industrial CT” was formerly defined as the tomography of those objects that are not alive or are scanned by computed tomography (CT) systems that are not of medical type—where the sample rests during investigation and the dose rate has to be minimized, while the spatial resolution must not fall below a given minimum (see Section III, Chapter 32 for a description of diagnostic CT). Furthermore, the sample densities are known and fixed for all. Especially in the early days of CT, most industrial objects, which could have been made from heavy steel or lightweight plastic, had no restrictions on dose rate. So industrial CT started with tubes of higher voltage, which did not allow them to be turned. As voltage increases, the shielding and collimation of the detectors grow in weight as well. Therefore, it is the sample that has to be turned in an industrial CT setup.
