ABSTRACT
In this chapter, a short introduction to computed tomography (CT) and X-ray physics is given. CT is an advanced imaging technique that allows for non-invasive visualization of the interior of a scanned object. In Figure 34.1, the typical steps involved in CT imaging are described. In a first step (see Figure 34.1a) X-ray projection images (also known as Röntgen photos or radiographs) are acquired at different angles from an object of interest. All steps involved in this acquisition process are described in Section 34.2. The second step in CT imaging is the reconstruction step, which is conceptually visualized in Figure 34.1b and thoroughly explained in Section 34.3. Finally, in Section 34.4, the concepts of the previous section are extended to dynamic CT, where the object is no longer assumed to be stationary throughout the acquisition process.
