With the advent of the digital computer and the subsequent development of powerful and cost-effective microcomputers, the possibility of replacing conventional films as a photon detector took a big leap forward. The introduction of digital imaging has revolutionized the field of Oral and Maxillofacial Radiology. In this new imaging modality, the radiographic film is replaced by a sensor. The signal temporarily stored within the sensors is transferred to the computer, which displays the image that can be interpreted, manipulated, quantified and stored. Dose reduction often has been emphasized...