Final answer:
In digital radiography, the term 'brightness' replaces the concept of density from conventional radiography and refers to the appearance of the image on the display monitor.
Step-by-step explanation:
The term used in digital radiography to describe the overall blackening of a conventional radiograph, which was referred to as density, is brightness. In digital radiography, brightness refers to the appearance of the image on the display monitor, which is the counterpart of density in conventional radiography. The control of brightness is different from that of density, as it is adjusted electronically on the computer rather than by the amount of radiation exposure. It is closely related to the proper exposure of the radiographic image.