What is the main difference between direct and indirect digital radiography?

The distinction between direct and indirect digital radiography lies in the technology used to capture images. Direct digital radiography employs flat panel detectors that directly convert x-ray energy into an electrical signal, which is then processed to create an image. This method allows for immediate image acquisition, providing real-time feedback during imaging procedures.

In contrast, indirect digital radiography utilizes a two-step process involving photostimulable phosphors. In this system, x-ray energy is first absorbed by a phosphor layer, which stores the energy and later releases it as light when stimulated by a laser. This light is then detected and converted into an electronic image.

The choice of technology impacts not only the speed of image acquisition and the quality of the resulting images but also the overall efficiency of the radiographic workflow. This foundational difference in image capture and processing is key in understanding the operational and clinical aspects of digital radiography systems.