How does a "flat panel detector" function in digital radiography?

A flat panel detector functions by converting x-rays directly into a digital signal, which is a crucial step in digital radiography. This process typically involves using a photoconductive material such as amorphous selenium or a scintillator like cesium iodide. When x-rays strike the detector, they ionize the photoconductive material or cause it to emit light, which is then converted to an electrical signal. This digital signal is processed to create an image that can be viewed and analyzed on a computer.

The importance of this functionality lies in its ability to streamline the imaging process, reduce the need for film, and provide more immediate access to images for diagnosis. This direct conversion method eliminates several steps required in traditional film-based radiography, where films need to be exposed, developed, and processed. Additionally, the immediate availability of digital images facilitates quicker decision-making in clinical settings.