What distinguishes the image recording process of a flat panel detector from an image intensifier?

The distinguishing factor in the image recording process between flat panel detectors and image intensifiers lies in the use of a thin-film transistor (TFT) by flat panel detectors. TFT technology allows for the capture of images in a more efficient and accurate manner. In flat panel detectors, the TFT serves as a switch to read out charge from each pixel individually, enabling high-resolution digital images to be produced quickly. This direct conversion of x-rays into digital signals enhances image quality and reduces the time between exposures, making it advantageous for various imaging applications.

In contrast, image intensifiers primarily rely on analog processes to amplify and convert light into a visible image. They typically use photoelectric effect mechanisms and may incorporate methods that involve phosphor screens and analog signal transmission, which can affect image resolution and processing speed. The presence of TFT in flat panel detectors supports more advanced digital imaging capabilities and a higher degree of automation compared to the older technology used in image intensifiers.