What type of capture system do digital flat panel fluoro systems employ?

Digital flat panel fluoroscopy systems primarily utilize indirect capture technology, which employs a cesium iodide (CsI) scintillator coupled with an amorphous silicon (a-Si) detector. In this system, cesium iodide absorbs the x-ray photons produced during fluoroscopy and converts them into visible light. This light is then detected by the amorphous silicon photodiode array, which converts it into an electrical signal that can be processed to form images.

The combination of cesium iodide and amorphous silicon enhances image quality by maximizing light collection efficiency and minimizing noise. This results in high-resolution images with improved contrast and reduced patient radiation dose compared to older technologies. Therefore, this indirect capture method is well-suited for dynamic imaging in fluoroscopy, which requires high performance due to the need for real-time visualization.

The other capture systems mentioned in the options, such as direct capture with amorphous selenium or hybrid systems, each have specific applications and characteristics that do not align with the typical configuration of digital flat panel fluoroscopy systems.