Which type of flat panel image detector utilizes Cesium Iodide and Silicon?

The choice of indirect conversion is accurate because this method utilizes a combination of a scintillator material, such as cesium iodide, which converts incoming X-ray photons into visible light. This visible light is then captured by a photodetector, typically made of silicon, which converts it into electrical signals that can be processed to form an image.

In the case of cesium iodide and silicon, the cesium iodide layer absorbs X-rays and emits light photons, which the silicon then detects. This indirect method is particularly effective in improving the sensitivity and quality of imaging because the scintillator material enhances the efficiency of the signal conversion process.

This understanding of indirect conversion explains why this technology is widely used in digital radiography, given its advantages in terms of image quality compared to other systems. In contrast, options referring to direct conversion would not involve scintillator materials like cesium iodide, but rather convert X-rays directly into electrical signals using materials such as amorphous selenium. The other choices also do not accurately encapsulate the combination of cesium iodide and silicon in the context of flat panel detectors.