What is the principle behind solid-state crystal detectors in CT imaging?

The principle behind solid-state crystal detectors in CT imaging operates on the concept of fluorescence. When x-rays penetrate the solid-state crystal material within the detector, the energy from the x-rays interacts with the crystal lattice and causes the crystal to emit light. This phenomenon is a key feature of solid-state detectors, where the emitted light is then converted into electrical signals for image processing.

This mechanism is advantageous because it allows for improved detection efficiency and better spatial resolution in imaging, making it a favorite choice in modern CT systems. By employing crystals that specifically fluoresce when exposed to x-rays, these detectors can efficiently capture the resultant light and contribute to high-quality imaging.