Final answer:
Solid state detectors in CT scanners convert ionization directly into an electrical signal, they are commonly used in modern CT scanners, and can operate in both third-generation and fourth-generation systems.
Step-by-step explanation:
Regarding solid state detectors and their use in computed tomography (CT) scanners, it is true that x-ray photons cause solid state detectors to convert ionization produced in a semiconductor directly into an electrical signal; no light flash is involved. Therefore, the first statement is not accurate. The second statement is correct; solid state detectors are indeed commonly used in most modern CT scanners, due to their ability to efficiently convert x-ray photons directly into electrical signals for high-resolution imaging. Lastly, solid state detectors are versatile and can be used in both third-generation and fourth-generation CT systems, making the third statement true as well.