Final answer:
The question addresses the materials used for output phosphors in devices like gamma cameras, specifically focusing on which compound helps convert gamma rays into visible light for imaging. Cesium iodide (CsI) is a commonly used scintillator material in medical imaging applications.
Step-by-step explanation:
The question pertains to the composition of the output phosphor used in imaging devices such as an Anger or gamma camera. An output phosphor is a material that emits light when excited by radiation, thus converting a gamma ray into a visible photon. These photons are then further converted to electrical signals for image processing. Here, we are specifically looking at different compounds that can be used as scintillators in these devices.
Options for scintillator materials include Cesium iodide (CsI), Gadolinium oxysulfide (GOS), Zinc cadmium sulfide (ZnCdS), and Lanthanum oxysulfide (La2O2S). CsI is a common scintillator material used in medical imaging due to its efficiency in converting X-rays to visible light. Gadolinium oxysulfide is another scintillator that can be employed, characterized by its ability to produce a bright and sharp image. Zinc cadmium sulfide and Lanthanum oxysulfide are also phosphor materials but are not as commonly used in medical imaging as CsI and GOS.