Which device can serve as an alternative to a photomultiplier tube (PMT) in computed radiography (CR) systems?

The charge-coupled device (CCD) serves as an effective alternative to a photomultiplier tube (PMT) in computed radiography systems due to its ability to convert light into electronic signals. CCDs are highly sensitive image sensors that capture light from a scintillator, which is a material that emits light when exposed to ionizing radiation. This characteristic makes CCDs an excellent choice for digital imaging applications, including radiography, where precision and image quality are crucial.

In a computed radiography system, the scintillator captures the X-rays, and the emitted light is then detected by the CCD. The CCD then converts this light into an electric charge that can be processed to create a digital image. This process allows for efficient and high-quality imaging, providing a clear and detailed representation of the radiographic data.

Other options like the thin-film transistor (TFT) and the analog-to-digital converter (ADC) have different roles within the imaging system. TFTs are typically part of flat-panel detector technology, which is used in direct digital radiography rather than CR. The ADC is a component that converts analog signals into digital form but does not serve as a primary device for capturing images. Overall, the versatility and efficacy of CCDs in capturing