When processing, what is used to scan the phosphor in a CR plate?

The correct choice involves the use of a laser beam to scan the phosphor in a Computed Radiography (CR) plate. In this process, the CR plate contains photostimulable phosphor materials that store the energy from the X-ray exposure. Once the plate is ready for processing, a laser beam scans the plate.

As the laser strikes the phosphor, it stimulates the stored energy, causing the phosphor to emit light, typically in the visible spectrum. This emitted light is then captured by a photodetector and converted into an electrical signal that can be processed into an image. The efficiency and precision of the laser beam in stimulating the phosphor are paramount for obtaining high-quality images in radiographic practices.

This method stands out as it allows for the digital conversion of traditional film-based imaging while maintaining high resolution and contrast.