Which of the following is the outermost component of a computed radiography (CR) cassette?

The outermost component of a computed radiography (CR) cassette is typically the compression plate. This plate serves to hold the imaging plate in place and can also provide a uniform pressure across the area being imaged, which enhances the quality of the image by minimizing motion and ensuring that the imaging phosphor is properly aligned with the X-ray beam.

In the context of a CR cassette, the other components play essential roles but are not the outermost layer. The photostimulable phosphor is the layer that captures the X-ray data, while the lead foil helps absorb backscatter radiation, preventing it from compromising image quality. Carbon fibers, though used in some cassettes for their lightweight and durable properties, are not typically part of the outer layer that makes contact with the X-ray beam.

The compression plate is crucial for overall functionality, ensuring that the imaging process is accurate and reliable, which makes it the right answer in this question regarding the outermost component of a CR cassette.