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

The outermost component of a computed radiography (CR) cassette is indeed made from carbon fibers. This material is chosen for its lightweight yet sturdy properties, which help protect the internal components of the cassette while ensuring longevity and durability during handling. The carbon fiber casing also contributes to the overall design of the cassette, allowing for effective portability and ease of use in various medical imaging environments.

In a CR system, the interior contains the photostimulable phosphor (PSP) layer, which is responsible for capturing the radiographic image when exposed to X-rays. While the PSP is crucial for image formation, it resides beneath the outer layer, further emphasizing that the carbon fibers serve as the first line of defense against environmental factors and physical damage.

Rare-earth metals and amorphous selenium are materials that have specific applications in other types of imaging systems, such as digital radiography or other imaging technologies, but they do not constitute the outer layer of a CR cassette. Understanding the structure of the CR cassette and the role of each component underscores the importance of material selection for optimal performance and protection in radiologic applications.