Final answer:
A thin-film transistor (TFT) is not a component of a Computed Radiography (CR) reader; instead, major components include a laser source, an image plate transport mechanism, and an analog-to-digital converter.
Step-by-step explanation:
The major components of a Computed Radiography (CR) reader include a laser source, an image plate transport mechanism, and an analog-to-digital converter. The one component that does not belong to a CR reader is a thin-film transistor (TFT), which is more closely associated with digital radiography detectors like flat-panel x-ray detectors.
Laser sources are used in various equipment, such as CD players, where lasers read the information on the disc, and in medical imaging, like CR, where a laser scans an image plate to read the stored x-ray image. The image plate transport mechanism is responsible for moving the image plate within the CR reader to the appropriate position for scanning by the laser. Once the laser has scanned the image plate, an analog-to-digital converter is used to convert the acquired analog information into digital data that can be processed and viewed.
The term 'thin-film transistor', typically refers to the technology used in flat-panel detectors where a matrix of TFTs detects x-ray signals directly and converts them into digital images. Thus, a TFT is not a component of a conventional CR reader.