6 Cassettes | 合法醫療器材資訊網

Figure6.6MainpartsofatypicalX-raycassette.79.(iv)providesarelativelyradiolucentwindow(thecassettefront)forX-radiationtoreachthefilm-​intensifying.

A film cassette is a container for exposed or unexposed film. The size and shape of the cassette depends on the film it contains, which can be a single sheet of film of any of the manufactured sizes, a number of sheet films of similar size when unexposed, a number of similar or different size sheet films when exposed, or a roll of film. An exception to this is the xerographic cassette which contains not film, but a selenium-coated aluminium plate. Here the image is formed as a charge pattern on the selenium and only transferred to a paper image during the processing stage; this is discussed more fully in Chapter 15.

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