Final answer:
The spatial resolution of cassette-based digital radiography is affected by the diameter of the laser beam, the divergence of the photostimulable luminescence, and the recording frequency, with all contributing to the fineness or coarseness of the captured image.
Step-by-step explanation:
The factors that affect the spatial resolution of cassette-based digital radiography include the diameter of the laser beam, divergence of the photostimulable luminescence, and recording frequency. A smaller laser beam diameter leads to higher resolution, as it can define finer points in the image. Divergence of the photostimulable luminescence can blur the image, affecting resolution, and a higher recording frequency can allow for a more finely sampled image, which also improves resolution. Therefore, all three factors, the diameter of the laser beam, the divergence of the photostimulable luminescence, and the recording frequency influence the spatial resolution of cassette-based digital radiography systems.