Figure 1.

Phosphor simulation details. (a) The light-yield or scintillation spectrum for the simulated phosphor, with parameters as given in Table 1 ▸. Although the mean number of light photons emitted per 12 keV X-ray is 281.5 photons, the distribution is rather broad, so events with much higher or lower amplification gains are common. (b) The point-spread data were determined by simulating a pencil beam of X-rays incident on the phosphor and binning output counts into a pixel grid with a 10 µm pitch positioned immediately behind the phosphor screen. A surface was then fitted over the counts. Note that this graph represents the point spread of the phosphor alone.