FIG. 2.

Pre-sampled MTF for four incident beam angles (0°, 2.24°, 4.47° and 6.69°) using segmented scintillators with polymer septal walls. The results are shown for 10 – 40 mm thick BGO scintillators in (a), (c), (e) and (g) and CsI:T1 scintillators in (b), (d), (f) and (h). In this figure and in figure 3, for each detector configuration, the progressive degradation in MTF shown by the various lines corresponds to increasing incident beam angle. Note that the simulation results are compared to the measured MTF from the conventional EPID.