Figure 6.

Comparison of reconstructions of a cylindrical phantom acquired under the following conditions: (a) collimated beam and an antiscatter grid (low scatter conditions), (b) grid with full FOV collimation, (c) no grid and full FOV collimation (high scatter conditions). (d) Image profiles along central the horizontal row of the reconstructions shown in (a), (b), and (c). (e) Signal-difference-to-noise ratio as a function of dose for imaging with and without the grid. The SDNR is measured using the two ROIs marked with black squares in (a). The use of the grid improves SDNR without increase in dose.