Low-Dose and Scatter-Free Cone-Beam CT Imaging Using a Stationary Beam Blocker in a Single Scan: Phantom Studies

Figure 3

Axial views of the reconstructed Catphan 600 phantom. (a) CBCT without scatter correction using FDK algorithm and 655 projections; (b) low-dose cone-beam CT without scatter correction using  ABOCS and 163 projections (estimated 75% dose reduction); (c) CBCT using the proposed scatter correction and ABOCS reconstruction using 218 projections (estimated 75% dose reduction); (d) fan-beam CT as the ground truth using FDK reconstruction and 655 projections. The selected uniform ROIs are marked with red circles in (d). Display windows: [−400  600] HU.

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