  In this paper, an improved scatter correction with moving beam stop array
(BSA) for x-ray cone beam (CB) CT is proposed. Firstly, correlation between
neighboring CB views is deduced based on John's Equation. Then,
correlation-based algorithm is presented to complement the incomplete views by
using the redundancy (over-determined information) in CB projections. Finally,
combining the algorithm with scatter correction method using moving BSA, where
part of primary radiation is blocked and incomplete projections are acquired,
an improved correction method is proposed. Effectiveness and robustness is
validated by Monte Carlo (MC) simulation with EGSnrc on humanoid phantom.
