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

Improved Scatter Correction in X-Ray Cone Beam CT with Moving Beam Stop Array Using Johns' Equation