A new x-ray scatter correction method based on BAG for cone beam CT

Cupping artifacts caused by x-ray scattering can seriously impact the quality of reconstructed images in cone-beam computed tomography (CBCT). The methods that can reduce and control the x-ray scatter is desired urgently. We propose a new scatter correction method based on the beam attenuation grid (BAG) technique. The new method which combines image sequence processing and Guassian Blurring is designed on a flat panel detector. The results of scatter correction indicate that the proposed method is practical and effective in reducing the cupping artifacts caused by scattered photons and slightly improve the contrast of a CBCT image.