We provide a fast and accurate scatter artifacts correction algorithm for cone beam CT (CBCT) imaging. The method starts with an estimation of coarse scatter profile for a set of CBCT images. A total-variation denoising algorithm designed specifically for Poisson signal is then applied to derive the final scatter distribution. Qualitatively and quantitatively evaluations using Monte Carlo (MC) simulations, experimental CBCT phantom data, and \emph{in vivo} human data acquired for a clinical image guided radiation therapy were performed. Results show that the proposed algorithm can significantly reduce scatter artifacts and recover the correct HU within either projection domain or image domain. Further test shows the method is robust with respect to segmentation procedure.
@article{arxiv.1501.04409,
title = {Fast Scatter Artifacts Correction for Cone-Beam CT without System Modification and Repeat Scan},
author = {Wei Zhao and Jun Zhu and Luyao Wang},
journal= {arXiv preprint arXiv:1501.04409},
year = {2015}
}
Comments
Submitted to The 13th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine. Comments are welcome