Background noise removal is an easy way to diminish the impact of imperfect signals in the projection blank regions in optical CT imaging of gel dosimeters. The influence of this approach to reconstruction accuracy and noise behaviour is assessed by computational simulations using synthetic phantoms. The results show that an offset is induced in the reconstructed phantom region by background noise removal, but the amplitude of the offset is negligible. Also, no apparent noise or artefact patterns are noticeable. We can conclude that the background noise removal method doesn't impact the reconstruction accuracy of filtered backprojection reconstruction algorithm for optical CT imaging.
[1]Tsinghua Univ, Inst Nucl & New Energy Technol, Beijing 100084, Peoples R China;
[2]Macquarie Univ, Dept Engn, Biomed Engn Lab, Sydney, NSW 2109, Australia;
[3]Fudan Univ, Dept Radiat Oncol, Shanghai Canc Ctr, Shanghai 200032, Peoples R China
(8.0+极速模式)