Clipping-induced bias correction for low-dose CT imaging

Kevin M. Brown

doi:10.1117/12.2531708

28 May 2019 Clipping-induced bias correction for low-dose CT imaging

Kevin M. Brown

Proceedings Volume 11072, 15th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine; 110721O (2019) https://doi.org/10.1117/12.2531708
Event: Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, 2019, Philadelphia, United States

Abstract

Ultra-low dose CT scanning produces non-ideal data with many problems when the number of photons reaching the detector is very small. One such problem is the bias introduced by clipping of negative measurement values prior to the log operation. This paper proposes a correction method for this clipping-induced bias, in particular for the case when access to the original un-clipped measurements is no longer available.

Citation Download Citation

Kevin M. Brown "Clipping-induced bias correction for low-dose CT imaging", Proc. SPIE 11072, 15th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, 110721O (28 May 2019); https://doi.org/10.1117/12.2531708

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