Title :
Improving image quality in dual energy CT by edge-enhancing diffusion denoising
Author :
Petropoulos, Andreas E. ; Vlachopoulos, George F. ; Skiadopoulos, Spyros G. ; Karahaliou, Anna N. ; Costaridou, Lena I.
Author_Institution :
Med. Phys. Dept., Univ. of Patras, Patras, Greece
Abstract :
The aim of this study is to investigate the effect of edge-enhancing diffusion (EED) denoising on the quality of dual energy CT images, derived by varying the weighting of the two spectra (0.1 to 0.9, 0.1 step). The quality of EED denoised weighted images was quantitatively assessed by means of SNR, contrast and CNR measured on ROIs of phantom images corresponding to 14 mg/ml iodine concentration and bone equivalent. The performance of the EED denoising technique was further compared to the performance of median filtering. EED improves significantly the quality of weighted images.
Keywords :
computerised tomography; image denoising; median filters; medical image processing; CNR; EED denoising; SNR; bone equivalent; computerised tomography; contrast; contrast-to-noise ratio; dual energy CT; edge-enhancing diffusion denoising; image ROI; image quality; iodine concentration; median filtering; regions-of-interest; signal-to-noise ratio; Bones; Computed tomography; Filtering; Image edge detection; Materials; Noise reduction; Signal to noise ratio;
Conference_Titel :
Bioinformatics and Bioengineering (BIBE), 2013 IEEE 13th International Conference on
Conference_Location :
Chania
DOI :
10.1109/BIBE.2013.6701597
