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2017 ; 8
(2
): 679-694
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Low-dose CT via convolutional neural network
#MMPMID28270976
Chen H
; Zhang Y
; Zhang W
; Liao P
; Li K
; Zhou J
; Wang G
Biomed Opt Express
2017[Feb]; 8
(2
): 679-694
PMID28270976
show ga
In order to reduce the potential radiation risk, low-dose CT has attracted an
increasing attention. However, simply lowering the radiation dose will
significantly degrade the image quality. In this paper, we propose a new noise
reduction method for low-dose CT via deep learning without accessing original
projection data. A deep convolutional neural network is here used to map low-dose
CT images towards its corresponding normal-dose counterparts in a patch-by-patch
fashion. Qualitative results demonstrate a great potential of the proposed method
on artifact reduction and structure preservation. In terms of the quantitative
metrics, the proposed method has showed a substantial improvement on PSNR, RMSE
and SSIM than the competing state-of-art methods. Furthermore, the speed of our
method is one order of magnitude faster than the iterative reconstruction and
patch-based image denoising methods.