Abstract
The continuous development and wide application of CT in medical practice have raised public concern over the associated radiation dose to the patient. However, reducing the radiation dose may result in increasing the noise and artifacts, which may adversely interfere with the judgment and belief of radiologists. Therefore, we propose a low-dose CT denoising model based on multiscale parallel convolution neural network to improve the visual effect. Residual learning is utilized to reduce the difficulty of network learning, and batch normalization is adopted to solve the problem of performance degradation due to the increase in neural network layers. Specifically, we introduce the dilated convolution to expand the receptive field by inserting weights of zero in the standard convolution kernel, while not increasing the extra parameters. Furthermore, the multiscale parallel method is utilized to extract multiscale detail features from lung images. Compared to the traditional methods such as Wiener filter, NLM, and models based on CNN, e.g., SCNN, DnCNN, our extensive experimental results demonstrate that our proposed model (CT-ReCNN) can not only reduce the LDCT lung images noise level, but also retain more exact information as well.
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21 December 2020
A Correction to this paper has been published: https://doi.org/10.1007/s00371-020-02039-5
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Acknowledgements
This research was supported by Zhejiang Provincial Natural Science Foundation of China under Grant No. LY17F010015.
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The original online version of this article was revised: The photos of Xiaoben Jiang and Yu Yao were swapped.
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Jiang, X., Jin, Y. & Yao, Y. Low-dose CT lung images denoising based on multiscale parallel convolution neural network. Vis Comput 37, 2419–2431 (2021). https://doi.org/10.1007/s00371-020-01996-1
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DOI: https://doi.org/10.1007/s00371-020-01996-1