[논문]Development of de-noised image reconstruction technique using Convolutional AutoEncoder for fast monitoring of fuel assemblies

Choi, Se Hwan; Choi, Hyun Joon; Min, Chul Hee; Chung, Young Hyun; Ahn, Jae Joon

doi:10.1016/j.net.2020.08.020

Development of de-noised image reconstruction technique using Convolutional AutoEncoder for fast monitoring of fuel assemblies 원문보기

Nuclear engineering and technology : an international journal of the Korean Nuclear Society, v.53 no.3, 2021년, pp.888 - 893

Choi, Se Hwan (Department of Information and Statistics, Yonsei University) , Choi, Hyun Joon (Department of Radiation Convergence Engineering, Yonsei University) , Min, Chul Hee (Department of Radiation Convergence Engineering, Yonsei University) , Chung, Young Hyun (Department of Radiation Convergence Engineering, Yonsei University) , Ahn, Jae Joon (Department of Information and Statistics, Yonsei University)

Abstract ▼ AI-Helper

The International Atomic Energy Agency has developed a tomographic imaging system for accomplishing the total fuel rod-by-rod verification time of fuel assemblies within the order of 1-2 h, however, there are still limitations for some fuel types. The aim of this study is to develop a deep learning-based denoising process resulting in increasing the tomographic image acquisition speed of fuel assembly compared to the conventional techniques. Convolutional AutoEncoder (CAE) was employed for denoising the low-quality images reconstructed by filtered back-projection (FBP) algorithm. The image data set was constructed by the Monte Carlo method with the FBP and ground truth (GT) images for 511 patterns of missing fuel rods. The de-noising performance of the CAE model was evaluated by comparing the pixel-by-pixel subtracted images between the GT and FBP images and the GT and CAE images; the average differences of the pixel values for the sample image 1, 2, and 3 were 7.7%, 28.0% and 44.7% for the FBP images, and 0.5%, 1.4% and 1.9% for the predicted image, respectively. Even for the FBP images not discriminable the source patterns, the CAE model could successfully estimate the patterns similarly with the GT image.

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Development of de-noised image reconstruction technique using Convolutional AutoEncoder for fast monitoring of fuel assemblies 원문보기

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Development of de-noised image reconstruction technique using Convolutional AutoEncoder for fast monitoring of fuel assemblies 원문보기

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