Multi-modality super-resolution loss for GAN-based super-resolution of clinical CT images using micro CT image database

• URL: http://arxiv.org/abs/1912.12838v2
• Date: Tue, 7 Apr 2020 11:06:05 GMT
• Title: Multi-modality super-resolution loss for GAN-based super-resolution of clinical CT images using micro CT image database
• Authors: Tong Zheng, Hirohisa Oda, Takayasu Moriya, Shota Nakamura, Masahiro Oda, Masaki Mori, Horitsugu Takabatake, Hiroshi Natori and Kensaku Mori
• Abstract summary: This paper introduces multi-modality loss function for GAN-based super-resolution. It can maintain image structure and intensity on unpaired training dataset of clinical CT and micro CT volumes.
• Score: 1.5247645805472543
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: This paper newly introduces multi-modality loss function for GAN-based super-resolution that can maintain image structure and intensity on unpaired training dataset of clinical CT and micro CT volumes. Precise non-invasive diagnosis of lung cancer mainly utilizes 3D multidetector computed-tomography (CT) data. On the other hand, we can take micro CT images of resected lung specimen in 50 micro meter or higher resolution. However, micro CT scanning cannot be applied to living human imaging. For obtaining highly detailed information such as cancer invasion area from pre-operative clinical CT volumes of lung cancer patients, super-resolution (SR) of clinical CT volumes to $\mu$CT level might be one of substitutive solutions. While most SR methods require paired low- and high-resolution images for training, it is infeasible to obtain precisely paired clinical CT and micro CT volumes. We aim to propose unpaired SR approaches for clincial CT using micro CT images based on unpaired image translation methods such as CycleGAN or UNIT. Since clinical CT and micro CT are very different in structure and intensity, direct application of GAN-based unpaired image translation methods in super-resolution tends to generate arbitrary images. Aiming to solve this problem, we propose new loss function called multi-modality loss function to maintain the similarity of input images and corresponding output images in super-resolution task. Experimental results demonstrated that the newly proposed loss function made CycleGAN and UNIT to successfully perform SR of clinical CT images of lung cancer patients into micro CT level resolution, while original CycleGAN and UNIT failed in super-resolution.

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