Deep 3D reconstruction of synchrotron X-ray computed tomography for intact lungs

Synchrotron X-rays can be used to obtain highly detailed images of parts of the lung. However, micro-motion artifacts induced by such as cardiac motion impede quantitative visualization of the alveoli in the lungs. This paper proposes a method that applies a neural network for synchrotron X-ray Computed Tomography (CT) data to reconstruct the high-quality 3D structure of alveoli in intact mouse lungs at expiration, without needing ground-truth data. Our approach reconstructs the spatial sequence of CT images by using a deep-image prior with interpolated input latent variables, and in this way significantly enhances the images of alveolar structure compared with the prior art. The approach successfully visualizes 3D alveolar units of intact mouse lungs at expiration and enables us to measure the diameter of the alveoli. We believe that our approach helps to accurately visualize other living organs hampered by micro-motion.

Automated summary

This paper proposes a method that uses a neural network to reconstruct the high-quality 3D structure of alveoli in intact mouse lungs using synchrotron X-ray Computed Tomography (CT) data. The method enhances the images of alveolar structure compared with previous techniques by reconstructing the spatial sequence of CT images using a deep-image prior with interpolated input latent variables. The approach successfully visualizes 3D alveolar units and enables the measurement of alveoli diameter. It can be applied to accurately visualize other living organs hampered by micro-motion.