Deep learning for tomographic reconstruction with limited data

Hendriksen, A.A.

Tomography is a powerful technique to non-destructively determine the interior structure of an object.
Usually, a series of projection images (e.g.\ X-ray images) is acquired from a range of different positions.
from these projection images, a reconstruction of the object's interior is computed. Many advanced applications require fast acquisition, effectively limiting the number of projection images and imposing a level of noise on these images. These limitations result in artifacts (deficiencies) in the reconstructed images. Recently, deep neural networks have emerged as a powerful technique to remove these limited-data artifacts from reconstructed images, often outperforming
conventional state-of-the-art techniques. To perform this task, the networks are typically trained on a dataset of paired low-quality and high-quality images of similar objects. This is a major obstacle to their use in many practical applications. In this thesis, we explore techniques to employ...Show moreTomography is a powerful technique to non-destructively determine the interior structure of an object.
Usually, a series of projection images (e.g.\ X-ray images) is acquired from a range of different positions.
from these projection images, a reconstruction of the object's interior is computed. Many advanced applications require fast acquisition, effectively limiting the number of projection images and imposing a level of noise on these images. These limitations result in artifacts (deficiencies) in the reconstructed images. Recently, deep neural networks have emerged as a powerful technique to remove these limited-data artifacts from reconstructed images, often outperforming
conventional state-of-the-art techniques. To perform this task, the networks are typically trained on a dataset of paired low-quality and high-quality images of similar objects. This is a major obstacle to their use in many practical applications. In this thesis, we explore techniques to employ deep learning in advanced experiments where measuring additional objects is not possible.
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Deep learning for tomographic reconstruction with limited data

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