Self-Supervised 2D/3D Registration for X-Ray to CT Image Fusion

• URL: http://arxiv.org/abs/2210.07611v1
• Date: Fri, 14 Oct 2022 08:06:57 GMT
• Title: Self-Supervised 2D/3D Registration for X-Ray to CT Image Fusion
• Authors: Srikrishna Jaganathan, Maximilian Kukla, Jian Wang, Karthik Shetty, Andreas Maier
• Abstract summary: We propose a self-supervised 2D/3D registration framework combining simulated training with unsupervised feature and pixel space domain adaptation. Our framework achieves a registration accuracy of 1.83$pm$1.16 mm with a high success ratio of 90.1% on real X-ray images.
• Score: 10.040271638205382
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Deep Learning-based 2D/3D registration enables fast, robust, and accurate X-ray to CT image fusion when large annotated paired datasets are available for training. However, the need for paired CT volume and X-ray images with ground truth registration limits the applicability in interventional scenarios. An alternative is to use simulated X-ray projections from CT volumes, thus removing the need for paired annotated datasets. Deep Neural Networks trained exclusively on simulated X-ray projections can perform significantly worse on real X-ray images due to the domain gap. We propose a self-supervised 2D/3D registration framework combining simulated training with unsupervised feature and pixel space domain adaptation to overcome the domain gap and eliminate the need for paired annotated datasets. Our framework achieves a registration accuracy of 1.83$\pm$1.16 mm with a high success ratio of 90.1% on real X-ray images showing a 23.9% increase in success ratio compared to reference annotation-free algorithms.

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