Frequency-Supervised MR-to-CT Image Synthesis
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Abstract (arXiv)
This paper strives to generate a synthetic computed tomography (CT) image from a magnetic resonance (MR) image. The synthetic CT image is valuable for radiotherapy planning when only an MR image is available. Recent approaches have made large strides in solving this challenging synthesis problem with convolutional neural networks that learn a mapping from MR inputs to CT outputs. In this paper, we find that all existing approaches share a common limitation: reconstruction breaks down in and around the high-frequency parts of CT images. To address this common limitation, we introduce frequency-supervised deep networks to explicitly enhance high-frequency MR-to-CT image reconstruction. We propose a frequency decomposition layer that learns to decompose predicted CT outputs into low- and high-frequency components, and we introduce a refinement module to improve high-frequency reconstruction through high-frequency adversarial learning. Experimental results on a new dataset with 45 pairs of 3D MR-CT brain images show the effectiveness and potential of the proposed approach. Code is available at urlhttps://github.com/shizenglin/Frequency-Supervised-MR-to-CT-Image-Synthesis.
Key facts. Cited by 3 papers in the map (data through 7 Oct 2026). Builds on 11 of its 32 references that are in the map. First posted on arXiv 19 Jul 2021.
Builds on
11 of 32 references.
References · 11
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- 2019Improved MR to CT synthesis for PET/MR attenuation correction using Imitation Learningcited by 3
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Citing papers per year: 2023: 1; 2024: 1; 2025: 1.
3 papers.