TF-PRDiT uses a frozen 3D diffusion transformer prior with task-specific forward operators and predictor-corrector sampling to solve X-ray-to-CT reconstruction and other volumetric inverse problems without any retraining.
arXiv preprint arXiv:2310.17167 (2023)
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PRDiT generates voxel-level 3D CT volumes via a local MLP patch denoiser for low-frequency structures and a memory-efficient global residual diffusion transformer for high-frequency details, outperforming HA-GAN, 3D LDM, and WDM-3D on LIDC-IDRI and RAD-ChestCT with lower FID, MMD, and Wasserstein sc
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Pixel-Level Residual Diffusion Transformer: Scalable 3D CT Volume Generation
PRDiT generates voxel-level 3D CT volumes via a local MLP patch denoiser for low-frequency structures and a memory-efficient global residual diffusion transformer for high-frequency details, outperforming HA-GAN, 3D LDM, and WDM-3D on LIDC-IDRI and RAD-ChestCT with lower FID, MMD, and Wasserstein sc