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At Stability AI, I contributed to HDiT (invented by my colleague @RiversHaveWings) as a side project to explore some diffusion research outside of the medical AI work I was doing. What's interesting to see is how this project has also been used in medical AI research as well! In this paper, the authors use HDiT directly applied to the wavelet domain to train a diffusion model to generate 3D brain MRI scans.
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