Diffusion Model Enables High-Fidelity 3D Radial UTE MRI Reconstruction at 50× Undersampling

A memory-efficient diffusion model reconstructs 3D ultrashort echo time (UTE) MRI from just 4000 spokes (50× undersampling), outperforming compressed sensing and iterative methods, with generalization to knee, ankle, and shoulder.

• Framework uses a volumetric score-based diffusion model with efficient NUFFT and a conjugate gradient data consistency step.
• Generalizable to out-of-distribution shoulder anatomy without retraining.

Automated summary

RadPigeon summaries are original and for information only. They are not clinical advice.