RFlash: Shadow Reduction in Ultrasound Imaging Using Differentiable Simulation and Radiance Field DecompositionNew

This arXiv paper presents RFlash, a method that combines differentiable acoustic simulation with radiance field decomposition to address shadow artifacts in ultrasound imaging caused by bone and highly attenuating tissues. In fetal brain imaging applications, skull-induced artifacts disproportionately degrade the proximal hemisphere, limiting symmetric assessment. The approach avoids restrictive assumptions on tissue properties and generative model hallucinations by leveraging physics-based simulation. The method demonstrates improved visualization of clinically important structures obscured by acoustic shadows.