P1.50 - Enhancing Full Waveform Inversion for Ultrasound Imaging with Langevin Stein Variational Gradient Descent: Improved Accuracy and Uncertainty Quantification
- Event
- 2025 ICU PADERBORN - 9th International Congress on Ultrasonics
2025-09-21 - 2025-09-25
Paderborn - Band
- Posters
- Chapter
- Posters
- Author(s)
- Q. Li, C. Liu, D. Ta - Fudan University, Shanghai (China)
- Pages
- 375 - 378
- DOI
- 10.5162/Ultrasonic2025/P1.50
- ISBN
- 978-3-910600-08-9
- Price
- free
Abstract
This study applies Langevin Stein Variational Gradient Descent (LSVGD) to Full Waveform Inversion (FWI) for medical ultrasound imaging. LSVGD enables joint reconstruction of speed of sound (SOS) and spatial uncertainty. Posterior accuracy is validated using a Gaussian mixture model. Applied to a 2D breast phantom, LSVGD achieves reconstruction quality on par with standard FWI, while highlighting uncertainty in heterogeneous regions. Results underscore LSVGD’s utility for uncertainty-aware, high-resolution ultrasound imaging.