ESTRO 2025 - Abstract Book

S2956

Physics - Image acquisition and processing

ESTRO 2025

Conclusion: In conclusion, we have developed a gate-less joint reconstruction method (CBCT-MOTUS) for model-based motion estimation and correction in CBCT imaging for irregular and periodic motion. High temporal resolution (182ms) is achieved by exploiting the smoothness and compressibility of motion using a low-rank B-spline motion model, enabling the correction for non-rigid irregular and periodic motion.

Keywords: CBCT,non-rigid motion,gate-less motion correction

References: [1] G. D. Hugo, M. Rosu, “Advances in 4D radiation therapy for managing respiration: Part I – 4D”, Zeitschrift für Medizinische Physik; 22: 258-271 (2012) [2] N. R. F. Huttinga, T. Bruijnen, C. A. T. van den Berg, Alessandro Sbrizzi, “Nonrigid 3D motion estimation at high temporal resolution from prospectively undersampled k-space data using low-rank MR-MOTUS", Magnetic Resonance in Medicine; 85: 2309-2326 (2021)