Frequency Schrödinger bridge diffusion model for fast MRI reconstruction in abdominal MR-guided online adaptive radiotherapy.
BACKGROUND Online adaptive radiotherapy (ART) employs modalities like CBCT, CT, and MRI. For abdominal malignancies, MRI stands out with superior soft-tissue contrast, no ionizing radiation, and functional imaging capabilities. Yet, MRI-guided ART for such cases is challenged by long treatment time. Thus, boosting effi...