RISE-MAR: Radiologist-Integrated Self-Evolution for Generalizable Metal Artifact Reduction in CT Imaging
VOLUME 22, 2025
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Abstract
This study introduces RISE-MAR (Radiologist-Integrated Self-Evolution for Metal Artifact Reduction), a novel framework that addresses the persistent challenge of metal artifacts in computed tomography (CT) imaging. Unlike previous approaches that rely solely on mathematical optimization or deep learning, RISE-MAR explicitly integrates radiologist expertise into a self-evolving system through an innovative feedback loop. Our dual-domain architecture combines a transformer-based image branch with a specialized sinogram network, enforcing physical consistency while capturing long-range dependencies essential for complex artifact patterns. The key innovation lies in our confidence-guided pseudo-labeling mechanism that selectively identifies high-confidence regions for self-training, refined by radiologist feedback that ensures clinical relevance. Experimental results demonstrate RISE-MAR's superior performance across synthetic and clinical datasets, with significant improvements in both quantitative metrics (PSNR: 36.2 dB, SSIM: 0.923) and clinical relevance scores (4.2/5) compared to state-of-the-art methods. Most notably, RISE-MAR shows remarkable generalization capability across different implant types and anatomical regions, effectively bridging the domain gap between training environments and clinical applications. Our work establishes a new paradigm for developing medical image enhancement techniques that leverage the complementary strengths of computational methods and clinical expertise.
Lecture in accounting. University of Basrah, College of Administration and Economics, Department of Accounting.