Total Risk in CT Imaging: Why Clinical Risk Outweighs Radiation Risk with Dr. Francesco Ria

Episode notes

Radiation risk has long shaped how clinicians and patients think about CT imaging. But according to Dr. Francesco Ria, focusing on radiation alone misses the bigger picture. In this episode of Rethink Imaging, Dr. Ria introduces the concept of “total risk” — a framework that considers not only radiation exposure, but also the clinical consequences of missed or delayed diagnoses, unnecessary repeat scans, suboptimal image quality, and inappropriate utilization. When CT exams are avoided out of disproportionate fear of radiation, patients may face far greater harm from undiagnosed disease. Dr. Ria explains how advancements in CT technology, protocol optimization, and evidence-based imaging guidelines have significantly reduced radiation dose over time. Yet public perception and even some clinical decision-making still reflect outdated assumptions about risk. He argues that imaging professionals must communicate risk more clearly and contextualize radiation within the broader clinical picture.