Not someone, but something: Rethinking trust in the age of medical AI

As artificial intelligence (AI) becomes embedded in healthcare, trust in medical decision - making is changing fast. Nowhere is this shift more visible than in radiology, where AI tools are increasingly embedded across the imaging workflow -- from scheduling an d acquisition to interpretation, reporting, and communication with referrers and patients. This opinion paper argues that trust in AI isn't a simple transfer from humans to machines -- it's a dynamic, evolving relationship that must be built and maintained. R ather than debating whether AI belongs in medicine, it asks: what kind of trust must AI earn, and how? Drawing from philosophy, bioethics, and system design, it explores the key differences between human trust and machine reliability -- emphasizing transparen cy, accountability, and alignment with the values of good care. It argues that trust in AI shouldn't be built on mimicking empathy or intuition, but on thoughtful design, responsible deployment, and clear moral responsibility. The goal is a balanced view -- o ne that avoids blind optimism and reflexive fear. Trust in AI must be treated not as a given, but as something to be earned over time.