This research examines how physicians' imaging-ordering strategies affect emergency department efficiency. Using electronic health records and an instrumental variable approach based on random physician assignment, the study finds that discretionary batching of imaging tests increases length of stay by 65% and doubles imaging utilization, ultimately reducing patient flow and safety.

This research develops a spatial “GPS” for lung cancer screening by mapping CT scans into a shared coordinate system. By identifying high-risk regions for malignant nodules, it supports radiologists and AI in improving diagnostic accuracy, decision-making, and interpretability, transforming screening from broad search to targeted, data-driven precision.