Lingyi Xu shares how AI is being developed to help doctors detect lung cancer and brain diseases earlier, especially in under-resourced communities. Drawing from her own journey from business student to health-focused researcher, she explains how AI tools can act as co-pilots for physicians, turning scattered data into life-saving insight. Her talk shows how technology, when thoughtfully built, becomes a tool for equity and care in the places that need it most. Lingyi Xu is a PhD student in Computing & Data Sciences at Boston University, where she uses artificial intelligence to tackle real-world healthcare challenges, like catching lung cancer early and helping researchers understand brain diseases better. She started out in finance coding stock models, but during the COVID- 19 pandemic, she saw firsthand how delayed diagnoses affected real people. That experience, combined with a growing interest in AI and health, led her to change direction. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx