Organized by the Chengdu High-tech Zone Medical Association, the Online Seminar on Challenging Medical Imaging Cases and Physician Skill Training was successfully held on March 28 and April 27, 2025. The conference focused on difficulties in imaging diagnosis, with in-depth discussions on topics such as the application of high-concentration contrast agents, optimization of low-dose protocols, and various CTA scanning techniques, combined with the exchange of practical case studies. The content was closely aligned with clinical practice and highly practical, effectively enhancing participants' ability to interpret challenging imaging cases and broadening their diagnostic approach. The seminar provided significant guidance for improving clinical diagnosis and treatment standards.