In this video, we explore the TU-4KC91 4K ICG fluorescence endoscopic camera system in a detailed walkthrough. You'll see how the dual 2CMOS sensors deliver ultra-clear 4K imaging at 60fps, understand the three light source modes (white light, ICG fluorescence, and dual-light), and learn about the integrated 7-inch touch screen interface for simplified surgical workflow. We demonstrate the system's connectivity options for recording and display, and discuss its clinical applications in laparoscopic minimally invasive surgery for tumor perfusion observation.