One of the most critical factors affecting liver cancer surgery's success is not leaving a tumor behind after surgery and preserving the maximum normal liver tissue. Despite the imaging methods we have, there is a 3 to 15 percent chance of seeing additional tumors during surgery. This is where ultrasonography comes into play. During the surgery, we place specially developed ultrasound probes directly on the surface of the liver, and we detect and remove the hidden cancer tissues that cannot be seen by tomography or MRI. In this way, we minimize the possibility of leaving a tumor behind and the risk of cancer recurrence and prevent liver failure by preserving more liver tissue. The liver is a non-transparent organ. Intraoperative ultrasonography functions like the surgeon’s eye in surgery, making it possible to end the surgery more healthily.