If a liver tumor is found and the opportunity for surgery is lost, radiofrequency knife treatment may be considered. “The radiofrequency knife is not a tangible knife, but its focused irradiation produces scalpel-like results. It combines computerized stereotactic guidance, real-time tumor tracking technology, and linear gas pedal radiation therapy to select the best beam incidence from more than 1,500 angles to treat all aspects of the tumor, and to treat multiple tumors simultaneously. The number of radiation treatments can be determined by the physician according to the patient’s physical condition and the size of the tumor. Usually only 1-5 radiation treatments are needed to kill the tumor tissue. During the treatment process, the computer will automatically compare the position of the tumor, track the tumor in real time, and project the radiation onto the tumor precisely with an error of no more than 0.5 mm, thus ensuring that the normal tissue cells and vital organs around the tumor are not damaged by radiation and effectively reducing the occurrence of radiation complications.