Radio-wave knife and gamma knife differ in terms of rays, indications, and tumor localization. 1. Rays: The radio-wave knife uses about 200 rays selected by the computer among thousands of rays, and the diameter of the rays can be selected from 5 to 60mm. Gamma Knife uses a fixed number of 201 rays, with four choices of ray diameters: 4mm, 8mm, 14mm, and 18mm. 2. Indications: The radio wave knife can be used for tumors of the whole body, and can treat tumors up to 15cm. Gamma Knife is mainly used for treating head tumors <3cm and requires head frame fixation before treatment. 3. Tumor localization: Gamma Knife needs to be localized in advance before treatment, while Radio Wave Knife can frequently use X-ray to localize and correct the irradiation direction during the treatment process, and even correct the movement of irradiation target area caused by respiration. Overall speaking, RK is more advanced than Gamma Knife, but the cost of RK is higher, and the technology of RK is less in China, so it is recommended that patients choose the appropriate treatment according to their conditions and personal wishes.