The department has HGCF-3000 type cold electrode radio frequency tumor treatment machine, which is guided by imaging technology (ultrasound or CT, MR), placing electrodes directly into tumor tissue cells and causing high temperature and dehydration of tumor local tissues through radio frequency (RF) energy, so as to achieve the effect of coagulation and inactivation of tumor treatment. Cold pole RF tumor treatment machine uses controlled cold electrode for percutaneous puncture, which is a simple and efficient minimally invasive interventional procedure. When applying RF ablation treatment, high frequency alternating current from the tip of the electrode is shot into the tissue around the electrode, and the ions in the tissue then change with the direction of the current, thus generating heat by friction, and when the temperature of the tissue exceeds 60℃, the cells die and regional tissue necrosis occurs around the electrode. The standard radiofrequency treatment technique can make the local tissue temperature exceed 100℃, causing coagulative necrosis of tumor tissue and surrounding parenchymal tissue, while the vascular tissue around the tumor coagulates to form a reaction zone, so that it cannot continue to supply blood to the tumor and prevent tumor metastasis. Currently, radiofrequency ablation is applied to treat solid organ tumors such as liver cancer, lung cancer, kidney cancer, prostate hypertrophy, breast cancer, adrenal cancer and pelvic tumors. Radiofrequency treatment technology is an emerging minimally invasive interventional technology, which is effective for malignant tumors that cannot be removed by surgery, safe, minimally invasive, easy to operate and with low postoperative complication rate. The currently applied radiofrequency puncture needle increases the volume of destruction, so that tumors less than 3cm can be successfully destroyed at one time, and larger tumors can be treated by multiple destruction. Interventional minimally invasive radiofrequency treatment technology has a wide range of application for solid tumors, with significant clinical effects and good application prospects.