”Interventional” refers to interventional radiology, which consists of two major components: diagnosis and treatment. It is the application of “non-surgical” methods to diagnose and treat diseases under the monitoring and guidance of X-ray, CT, MRI, B-ultrasound and other imaging equipment. “Interventional” is the third major treatment technology based on high technology and characterized by minimally invasive treatment, alongside with medical and surgical. Interventional therapy is the main content of Interventional Radiology, an emerging discipline that has been developed in recent years. Simply put, interventional therapy is a minimally invasive treatment by using modern high-tech means. In terms of its method and means, it is different from “medicine and injection” in internal medicine and “surgery and incision” in surgery, but under the guidance of imaging equipment, it treats lesions in the body through the extracorporeal operation of various catheters (about 2 mm thick) placed in the body and unique treatment methods. Therefore, it has the characteristics of “no incision, little damage, quick recovery and good effect”. Moreover, it is especially suitable for patients who cannot be treated with medical drugs (such as liver cancer and lung cancer) and cannot, should not or do not want to be treated with surgical procedures. At present, interventional therapy has become one of the main means of clinical treatment in modern hospitals and will certainly become the direction of medical development in the 21st century. At present, the diseases that can be treated by interventional therapy mainly include the following categories: a. Vascular diseases (atherosclerosis, diabetes, arteritis, arteriovenous thrombosis, vascular dysplasia, vascular malformation, arteriovenous fistula, aneurysm, etc.); b. Hypertension and renal insufficiency caused by renal artery stenosis; c. Stenosis of the subclavian artery, carotid artery, vertebral artery or intracranial artery; d. Stenosis of the cerebral blood supply caused by arterial stenosis. 4.Aneurysm, arteriovenous malformation, arteriovenous fistula in all parts of the body; arterial thrombosis in all parts of the body; 5.Limb swelling caused by blockage of large veins in the lower extremities (deep vein thrombosis in the lower extremities); 6.Acute pulmonary artery embolism causing respiratory distress and even respiratory failure; 7.Venous stenosis or occlusion such as upper and lower vena cava stenosis or Bu-plus syndrome causing edema in the head and extremities and/or Large hepatic ascites, etc. Malignant tumors liver cancer, lung cancer, pancreatic cancer, esophageal cancer, kidney cancer, colon cancer, gastric cancer, gynecological tumors, cervicothoracic and lumbar vertebral metastases and myeloma, etc. Benign tumors Uterine fibroids (adenomyosis), hepatic hemangioma, adrenal tumors. Various luminal stenosis 1. Tumor or other causes of tracheal stenosis, breathing difficulties; 2. Tumor or other causes of esophageal, intestinal and gastric stenosis, resulting in swallowing difficulties and vomiting; 3. Various causes of biliary stenosis, obstructive jaundice, etc.; 5. Cirrhosis Liver cirrhosis, gastrointestinal bleeding caused by portal hypertension, massive ascites and hypersplenism, etc. VI. Various bleeding Hemoptysis caused by bronchial dilatation, tuberculosis or tumor, gastrointestinal bleeding, rhinorrhea, pelvic bleeding, ruptured liver, spleen and kidney bleeding, etc. Other lesions: 1. vertebral osteoporosis, vertebral hemangioma; 2. intervertebral disc herniation, aseptic necrosis of femoral head; 3. tubal infertility; 4. liver, kidney, thyroid and ovarian cysts, etc. Eight, radiofrequency ablation treatment of liver, lung and other tumors and lesions. The common characteristic, or advantage, of various interventional treatments is that they can integrate qualitative and localized diagnosis and effective treatment of lesions into one, achieving once and for all, with significant and objective treatment effects and the widest indications in the same lesion. Therefore, it is increasingly being used and has formed an independent clinical discipline.