What is 3D Conformal Intensity Modulated Radiotherapy? “It is one of the most advanced devices in the field of radiotherapy. It means that the shape of the radiation field and the radiation dose are consistent with the actual shape of the target area (tumor) in three-dimensional spatial direction. Conformal intensity modulation maximizes the irradiation dose to the tumor and minimizes the irradiation volume and dose to the surrounding normal tissues and organs. Indications for intensity-modulated radiotherapy: 1.Nervous system tumors: including glioma, intracranial lymphoma, meningioma, germ cell tumor, medulloblastoma, chordoma, brain metastasis, pineal cell tumor, pituitary tumor, ventricular meningioma, brain stem tumor and spinal cord tumor, etc. 2.Head and neck tumors: including nasopharyngeal cancer, laryngeal cancer, oral cavity cancer, middle ear cancer and maxillary sinus cancer, etc. 3.Thoracic tumors: esophageal cancer, including lung cancer, mediastinal tumors, breast cancer, etc. 4.Abdominal tumors: including pancreatic cancer, biliary tract cancer, liver cancer and intestinal cancer, etc. The difference between conformal radiotherapy and intensity modulation: 1. Conformal radiotherapy plan design and dose calculation are positive, and the tumor target area is evenly and ideally irradiated compared with conventional radiotherapy, but the uniformity is still poor compared with intensity modulation. Intensity modulation can make the tumor more ideally irradiated; 2. Intensity modulation is a reverse dose calculation and design plan, which can better protect the surrounding important normal organs and tissues, better reduce the radiation effect and improve the patient’s quality of life; 3. Intensity modulation is more accurate than conformal; 4. Intensity modulation can further improve the efficacy and reduce the side effects of radiotherapy. The advantages of 3D conformal intensity modulated radiotherapy 1.The range of indications for radiotherapy is wide, and reflex therapy can be considered for tumor patients who cannot tolerate surgery or chemotherapy and whose general condition is still good. 2.Effective, no anesthesia, no incision, less pain, no infection, and less pay effect. 3. As non-invasive treatment, radiotherapy can generally preserve the physiological functions of patients’ organs. 4.Precise positioning: precise treatment; precise positioning; treatment guarantee. 5.Urological and reproductive system tumors: pelvic tumors, kidney cancer and including prostate cancer, etc. 6. Bone tumors : including osteosarcoma,, chondrosarcoma, fibrosarcoma, etc. With the improvement of medical technology, in order to adapt to the continuous development of radiation therapy, the radiotherapy department of the First Hospital of Fujian Medical University has imported Varian linear gas pedals and Siemens high-energy linear gas pedals, automatic multi-leaf grating, amorphous silicon timely verification system, three-dimensional conformal intensity-controlled treatment planning system, network management system, analog positioning machine, mold making system, metering instrument and other high-tech radiotherapy equipment, which can carry out general It can carry out general radiotherapy and 3D conformal intensity modulated radiotherapy. It is one of the few hospitals in South China that can carry out precise intensity modulated radiotherapy in a standardized way.