In the process of tumor treatment, we will learn about conformal modulation, which is also referred to as intensity modulation and conformality. Conformal intensity modulation can be performed through high-tech technology according to the specific shape of the tumor. Conformal modulation maximizes the radiation dose to the tumor and minimizes the radiation volume and dose to the surrounding normal tissues and organs. What is Conformal Intensity Modulated Radiotherapy? ”Conformal Intensity Modulation (CIM) is one of the most advanced radiotherapy systems in the world. It means that the shape of the radiation field and the dose of radiation are consistent with the actual shape of the target area (tumor) in the 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 than conformal. The advantages of three-dimensional conformal intensity modulated radiotherapy: 1, the radiation therapy has a wide range of indications, and reflex therapy can be considered for tumor patients who cannot tolerate surgery or chemotherapy and whose general condition is still good. 2.The efficacy of radiotherapy is certain, no anesthesia, no incision, less pain, no infection, and less pay effect. 3. As non-invasive treatment, radiotherapy can generally preserve the physiological function of patient’s organs. 4.Precise positioning: precise treatment; precise positioning; guaranteed treatment. 5.Urological and reproductive system tumors: pelvic tumors, kidney cancer and including prostate cancer, etc. 6. Bone tumors : including osteosarcoma,, chondrosarcoma, fibrosarcoma, etc.