I. Is X-Blade suitable for me? 1.X-knife refers to the irradiation of tumor tissues in large doses within a short period of time to produce effects similar to surgical resection. 2.The main scope of X-blade is as follows: Head and neck: intracranial tumors such as glioma, pituitary tumor, auditory neuroma, lesser number of brain metastases, brain metastases that are not effective after whole brain irradiation; nasopharyngeal cancer and other head and neck tumors that still have residual after radical radiotherapy. Thorax and abdomen: inoperable early stage non-small cell lung cancer, small hepatocellular carcinoma, limited lung metastases, limited liver metastases or retroperitoneal metastatic lymph nodes. Benign lesions such as intracranial arteriovenous malformations. Functional lesions such as trigeminal neuralgia and Parkinson’s syndrome. Cases that are closely related to important normal tissues and are likely to lead to greater damage after surgery, such as tumors in the spinal canal. To sum up, it is mainly applicable to cases with relatively limited lesions. 3, the following cases are not suitable for X knife treatment: the lesion is extensive, and the lesion is close to important organs and tissues, and damage to any part of the tissue can cause the entire organ dysfunction (such as spinal cord, small intestine, etc.) The lesion and the surrounding normal tissue is not clearly demarcated. X knife and gamma knife similarities and differences X knife and gamma knife belong to the same stereotactic radiotherapy, the scope of precision radiation therapy, both in three-dimensional space, short time, less fraction, high dose, multifield irradiation, the purpose is to give tumor cells devastating blow, to achieve similar to the purpose of surgery, its treatment principle is the same. The differences are: 1, the quality of radiation is different: as the name implies, the former for linear gas pedal generated X-rays, the latter using cobalt sources generated by gamma rays. 2, gamma knife higher precision, the error range is smaller, but the need for positioning time and treatment time is longer, more suitable for the scope of smaller, less dynamic lesions, such as intracranial diameter of less than 3cm lesions, arteriovenous malformations, etc.. 3.X-knife is a fractionated treatment based on the use of linear gas pedal with the help of special collimators of different sizes. Its penumbra is relatively small and the collimator has a wide range of diameters, which is suitable for relatively large or obvious active lesions, such as lung, liver and other thoracic and abdominal lesions. What is the difference between X-knife and ordinary radiotherapy Compared with ordinary radiotherapy, the dose of X-knife drops faster, which can concentrate higher dose in the tumor area and make the surrounding normal tissue damage the least. At the same time, the single dose is higher than that of ordinary radiotherapy, and with reference to the dose effect formula of radiotherapy, it is more effective in killing tumor cells with the same total dose. The treatment time is shorter than normal radiotherapy. However, because of its high dose in the central area of the tumor, it requires higher precision in positioning than conventional radiotherapy. IV. Preparation required before and after receiving X-blade Before receiving X-blade treatment, firstly, we should obtain imaging information to clarify the area to be irradiated, after that, we should collect images, outline the target area, calculate the three-dimensional shape, location, coordinates, formulate the treatment plan and review the dose line; after that, we should reposition the equal dose center and so on. The treatment should be followed by regular review, blood test and attention to skin protection. In addition it should be treated according to the corresponding situation of different sites. For example, head and neck tumors open mouth training, maintain oral hygiene, chest tumors pay attention to soft food and prevent cold.