Nuclear medicine examination can be early detection of cancer, but most of the patients “hear nuclear color change”, fear of nuclear medicine radiation damage and dare not use. A few days ago, “2007 China Nuclear Medicine Week” national start-up day held in Shanghai Renji Hospital (East Hospital). Chinese nuclear medicine branch vice chairman, Renji Hospital, director of nuclear medicine, Professor Huang Gang emphasized: nuclear medicine examination is safe, a nuclear medicine imaging examination of the radiation dose received by the examinee is equal to or lower than an X-ray chest X-ray examination. The reporter learned that nuclear medicine is mainly the application of radionuclide tracer technology for the diagnosis and treatment of disease medical disciplines. At present, there are more than 30 hospitals in the city with nuclear medicine departments above the second grade. Compared with the results of surgical pathology, the diagnostic correctness rate of CT examination of a few hundred dollars is about 65% to 70%, and the diagnostic correctness rate of positron emission computed tomography (PET), which is the most sensitive diagnostic imaging technology for malignant tumors, can reach 85% to 90%. It can not only diagnose various malignant tumors and their metastatic foci early and accurately, but also greatly improve the correct rate of clinical diagnosis. Prof. Huang Gang explains, because the test is carried out in the test tube, will not have any contact with the examinee, the amount of reagents used is also very small, so it will not bring any impact on the examinee; even in the diagnosis of nuclear medicine imaging, to a certain amount of radiopharmaceuticals through the injection or oral way to introduce into the examinee’s body, but due to the use of radionuclide reagents with a short half-life, low-energy, low dosage, and therefore generally does not have any effect on the human body. Nuclear medicine examination is safe.