Nuclear u99 injection is injected into the body as an imaging agent, which can be checked by computerized imaging system (SPECT), similar to taking photos 1.Bone scan of the whole body: ①, detecting bone metastases 3-6 months earlier than X-ray; ②, seeing whether there are lesions in the bone of the whole body in one examination; ③, the examination is safe, easy, non-invasive and painless. 2. Myocardial imaging: Nuclear myocardial perfusion imaging can help assess the prognosis of patients with coronary artery disease and estimate the risk level. Nuclear myocardial perfusion imaging is to observe the growth of rice (ischemia of myocardium), while multi-row CT and coronary angiography are to observe whether there is blockage in the aqueduct (obstruction of aqueduct). 3, renal dynamics: renal dynamic imaging can understand the function of the kidney and the degree of renal function impairment, and can also determine whether there is obstruction in the urinary tract. Some of the commonly used clinical laboratory tests of renal function can only get the function of the sum of the two kidneys, and cannot understand the specific situation of each kidney. The nephrogram and renal dynamic imaging can observe and judge the function of each kidney and the situation of each side of the urinary tract. 4.Parotid gland dynamic: Evaluate the function of salivary gland, diagnose dry syndrome, and the occupancy of salivary gland, etc. 5.Thyroid imaging: When there is a lump in the thyroid gland of the neck, thyroid imaging can tell you the functional status of the lump, usually there are hot nodules, cold nodules, warm nodules, etc., which can further clarify whether it is a benign or malignant tumor.