Nuclear medicine is the branch of science in which radioactive isotopes are used for the diagnosis and treatment of many diseases. The nuclear medicine department, where radioactive substances are used to evaluate organ functions, has an important place in early diagnosis of diseases and arranging appropriate treatment. Advanced imaging devices and techniques are widely used, especially by oncology, cardiology, cardiovascular surgery and neurology departments. Nuclear medicine methods are also used in the diagnosis of thyroid, endocrine system, kidney, genital system, stomach, intestine, liver, biliary tract, cancer and many other diseases.

In nuclear medicine applications, imaging of bones, tissues or organs is done with pharmaceuticals taken intravenously or orally, or in other words, with a number of special drugs given to the patient. Pharmaceuticals given specifically for each tissue and system become visible to the gamma camera by emitting gamma rays when used for diagnosis. Thus, it can be easily seen where and at what level the molecule marked with the radioactive substance is located. Radioactive substances given to the body for treatment purposes emit beta rays. Thus, it is aimed to restore the health of the patient by deforming unwanted tissues such as tumors in bones, tissues and organs.