A nuclear scanner is a medical imaging tool used to detect radiation emitted by radioactive isotopes injected or ingested into the body. It is also known as a gamma camera or scintillation camera. It is a highly sensitive imaging tool used to diagnose and evaluate medical conditions. The nuclear scanner works by detecting gamma rays emitted by the radioactive isotopes. These isotopes are introduced into the body through injection, ingestion or inhalation. As the isotopes travel through the body, they emit gamma rays, which are detected by the scanner. The scanner uses a special camera that detects the gamma rays and converts them into a digital image. The images produced by the scanner show the distribution of the isotopes throughout the body and help doctors to diagnose medical conditions. Nuclear scanners are commonly used in the diagnosis and treatment of cancer. They can detect the presence of cancerous tumors and determine the extent of the disease. The scanner can also be used to monitor the progress of cancer treatment and to detect any recurrence of the disease. In addition to cancer diagnosis and treatment, nuclear scanners are also used in cardiology, neurology, and other medical specialties. For example, in cardiology, the scanner can be used to detect blood flow to the heart and to diagnose heart conditions such as coronary artery disease. The use of nuclear scanners is safe, and the amount of radiation exposure is minimal. The isotopes used in the scanner are short-lived, and they are eliminated from the body within a few hours. Patients may experience some discomfort during the injection of the isotopes, but this is usually mild and short-lived. In conclusion, the nuclear scanner is an important tool in medical diagnosis and treatment. It provides highly detailed images of the body and can detect medical conditions that may be difficult to diagnose using other methods. Its use is safe and non-invasive, and it has proven to be a valuable asset in modern medicine.