A result that is not likely to occur randomly, but rather is likely to be attributable to a specific cause. Statistical significance can be strong or weak, and is important to research in many math-and science-related fields, including medicine, sociology, psychology and biology.
A nuclear scan is an imaging test that uses imaging technology and trace amounts of radioactive materials, called radiotracers, to diagnose and monitor diseases and treatments. Nuclear scans can show the structure and function of most body organs and tissues.
A CT scan may be used to make sure a procedure is done correctly. For example, the doctor may use CT to guide a needle during a tissue biopsy or to guide the proper placement of a needle to drain an abscess. For people with cancer, a CT scan can help determine how much the cancer has spread.