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 positron emission tomography scan is an imaging test that uses nuclear medicine to view the body on a cellular level. The PET scan measures body functions, such as blood flow, metabolism and oxygen use, and may be used to detect disease, like cancer, and heart and brain problems.