Radiology camera is an extremely sensitive camera that detects the distribution of radioactivity in the body over seconds, hours, or days. It can be used to measure the function of most organs in the body including the heart, kidney, liver, gallbladder, and lungs. It can measure thyroid function, reveal blood clots in the lungs, and track blood flow to the heart or other organs. It can help explain previously unexplained bone and abdominal pain and identify the spread of cancer. It can also measure how the heart reacts to stress.