A CT, or CAT scan, is a valuable, painless diagnostic test that allows radiologists to see inside some areas of the body that cannot be seen using conventional x-rays. This imaging method produces a series of pictures that are then reconstructed by a computer into cross-sectional views. Areas of the body that may undergo a CT scan include the chest, abdomen, pancreas, kidneys, pelvis, bones and joints, brain, spine, face, and neck. CT can also guide biopsies, aspiration, and drainage. CT scans allow doctors to detect many medical conditions in the early stages of development. Early detection increases your treatment options and success rates.