Also found in: Dictionary, Thesaurus, Medical, Financial, Acronyms, Encyclopedia, Wikipedia. contractor. n. 1) a person or entity that enters into a contract. 2) commonly, a person or entity that agrees to construct a building or to provide or install specialized portions of the construction.
Test Overview. Coronary calcium scans use a special X-ray test called computed tomography (CT) to check for the buildup of calcium in plaque on the walls of the arteries of the heart (coronary arteries). This test is used to check for heart disease in an early stage and to determine how severe it is. Coronary calcium scans are also called cardiac calcium scoring. The coronary arteries supply blood to the heart. Normally, the coronary arteries do not contain calcium. Calcium in the coronary arteries is a sign of coronary artery disease (CAD) . A CT scan takes pictures of the heart in thin sections. The pictures are recorded in a computer and can be saved for more study or printed out as photographs.
A CT (computed tomography) scan is a type of specialized X-ray that can show cross-sectional images of a specific area of the body. In a CT scan, the machine circles the body and sends the images to a computer, where they are viewed by a technician. Each picture is viewed as a cross section (like a piece of sliced bread) of the body to provide doctors with alternate views of your body.