Computerized axial tomography scan
Pictures of structures within the body created by a computer that takes the data from multiple X-ray images and turns them in pictures. The CAT (computerized axial tomography) scan can reveal some soft-tissue and other structures that cannot be seen in conventional X-rays. Using the same dosage of radiation as that of an ordinary X-ray machine, an entire slice of the body can be made visible with about 100 times more clarity with the CAT scan. The "cuts"(tomograms) for the CAT scan are usually made 5 or 10 mm apart. The CAT machine rotates 180 degrees around the patient's body; hence, the term "axial." The machine sends out a thin X-ray beam at 160 different points. Crystals positioned at the opposite points of the beam pick up and record the absorption rates of the varying thicknesses of tissue and bone. The data are then relayed to a computer that turns the information into a 2-dimensional cross-sectional image. CAT scanning was invented in 1972 by the British engineer Godfrey N. Hounsfield (later Sir Godfrey) and the South African (later American) physicist Alan Cormack. CAT scanning was already in general use by 1979, the year Hounsfield and Cormack were awarded the Nobel Prize in Medicine or Physiology for its development. The CAT scan is also known as the CT (computerized tomography) scan.

Medical dictionary. 2011.

Look at other dictionaries:

  • computerized axial tomography scan — A series of detailed pictures of areas inside the body taken from different angles. The pictures are created by a computer linked to an x ray machine. Also called CAT scan, computed tomography scan, CT scan, and computerized tomography …   English dictionary of cancer terms

  • Scan, computerized axial tomography — Pictures of structures within the body created by a computer that takes the data from multiple X ray images and turns them in pictures. The CAT (computerized axial tomography) scan can reveal some soft tissue and other structures that cannot be… …   Medical dictionary

  • computerized axial tomography — the process of producing a CAT scan. Also called computed tomography, computer assisted tomography, computerized tomography. Cf. CAT scanner. [1970 75] * * *        diagnostic imaging method using a low dose beam of X rays that crosses the body… …   Universalium

  • Computerized axial tomography (CAT) — Cat scanning adds X ray images with the aid of a computer to generate cross sectional views anatomy. It can identify normal and abnormal structures and be used to guide procedures. CAT scanning is painless. Iodine containing contrast material is… …   Medical dictionary

  • computerized axial tomography — comput′erized ax′ial tomog′raphy n. med the process of producing a CAT scan Compare CAT scanner • Etymology: 1970–75 …   From formal English to slang

  • Axial tomography, computerized — Pictures of structures within the body created by a computer that takes the data from multiple X ray images and turns them in pictures. The CAT (computerized axial tomography) scan can reveal some soft tissue and other structures that cannot be… …   Medical dictionary

  • Tomography, computerized axial — Pictures of structures within the body created by a computer that takes the data from multiple X ray images and turns them in pictures. The CAT (computerized axial tomography) scan can reveal some soft tissue and other structures that cannot be… …   Medical dictionary

  • computed tomography scan — CT scan. A series of detailed pictures of areas inside the body taken from different angles; the pictures are created by a computer linked to an x ray machine. Also called CT scan, computerized tomography, computerized axial tomography scan, and… …   English dictionary of cancer terms

  • Computerized tomography — Pictures of structures within the body created by a computer that takes the data from multiple X ray images and turns them in pictures. The computerized tomography (CT) scan can reveal some soft tissue and other structures that cannot be seen in… …   Medical dictionary

  • Scan, computerized tomography — Pictures of structures within the body created by a computer that takes the data from multiple X ray images and turns them in pictures. The computerized tomography (CT) scan can reveal some soft tissue and other structures that cannot be seen in… …   Medical dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”