A conventional
computerized axial tomography scan (CAT scan or CT scan) is an x-ray
procedure which combines many x-ray images with the aid of a computer to
generate cross-sectional views and, if needed, three-dimensional images
of the internal organs and structures of the body. A CAT scan is used
to define normal and abnormal structures in the body and/or assist in
procedures by helping to accurately guide the placement of instruments
or treatments.
A
spiral CAT scan is a new specialized CAT scan technique that involves
continuous movement of the patient through the scanner with the ability
to scan faster and with higher definition of internal structures. Spiral
CAT scanning can permit greater visualization of blood vessels and
internal tissues, such as those within the chest cavity. This form of
scanner may be particularly helpful in the rapid evaluation of severe
trauma injuries, such as those sustained in automobile accidents.
A spiral CAT scan is also referred to as helical CAT scan.
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