Computed Tomography (CT) or Computed Axial Tomography (CAT) Scan
Computed Tomography (CT) or Computed Axial Tomography (CAT) uses special X -ray equipment to obtain image data from different angles around the body. A computer processes the information to show a cross-section of body tissues and organs. CT scans can be used to see if tissues in the body are fluid or solid, can be used to diagnose tumors, internal injuries and various other abnormalities of the body.
How does it work?
Specific amounts of X-rays are passed through the body. An X-ray beam is
emitted in a fan shape as the rotating frames spin the X-ray tube and detector
around the patient. Each time the X-ray tube and detector make a complete
rotation, the image of a thin section of the body is acquired. Computer
processing allows the information from the detectors to be reconstructed into 2
and 3-dimensional images.
How else CT is used?
CT scans are noninvasive, painless and accurate. Diagnoses from CT scans can
prevent the need for invasive surgery. CT can be used for interventional
procedures, assisting in the acquisition of specimens and in performing
therapeutic procedures.
Computed Tomography Angiography
Computed Tomography Angiography (CTA) is a special kind of CT scan that
visualizes blood flow in arterial and venous vessels throughout the body, from
arteries serving the brain to those bringing blood to the lungs, kidneys, and
arms and legs. The exam is also used to identify aneurysms in the aorta and
other major blood vessels.
