Description

Radiology (Computed tomography)

Computed tomography, or CT, refers to a computed
X-ray imaging procedure. In this imaging method, a narrow X-ray is quickly rotated
in the body by producing the signals processed by the machine’s computer.
Creates cross-sectional images or slices toward the body. These images are
called computed tomography images and contain more detailed information than
the old X-rays. A series of sequential cross-sectional images are
collected by computer, allowing the patient to more easily identify and locate
possible tumors or abnormalities, as well as their basic size structures.

How does computed tomography (CT) work?

In contrast to traditional X-rays using a fixed X-ray
tube, computed tomography uses a motorized X-ray source that rotates around the
circular aperture of a so-called Portal structure. During a computerized
tomography scan, the patient moves around the X-ray tube and slowly extends to
a bed that moves from the portal and draws the x-ray. BT scanners use
special digital X-ray detectors placed directly in front of the X-ray source
instead of the film. The resulting images are transferred to the computer.

When the X-ray source completes the full rotation, the IT
computer uses complex mathematical techniques to create a 2D image of the
patient. The thickness of the tissue used in each image varies depending
on the machine, but is usually between 1-10 millimeters. When the movement
is complete, the image is stored and the motored is gradually moved into the
portal. The X-ray scan is then repeated to produce another image
slice. This process continues until the desired number of images are
collected.

In addition to the abnormality that the doctor is trying to
identify, image segments, organs and tissues can be recorded individually to
create a 3D image of the patient. This method has many advantages, including
the ease of rotating 3D images or displaying cross-section images repeatedly,
making it easier to locate a disease.

What diseases are used in computed tomography (CT)?

CT scans can be used to identify disease or injury in
various parts of the body. It has become a useful screening tool to detect
possible tumors or lesions in the abdomen. When suspected of various heart
diseases or abnormalities, a CT scan of the heart may be requested. CT can
also be used to detect injuries, tumors, clots that cause paralysis, bleeding,
and other conditions. It may display the lungs to reveal the presence of
tumors, pulmonary embolism (blood clots), excessive fluid, emphysema, or other
conditions such as pneumonia. CT scan can detect particularly complex bone
fractures, severely worn joints, or bone tumors. It gives more detail than
possible from a traditional X-ray.