Diagnostic Examination With Computed Tomography (CT)

Monday, October 20, 2014

Diagnostic Examination With Computed Tomography (CT)

 Computed Tomography (CT) or computed tomography is a diagnostic method that uses special X-rays to produce cross-sectional images of the body. With CT scanning (CT scan) as slicing body parts within a few millimeters thick and mapping with the help of computers to be evaluated as needed.

The first CT scanner was developed in 1960 by G.Hounsfield and A. Cormack, who accompanied them on the Nobel Prize in medicine in 1979. Since then, the technology continues to be improved. In 1998, the multi-detector technique that allows three-dimensional cross-sectional images was introduced. The latest generation of CT scanners can take pictures quickly with very detailed results.

How is the scan performed?

When a CT scan, you have to body position as sleeping, usually on an examination bed pushed slowly into a tube that will send X-rays through your body. When the regular X-rays have a single X-ray beam width, the CT scan the file a lot, very thin, and the shining of a series of corners. On the opposite side of the tube, there is a recording system (detectors) are noted after the X-ray beam attenuation through a variety of different structures in your body. The weakening of the strongest is when through the bone, while the weakest is when through the air as the lungs, intestines and paranasal sinuses. The difference in intensity values ​​will form a cross-graded gray for the body part being studied.

Processing of cross-sectional images of a series of different angles by the computer will generate three-dimensional images that give a complete picture of the body part being studied. Figure it can be played from different angles and enlarged to be more easily viewed and interpreted. The scans will be evaluated by a radiologist, who then make a report to the referring physician.

Preparation of CT scans

In general, the CT Scan does not require any special preparation. For examination of the digestive organs, you may be asked to fast prior to scanning or need to take laxatives to cleanse the bowel. To clarify the differences between healthy and diseased tissue, you may be asked to take the iodine-based contrast agent (iodine) through drinking, intravenous catheters. For example, the examination of the colon and rectum, mouth or contrast agents inserted to; on examination of blood vessels, a contrast agent is passed through the catheter into the blood vessel; on joint problems, a contrast agent is injected directly into the joint being examined.
And now the CT Scans is ready for use.