CAT scans
These days most people have heard of CT scans (also known as Cat scans), but not many have had one done. When a doctor recommends this test, patients may be understandably nervous and worried about what is involved.
CT stands for computerised tomography and is a special type of X-ray using highly complex equipment. Like most ordinary X-rays, it is a painless procedure for the patient. It allows the radiologist to look inside various parts of the body to see what is going on and exactly where.
If you knew that something was hidden inside a loaf of bread the obvious way to find it would be to cut the loaf into slices. In just the same way, a Cat scan takes a series of X-rays of different ‘slices’ of the part of the body being examined. The information obtained is processed by a computer and a series of X-ray pictures obtained.
The patient lies on a moving table that slides inside the machine that has been aptly described as looking like a ‘square doughnut’. The patient lies still and various parts inside the machine move around taking the pictures. Being inside the machine may be a slightly unpleasant experience for some, especially those who suffer from claustrophobia (fear of confined spaces). However, the whole procedure usually takes only 20 to 40 minutes.
For some scans an injection of a dye may be given to give a clearer picture or additional information.
The Cat scan is a very useful test for diagnosing many different conditions. It has replaced many uncomfortable and unpleasant tests that were done before it was invented. It allows doctors to diagnose accurately and treat patients more effectively.
If you need a Cat scan there is no need to be afraid. Lie back and be fascinated by one of the wonders of modern science.
Last Reviewed: 24 August 2005
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