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Conventional x-ray technique uses an x-ray machine which focuses radiation beams on the effected area of the body to produce 2D images on a film or digital detector. CT scans use x-ray machines which rotate around the body and the output is shown on a computer. The images of the internal parts of the body come in cross sectional mode like slices. Most of the doctors prefer CT scan over conventional x-ray for many reasons. Some of them are: Conventional x-ray of a body part shows the bones and the overlapping outlines of softer parts like liver, heart, stomach, intestines, kidney and so on whereas a CT scans clearly show the bones and organs with the inner structure with a detailed anatomy of the pancreas, kidneys, blood vessels, adrenal glands etc. CT scan also helps in diagnosing bone and muscle disorders like tumors and fractures, pinpoints the location of the tumor, infection and blood clot, guides in surgeries, biopsy and radiation therapy, detects and monitors cancer and heart diseases and detects minor injuries & internal bleedings. In the process of CT scans, the patient lies on a table in a doughnut shaped machine named gantry. The machine has an x-ray tube which rotates around the body and transmits small quantity radiation through the various angles. Different tissues of the body absorb different quantity of the radiation as the x-rays pass through the body. The detectors measure the radiation and convert the radiations in electrical signals. The powerful computer which is attached to the machine gathers the signals and assigns a color to them which depend on the intensity of the signal. Finally the computer assembles these images and shows on the monitor. CT scans help in quick diagnosis. Those who want to be diagnosed quickly can take help of CT scan which works on renal-colic-study principle. The standard procedure is followed for immediate diagnosis of kidney pain and other types of problems in human body. CT scans are much costlier than conventional x-rays but a CT scan reveals what an x-ray can not and helps in quick treatment in a proper way. About The Author Lee Bond is a renowned radiology expert who has over 10 years of experience in the field, and another 10 as a regular surgeon.For more information, please visit CT scans.
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