Admin_NHT Staff asked 6 years ago A computed-tomography or a CT scan is the superimposition of multiple X-ray images taken from different angles to create a cross-sectional view of the patient. A CT scan allows better imaging and positional modality as compared to an X-ray which only provides limited perspective. The individual is given a contrast reagent either orally or intravenously, this reagent helps the structural boundaries to be differentiated against each other. The individual is then asked to lie down on the sliding platform and is then slid into the CT machine. The contrast reagent is discarded by the body after a couple of hours.
Before undergoing the scan, the patient is asked to remove all metallic objects including jewellery, dentures, belts, spectacles, or anything that might interfere with the scan. The patient may also be asked to remove some items from his clothing. It is also advised to refrain from eating or drinking anything prior to a few hours of the scan as the food or fluid movement may produce incorrect results.
A CT scan is not recommended for new born babies or for people with implanted medical devices such as pacemakers, or metal plates as supporting structures for skeletal muscle. A radiologist is in a separate room monitoring you throughout the duration and may ask you to hold your breath at certain points of time to avoid blurry images. The whole process takes about 30 minutes and is performed as an outpatient assessment. As everything is computerized, the results are available fairly quick and may be sent to the doctor immediately.