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In CT, an x-ray beam moves in a circular motion around the body. This allows many different cross-sectional views of the same organ and provides much greater detail for a more precise interpretation. X-ray information is then processed to display the 2-dimensional computer-generated image. In some instances, the data is processed to display three dimensional (3D) images. The common procedures are listed below:
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Indication for a CT Scan
CT scans may be performed to help diagnose tumours, evaluate or assess blood vessels, determine calcium "scores" of the coronary arteries or check for other internal diseases, injuries or damage.
For all CT scans that require a contrast injection, a U+E, creatinine and eGFR test will be required before the scan is done. Please let the medical secretary know at the time of booking about any allergies, diabetes, and kidney problems that you could possibly have.
A CT scan is a diagnostic imaging procedure that combines x-ray technology and computer-generated cross-sectional images or "slices" of the body. A CT scan shows detailed images of any part of the body, including bones, muscles, fat, blood vessels and organs.
CT Chest
Indication
Chest CT scanning provides a detailed assessment of the lungs, chest wall and central hilar structures. Common indications include assessment of abnormalities seen on a chest X-ray, staging of tumours, presence and extent of enlarged lymph nodes as well as detailed evaluation of lung parenchymal disorders.
CT Neck
Indication
Provides information on the neck structure including soft tissue, vasculature and airways.
CT Angiography
Indication
This is a procedure used to demonstrate the different blood vessels in the body. This scan shows any abnormalities such as calcifications, strictures, and decreased blood flow.The scan takes between 20 to 30mins. After the scan is completed the radiographer will then begin post processing the images. This can take up to 2 hours to complete as the images are very detailed and take a long time to process.
CT Coronary Angiography
The heart scan is a non-invasive, painless procedure used for early detection of coronary artery disease. Multiple images of the heart are acquired, between each heart beat while the heart muscle is at rest. An iodine based contrast media is injected intravenously in the arm which opacifies the coronary arteries. A radiologist will analyse these images to determine the degree of narrowing of the arteries. This also allows the radiologist to determine the amount of calcified plaque present in the arteries.
CT Virtual Colonoscopy
A CT Colonography is an examination done to visualize abnormalities of the colon.
The patient undergoes bowel preparation before the examination in order to clear the bowel of any faecal matter. A small Foleys catheter is inserted into the rectum and air is introduced to fill the colon. This examination is done to screen for polyps and other lesions in the large intestine.
Indication
Indication
This is examination to detect colonic abnormalities. CT colonography is a much less invasive procedure than a traditional colonoscopy or a barium enema and requires neither sedation nor admission to hospital.
The preparation for the procedure is also less unpleasant.
After the scan the computer generates an image of the colon allowing the radiologist to do a virtual tour through the colon. It is highly accurate in detecting significant polyps, diverticular disease or tumours.