CT angiography of the coronary arteries can be performed in just 5-6 seconds of breath holding with this equipment. Motion-free imaging of the heart produces images with sub-millimetre resolution that can be used to analyze calcified and non-calcified plaques in the coronary arteries. The high negative predictive value of this investigation means that a normal CT coronary angiogram study ‘rules out coronary artery disease’. Also, this light-speed VCT XT system acquires scans with up to 70% less radiation dose than conventional cardiac CT, using the unique snapshot method. Coronary artery disease involves progressive narrowing within the walls of the blood vessels due to the formation of plaques. This process is known as Atherosclerosis and is associated with high levels of cholesterol. This can lead to ischemia (lack of oxygen) to the heart muscles resulting in chest pain (angina) or heart attack (infarction)
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