Computed tomography screening in risk assessment for coronary artery disease
Multi-detector computed tomography (MDCT), also known as multi-slice CT, is an advanced imaging technique that combines the use of x-rays with computerised analysis to measure the presence of coronary artery calcification, an indicator of the presence of coronary artery atherosclerosis. The use of multiple rows of detectors enables up to 64 thin image slices to be obtained simultaneously. MDCT is capable of 3D imaging the whole heart in less than 10 seconds with submillimetre isotropic resolution. Although MDCT is associated with exposure to radiation, a low-dose technique using prospective ECG gating can minimise levels of exposure for screening purposes.