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What is it?
Micro-dose coronary CT angiography (CCTA) is a new approach for selected patients being offered at Cedars-Sinai. Micro-dose CCTA uses prospective gating with imaging during only 1/10 of the cardiac cycle. Micro-dose CCTA assesses coronary stenosis as well as the extent of non-calcified ("soft") plaque and calcified plaque. The study does not provide information about ventricular function. This study is not covered by insurance. Physician prescription is required.
Why a "Micro-Dose" CCTA?
"Micro-dose" CCTA provides a simplified CCTA examination with 1/10th of the radiation dose and reduced cost.
Why Is This Better than a CT Coronary Calcium Scan?
The coronary calcium scan cannot visualize noncalcified plaques--plaques more prone to rupture than calcified plaques. "Micro-Dose" CCTA assesses the amount of noncalcified plaque, potentially providing better risk assessment and an opportunity to monitor the effectiveness of therapy. Noncalcified plaques may shrink with effective treatment.
Who Should Consider This Procedure?
Selected asymptomatic patients being screened for coronary artery disease. Not a test for patients with extensive coronary calcium or arrhythmia.