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Radiation Dose Reduction Strategies in Coronary CTA.

Coronary computed tomography angiography (CTA) is a noninvasive method of imaging the heart to aid in the diagnosis of coronary artery disease (CAD). The widespread availability and high diagnostic accuracy of CT scanners has made CTA an important tool in detecting CAD. However, this imaging method introduces the risk of increased radiation in comparison to conventional angiography. This article explores ways to reduce radiation dose in CTA, including use of a lower kilovoltage peak (kVp) setting, prospective gating methods instead of retrospective gating methods, and an iterative reconstruction technique.