Patient-specific predictors of image noise in coronary CT angiography.

Background: Coronary computed tomography (CT) angiography can be associated with high radiation exposure. Reduction of tube voltage from 120 kV to 100 kV can reduce the dose by up to 40%, but it also increases image noise.

Objective: We aimed to find a patient-specific predictor of image noise to determine the use of reduced tube voltage.