Coronary risk assessment at X-ray dose equivalent ungated chest CT: Results of a multi-reader study

Objectives To determine the value of ultra-low dose chest CT with tin filtration for ordinal coronary artery calcium (CAC) risk scoring. Methods 50 patients were prospectively included and underwent clinical standard dose chest CT (1.8 ± 0.7 mSv) and ultra-low dose CT (0.13 ± 0.01 mSv). Four radiologists estimated presence and extent of CAC. Results Weighted kappa values for CAC were 0.76–0.97 in standard dose and 0.75–0.95 in ultra-low dose CT...