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Coronary computed tomography angiography (CTA) is used to evaluate whether chest pain symptoms are a result of acute coronary syndrome. Triple-rule-out CT evaluates the coronary arteries, thoracic aorta, and pulmonary arteries, thereby providing greater anatomic coverage than CTA, but it requires a higher radiation dose (mean, 4.84 mSv higher) and larger contrast bolus (mean, 38.0 mL higher). To evaluate its diagnostic yield, researchers retrospectively analyzed all triple-rule-out CT scans performed for evaluation of chest pain in the emergency department (ED) at a single center from 2006 to 2015. The analysis included scans performed using a 256-MDCT scanner with electrocardiogram gating and biphasic contrast injection.
Of 1192 patients, 8…