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Background— Multislice spiral computed tomography (MSCT) is a promising technique for noninvasive coronary angiography, although clinical application has remained limited because of frequently incomplete interpretability, caused by motion artifacts and calcifications.

Methods and Results— In 59 patients (53 male, aged 58±12 years) with suspected obstructive coronary artery disease, ECG-gated MSCT angiography was performed with a 16-slice MSCT scanner (0.42-s rotation time, 12×0.75-mm detector collimation). Thirty-four patients were given additional β-blockers (average heart rate: 56±6 min⁻¹). After contrast injection, all data were acquired during an approximately 20-s breath hold. The left main (LM), left anterior descending (LAD), left circumflex (LCX), and right coronary artery (RCA), including ≥2.0-mm side branches, were independently evaluated by two blinded observers and screened for …