Dual wide-coverage CT with two 16-cm detectors enables motion-free cardiac CT at high and irregular heart rates

New dual wide-coverage CT combines two 16-cm detectors and two tubes; cross-scatter correction preserved spatial and low-contrast resolution, and produced motion-artifact-free cardiac CT at heart rates up to 197 bpm (1.48 mSv).

• Cross-scatter correction preserved spatial resolution (difference < 0.5% at 10% MTF) and low-contrast detectability (3 mm at 0.3% contrast, 47.6 mGy CTDIvol, 1.0 mm slice).
• Motion-artifact-free images were achieved under simulated sinus rhythm at 100 bpm and arrhythmic conditions varying between 75 and 100 bpm.
• In a patient with a mean heart rate of 197 bpm, coronary CT angiography acquired with this mode showed clear coronary arteries at 1.48 mSv.

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