Helical and Single-Slice Conventional CT Versus Electron Beam CT for the Quantification of Coronary Artery Calcification

210 patients (symptomatic and asymptomatic suspected of having coronary artery disease). 160 male patients underwent both electron beam CT and conventional CT, and another 50 patients underwent repeated electron beam CT.

Conventional CT (helical mode with pitch 1 [n=30] or 2 [n=30], and single-slice mode with [n=50] or without [n=50] prospective ECG triggering)

Electron beam CT

Coronary calcium score (Agatston method) agreement, assessed by correlation coefficient and mean variabilitysurrogate