PURPOSE: To determine left ventricular (LV) volumetric and functional parameters from retrospectively electrocardiographically gated multi–detector row computed tomography (CT) by using semiautomated analysis software and to correlate results with those of magnetic resonance (MR) imaging. MATERIALS AND METHODS: In 18 patients (mean heart rate: 78.2 짹 11.2 for CT vs 7384 짹 12.3 for MR) known to have coronary artery disease, 16-channel multi–detector row CT was performed with standard technique, and diastolic and systolic image reconstructions were generated. With commercially available analysis software capable of semiautomated contour detection, end diastolic and end systolic LV volumes were determined from short-axis view. Steady-state free-precession cine MR images were acquired in short-axis orientation within 24 hours and analyzed by using dedicated software. RESULTS: Mean end diastolic (132.7 mL 짹 56.3) and end systolic (83.8 mL 짹 57.3) LV volumes as determined with CT correlated well with MR imaging measurements (124.7 mL 짹 46.3) and 78.1 mL 짹 51.1, respectively (P < .001). LV ejection fraction (43.5% 짹 21.6 for CT vs 44.5 % 짹 21.6 for MR imaging) and stroke volume (48.4 mL 짹 17.5 for CT vs 46.9 mL 짹 13.7 for MR imaging) also showed good correlation (P < .001). CONCLUSION: LV volumetric and functional analysis based on 16-channel multi–detector row CT data correlate well with MR imaging findings.