Four-dimensional single breathhold magnetic resonance imaging using kt-BLAST enables reliable assessment of left- and right-ventricular volumes and mass.

Purpose To prospectively determine the accuracy of four-dimensional (4D) kt-broad-use linear acquisition speed-up technique (BLAST) accelerated MRI (kt-BLAST) for the assessment of left-ventricular (LV) volumes and mass as well as right-ventricular (RV) volumes in comparison to standard multiple breathhold cine imaging. Materials and Methods A total of 40 patients with suspected or known coronary artery disease (CAD) underwent cardiac MRI. In each patient a standard multislice cine steady-state free precession (SSFP) sequence was performed with complete ventricular coverage during multiple breathholds. Additionally, a kt-BLAST-accelerated 4D sequence with complete ventricular coverage was acquired during one single breathhold. For comparison of SSFP and kt-BLAST, the following LV parameters were determined: end-diastolic and end-systolic volumes, ejection fraction, end-diastolic diameter and mass. For comparison of RV dimensions, end-diastolic and end-systolic volumes and ejection fraction were assessed. Results LV volumes, ejection fraction, diameter, and mass showed a strong correlation between SSFP and kt-BLAST (r = 0.98-0.99; P < 0.01). In addition, RV parameters demonstrated a high correlation (r = 0.97-0.98; P < 0.01). For all parameters, the calculated bias between both methods was found to be minimal (0.4-4%). Conclusion 4D kt-BLAST-accelerated MRI enabled the accurate assessment of LV and RV quantitative parameters during one single breathhold when compared to standard multislice, multiple breathhold SSFP imaging. J. Magn. Reson. Imaging 2007. © 2007 Wiley-Liss, Inc. [ABSTRACT FROM AUTHOR]