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

✍ Scribed by Cosima Jahnke; Eike Nagel; Rolf Gebker; Axel Bornstedt; Bernhard Schnackenburg; Sebastian Kozerke; Eckart Fleck; Ingo Paetsch

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 412 KB
• Volume: 25
• Category: Article
• ISSN: 1053-1807
• DOI: 10.1002/jmri.20877

✦ Synopsis

Abstract

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.