Real-time imaging of regional myocardial function using fast-SENC

A technique for fast imaging of regional myocardial function using a spiral acquisition in combination with strain‐encoded (SENC) magnetic resonance imaging (MRI) is presented in this paper. This technique, which is termed fast‐SENC, enables scan durations as short as a single heartbeat. A reduced f...

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Bibliographic Details
Published in:Magnetic resonance in medicine 2006-02, Vol.55 (2), p.386-395
Main Authors: Pan, Li, Stuber, Matthias, Kraitchman, Dara L., Fritzges, Danielle L., Gilson, Wesley D., Osman, Nael F.
Format: Article
Language:English
Subjects:
Animals
cardiac MRI
Dogs
Heart - physiology
Humans
Magnetic Resonance Imaging, Cine - methods
Phantoms, Imaging
real-time imaging
regional myocardial function
SENC
spiral imaging
strain-encoding
strain‐encoding, SENC
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Summary:A technique for fast imaging of regional myocardial function using a spiral acquisition in combination with strain‐encoded (SENC) magnetic resonance imaging (MRI) is presented in this paper. This technique, which is termed fast‐SENC, enables scan durations as short as a single heartbeat. A reduced field of view (FOV) without foldover artifacts was achieved by localized SENC, which selectively excited the region around the heart. The two images required for SENC imaging (low‐ and high‐tuning) were acquired in an interleaved fashion throughout the cardiac cycle to further shorten the scan time. Regional circumferential contraction and longitudinal shortening of both the left ventricle (LV) and right ventricle (RV) were examined in long‐ and short‐axis views, respectively. The in vivo results obtained from five human subjects and five infarcted dogs are presented. The results of the fast‐SENC technique in a single heartbeat acquisition were comparable to those obtained by conventional SENC in a long acquisition time. Therefore, fast‐SENC may prove useful for imaging during stress or arrhythmia. Magn Reson Med, 2006. © 2006 Wiley‐Liss, Inc.
ISSN:0740-3194
1522-2594
DOI:10.1002/mrm.20770