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

被引:82
作者
Pan, L
Stuber, M
Kraitchman, DL
Fritzges, DL
Gilson, WD
Osman, NF
机构
[1] Johns Hopkins Univ, Sch Med, Dept Radiol & Radiol Sci, Baltimore, MD 21287 USA
[2] Johns Hopkins Univ, Sch Med, Dept Biomed Engn, Baltimore, MD USA
[3] Johns Hopkins Univ, Dept Elect & Comp Engn, Baltimore, MD USA
关键词
strain-encoding; SENC; real-time imaging; regional myocardial function; cardiac MRI; spiral imaging;
D O I
10.1002/mrm.20770
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
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.
引用
收藏
页码:386 / 395
页数:10
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