Improved Coronary MR Angiography Using Wideband Steady State Free Precession at 3 Tesla With Sub-millimeter Resolution

被引：6
作者：
Lee, Hsu-Lei [1 ]
Shankaranarayanan, Ajit [2 ]
Pohost, Gerald M. [1 ,3 ]
Nayak, Krishna S. [1 ,3 ]
机构：
[1] Univ So Calif, Ming Hsieh Dept Elect Engn, Los Angeles, CA USA
[2] GE Healthcare, Global Appl Sci Lab, Menlo Pk, CA USA
[3] Univ So Calif, Keck Sch Med, Los Angeles, CA 90033 USA
来源：
JOURNAL OF MAGNETIC RESONANCE IMAGING | 2010年 / 31卷 / 05期
基金：
美国国家卫生研究院;
关键词：
coronary artery imaging; balanced SSFP; wideband SSFP; alternating repetition time; MAGNETIC-RESONANCE ANGIOGRAPHY; ARTERY-DISEASE; TRUE-FISP; 1.5; T; SSFP; SEQUENCES; STABILIZATION; ACQUISITION; REDUCTION; CONTRAST;
D O I：
10.1002/jmri.22150
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：
Purpose: To suppress off-resonance artifacts in coronary artery imaging at 3 Tesla (T), and therefore improve spatial resolution. Materials and Methods: Wideband steady state free precession (SSFP) sequences use an oscillating steady state to reduce banding artifacts. Coronary artery images were obtained at 3T using three-dimensional navigated gradient echo, balanced SSFP, and wideband SSFP sequences. Results: The highest in-plane resolution of left coronary artery images was 0.68 mm in the frequency-encoding direction. Wideband SSFP produced an average SNR efficiency of 70% relative to conventional balanced SSFP and suppressed off-resonance artifacts. Conclusion: Wideband SSFP was found to be a promising approach for obtaining noncontrast, high-resolution coronary artery images at 3 Tesla with reliable image quality.
引用
收藏
页码：1224 / 1229
页数：6
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