Cardiac Magnetic Resonance Imaging Using an Open 0.35 T System
Cardiac Magnetic Resonance Imaging Using an Open 0.35 T System
复制标题
使用开放式 0.35 T 系统进行心脏磁共振成像
DOI：
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发表时间：
2007
影响因子：
1.3
通讯作者：
Karl
中科院分区：
文献类型：
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作者：
H. Klein;W. Meyners;Benjamin Neeb;J. Labenz;Karl
目的：评价0.35T开放式心脏磁共振成像（MRI）技术.方法：在场强为0.35 T的开放式MRI系统中对11例患者进行检查。在2个平面上采用稳态进动序列电影真快速成像评估心肌功能。灌注图像采集与T1加权梯度回波序列。后期增强采用反转恢复准备的快速梯度回波技术。使用4分一致性评分评估图像质量。测量信噪比。结果：功能成像平均评分为1.65（SD，0.6）。对于灌注成像，该值为2.25（SD，0.68）。晚期增强质量评分为2.6（SD，0.82）。功能成像、灌注成像和晚期增强成像的平均信噪比分别为50.6（SD，16.4）、91.8（SD，52.8）和33.2（SD，20.4）。结论：低场强开放式MRI可用于心脏功能成像。对于灌注和活力成像（后期增强），需要更高的场强。开放式低场心脏MRI可能为肥胖或幽闭恐怖症患者或难以移动的患者提供有用的替代方案。
Objective: To evaluate cardiac magnetic resonance imaging (MRI) using a 0.35 T magnetic resonance system with open design. Methods: Eleven patients were examined in an open MRI system with a field strength of 0.35 T. Myocardial function was assessed with cine true fast imaging with steady-state precession sequences in 2 planes. Perfusion images were acquired with a T1-weighted gradient echo sequence. Late enhancement was performed using an inversion recovery-prepared fast gradient echo technique. Image quality was assessed using a 4-point score in consensus. Signal-noise ratio was measured. Results: For functional imaging, average score was 1.65 (SD, 0.6). For perfusion imaging, the value was 2.25 (SD, 0.68). For late enhancement, quality score was 2.6 (SD, 0.82). Average value of signal-noise ratio for functional, perfusion, and late enhancement imaging was 50.6 (SD, 16.4), 91.8 (SD, 52.8), and 33.2 (SD, 20.4), respectively. Conclusions: Open MRI with lower field strength can be used for functional imaging of the heart. For perfusion and viability imaging (late enhancement), higher field strength is needed. Open low-field cardiac MRI may provide a helpful alternative for obese or claustrophobic patients or patients who are difficult to move.