Cardiovascular magnetic resonance at 3.0 T: current state of the art.
Cardiovascular magnetic resonance at 3.0 T: current state of the art.
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DOI：
10.1186/1532-429x-12-55
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发表时间：
2010-10-07
期刊：
影响因子：
--
通讯作者：
Pettigrew RI
中科院分区：
文献类型：
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作者：
Oshinski JN;Delfino JG;Sharma P;Gharib AM;Pettigrew RI
在3.0 Telsa场强下进行心血管磁共振（CMR）研究有很多优点，包括体磁化强度增加，非共振自旋频率分离增加，许多组织T1增加。然而，在3.0T下常规进行CMR存在重大挑战，包括主磁场均匀性降低、射频功率沉积增加以及基于磁化率的伪影增加。在这篇综述中，我们概述了在高场成像时发生的潜在物理效应，研究了这些效应对CMR应用的实际结果，并研究了用于补偿这些效应的方法。具体来说，我们将回顾电影成像、MR冠状动脉造影、心肌灌注成像、晚期钆增强和血管壁成像。
There are advantages to conducting cardiovascular magnetic resonance (CMR) studies at a field strength of 3.0 Telsa, including the increase in bulk magnetization, the increase in frequency separation of off-resonance spins, and the increase in T1 of many tissues. However, there are significant challenges to routinely performing CMR at 3.0T, including the reduction in main magnetic field homogeneity, the increase in RF power deposition, and the increase in susceptibility-based artifacts. In this review, we outline the underlying physical effects that occur when imaging at higher fields, examine the practical results these effects have on the CMR applications, and examine methods used to compensate for these effects. Specifically, we will review cine imaging, MR coronary angiography, myocardial perfusion imaging, late gadolinium enhancement, and vascular wall imaging.