Simultaneous fat saturation and magnetization transfer contrast imaging with steady-state incoherent sequences.
Simultaneous fat saturation and magnetization transfer contrast imaging with steady-state incoherent sequences.
复制标题
使用稳态不相干序列同时进行脂肪饱和度和磁化传递对比成像。
DOI：
10.1002/mrm.25475
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发表时间：
2015
影响因子：
3.3
通讯作者：
Noll,DouglasC
中科院分区：
文献类型：
--
作者：
Zhao,Feng;Nielsen,Jon-Fredrik;Swanson,ScottD;Fessler,JeffreyA;Noll,DouglasC
目的本工作结合了一维脂肪饱和度射频（RF）脉冲和稳态非相干（SSI）脉冲序列，例如，破坏梯度回波序列，以同时产生B 0不敏感脂肪抑制和磁化传递（MT）对比。该脉冲然后被称为“脂肪饱和和MT对比脉冲”。理论讨论了fat sat和MT对比脉冲的特点以及SSI序列与fat sat结合时的MT敏感性。此外，我们还介绍了一个自适应的RF破坏计划的SSI序列与脂肪sat。方法：通过仿真和体模实验来验证自适应射频扰流。脂肪抑制和MT效果显示在3 T幻影实验和体内实验，包括脑成像，软骨成像，和angiography.ResultsTo确保序列达到稳定状态，适应RF破坏是必需的脂肪SAT SSI序列。Fat sat和MT对比脉冲与场不均匀性鲁棒地工作，并且还产生MT contrasons.ConclusionSSI序列与Fat sat和MT对比脉冲和自适应RF破坏可以鲁棒地产生场不均匀性存在下的脂肪抑制和MT对比图像。Magn Reson Med 74：739-746，2015.© 2014 Wiley Periodicals，Inc.
PurposeThis work combines ann‐dimensional fat sat(uration) radiofrequency (RF) pulse with steady‐state incoherent (SSI) pulse sequences, e.g., spoiled gradient‐echo sequence, to simultaneously produceB0insensitive fat suppression and magnetization transfer (MT) contrast. This pulse is then referred to as “fat sat and MT contrast pulse.”TheoryWe discuss the features of the fat sat and MT contrast pulse and the MT sensitivities of the SSI sequences when combining with fat sat. Moreover, we also introduce an adapted RF spoiling scheme for SSI sequences with fat sat. Methods: Simulations and phantom experiments were conducted to demonstrate the adapted RF spoiling. Fat suppression and MT effects are shown in 3T phantom experiments and in vivo experiments, including brain imaging, cartilage imaging, and angiography.ResultsTo ensure that the sequence reaches steady state, the adapted RF spoiling is required for fat sat SSI sequences. Fat sat and MT contrast pulse works robustly with field inhomogeneity and also produces MT contrasts.ConclusionSSI sequences with fat sat and MT contrast pulse and adapted RF spoiling can robustly produce fat suppressed and MT contrast images in the presence of field inhomogeneity. Magn Reson Med 74:739–746, 2015. © 2014 Wiley Periodicals, Inc.