Rapid fat suppression in MRI of the breast with short binomial pulses.
Rapid fat suppression in MRI of the breast with short binomial pulses.
复制标题
使用短二项式脉冲在乳房 MRI 中快速抑制脂肪。
DOI：
10.1002/jmri.20737
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Morrell,GlenR
中科院分区：
文献类型：
--
作者：
Morrell,GlenR
PurposeTo开发一种更快的方法，脂肪抑制用于在动态对比增强MRI的乳房。材料和MethodsA方法的快速脂肪抑制，提出了使用空间非选择性快速二项式脉冲。与传统的二项式频率选择性脉冲相比，这些短脉冲没有脉冲间延迟，允许非常快速的光谱选择性excitation.ResultsEffective水激励和脂肪抑制在乳腺MRI中实现在3.0特斯拉的总激励时间低至160 μsec，这是几倍短于目前使用的脂肪抑制技术的激励时间。快速的脂肪抑制是以增加比吸收率（SAR）和轻度降低抑制质量为代价的。可以灵活权衡短成像时间与SAR，以优化脂肪抑制乳腺MRI的成像速度。结论快速二项脉冲可用于动态对比增强乳腺MRI，其激发时间明显短于当前使用的脂肪抑制脉冲。更短的激发时间允许更快速的成像，允许更大的时间和空间分辨率用于表征乳腺病变。J.磁共振Imaging 2006.© 2006 Wiley利斯公司
PurposeTo develop a faster method of fat suppression for use in dynamic contrast enhanced MRI of the breast.Materials and MethodsA method of fast fat suppression is presented using spatially nonselective rapid binomial pulses. In contrast to conventional binomial frequency‐selective pulses, these short pulses are applied without interpulse delay, allowing for very rapid spectrally selective excitation.ResultsEffective water excitation and fat suppression were achieved in breast MRI at 3.0 Tesla with total excitation time as low as 160 μsec, which is several times shorter than the excitation time of currently used fat suppression techniques. Rapid fat suppression comes at the expense of increased specific absorption rate (SAR) and mildly degraded quality of suppression. A flexible tradeoff of short imaging time vs. SAR can be made to optimize imaging speed for fat‐suppressed breast MRI.ConclusionRapid binomial pulses can be used for dynamic contrast enhanced breast MRI with excitation times significantly shorter than currently used fat suppression pulses. Shorter excitation time allows more rapid imaging, allowing greater temporal and spatial resolution for characterization of breast lesions. J. Magn. Reson. Imaging 2006. © 2006 Wiley‐Liss, Inc.