T1 measurements with clinical MR units.
T1 measurements with clinical MR units.
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使用临床 MR 设备进行 T1 测量。
DOI：
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发表时间：
1995
影响因子：
2.2
通讯作者：
K. Sakamoto
中科院分区：
文献类型：
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作者：
H. Tamura;I. Yanagawa;T. Hikichi;K. Matsumoto;S. Takahashi;K. Sakamoto
为了提高常规磁共振成像（MRI）中质子自旋-晶格弛豫时间（T1）测量的准确性和可行性，使用1.5T临床MR装置对聚乙烯醇凝胶和钆二亚乙基三胺五乙酸溶液的体模进行成像，并通过将几种模型拟合到观察到的信号强度来计算T1。当应用反转恢复序列时，我们能够通过考虑反转脉冲的不完美性以高精度测量T1。使用Turbo-fast低角度拍摄序列，我们能够在短时间内获得T1，但低信噪比限制了精度。SE序列的信号强度易受90度RF脉冲有效翻转角的影响，不适用于T1测量。
To improve accuracy and feasibility of the proton spin-lattice relaxation time (T1) measurements in routine Magnetic Resonance Imaging (MRI), a phantom with polyvinyl alcohol gels and gadrinium diethylene triamine pentaacetic acid solutions was imaged with 1.5T clinical MR units and T1s were calculated by fitting several models to the observed signal intensities. When an inversion-recovery sequence was applied, we were able to measure T1 with a high degree of precision by taking into account the imperfection of the inversion pulse. With a Turbo-fast low angle shot sequence, we were able to obtain T1 in a short time, but low signal-to-noise ratio limited the precision. Signal intensity with SE sequence was susceptible to variation with the effective flip angle of 90 degrees RF pulse and not suited for T1 measurement.
二维核磁共振成像中的自旋晶格弛豫时间测量：平面选择和脉冲序列的校正。
影响因子：
1.3
作者：
Rosen,BR;Pykett,IL;Brady,TJ
通讯作者：
Brady,TJ