PRACTICAL IMPLEMENTATION AND OPTIMIZATION OF ONE-SHOT T1 IMAGING
PRACTICAL IMPLEMENTATION AND OPTIMIZATION OF ONE-SHOT T1 IMAGING
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DOI：
10.1002/mrm.1910220249
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发表时间：
1991-12-01
影响因子：
3.3
通讯作者：
HENKELMAN, RM
中科院分区：
文献类型：
--
作者：
KAY, I;HENKELMAN, RM
纵向松弛时间（T1）可以在成像环境中使用基于脉冲序列的“一次射击”方法快速测量。instrument . 41,250 1970)。该序列的速度明显快于重复反演和重复饱和恢复方法。该方法使用180°反转脉冲，随后是多个小角α脉冲，在其恢复过程中采样纵向磁化。讨论了反转脉冲、针尖角度和时间间隔的选择，以获得最佳的临床应用。我们可以在大约10分钟内以256 × 256的分辨率生成29张采样全lt1恢复曲线的图像。根据该数据，t1图像的计算精度为10%。©1991学术出版社，Inc。
Longitudinal relaxation times (T1) can be measured rapidly in an imaging context using a “one‐shot” method based on the pulse sequence originally proposed by D. C. Look and D. R. Locker (Rev. Sci. Instrum.41, 250 1970). This sequence is significantly faster than either repeated inversion recovery or repeated saturation recovery methods. The method uses a 180° inversion pulse followed by multiple small‐angle α pulses that sample the longitudinal magnetization during its recovery. Choices of inversion pulse, tip angle, and time intervals are discussed for optimal clinical use. We can produce 29 images sampling the fullT1recovery curve with a 256 × 256 resolution in about 10 min. From this data,T1images can be calculated with a precision of 10%. © 1991 Academic Press, Inc.