使用0.08特斯拉MD 800磁共振成像仪测量自旋晶格弛豫时间（T1）的可重复性。

Reproducibility of spin lattice relaxation time (T1) measurement using an 0.08 tesla MD 800 magnetic resonance imager.

作者信息

Richards M A, Gregory W M, Webb J A, Jewell S E, Reznek R H

出版信息

Br J Radiol. 1987 Mar;60(711):241-4. doi: 10.1259/0007-1285-60-711-241.

Abstract

The reproducibility of T1 measurements using an MD 800 magnetic resonance imager operating at 0.08 T (3.4 MHz) has been assessed by repeated imaging over a 15-week period of a phantom containing six copper-sulphate solutions of different dilutions. The standard pulse sequence of this scanner with an inversion time of 200 ms and a repetition time of 1 s was used. Reproducibility was excellent for the lower T1 range (less than 350 ms), but greater variability was observed at higher T1 values (greater than 490 ms). A linear relationship between T1 and temperature has been demonstrated and a method for standardising T1 values obtained at different temperatures is described.

摘要

使用一台运行在0.08 T（3.4 MHz）的MD 800磁共振成像仪，通过对含有六种不同稀释度硫酸铜溶液的体模进行为期15周的重复成像，评估了T1测量的可重复性。使用了该扫描仪的标准脉冲序列，反转时间为200 ms，重复时间为1 s。在较低的T1范围（小于350 ms）内，可重复性极佳，但在较高的T1值（大于490 ms）时观察到更大的变异性。已证明T1与温度之间存在线性关系，并描述了一种对在不同温度下获得的T1值进行标准化的方法。