Krestin G P, Friedmann G, Bunke J, Steinbrich W
Rofo. 1987 Aug;147(2):179-85. doi: 10.1055/s-2008-1048618.
In the FFE-sequence the new parameter "flip angle" introduces, besides the possibility of fast MR-imaging, an increased variability of external MR parameters. Experimental studies in healthy volunteers and patient examinations were carried out to establish the most useful parameter combinations giving reasonable contrasts. Variation of external parameters allows a manipulation of image contrasts: using small flip angles in combination with longer TE good T2-weighted images can be achieved; large flip angles with short TR and TE produce a sufficient T1-weighting. In this way the FFE sequence proves to be a valuable method for rapid assessment of pathologic lesions.
在快速场回波（FFE）序列中，新参数“翻转角”除了能实现快速磁共振成像外，还增加了外部磁共振参数的可变性。我们对健康志愿者进行了实验研究，并对患者进行了检查，以确定能产生合理对比度的最有用的参数组合。外部参数的变化可用于控制图像对比度：小翻转角与较长回波时间（TE）相结合可获得良好的T2加权图像；大翻转角与短重复时间（TR）和TE相结合可产生足够的T1加权。通过这种方式，FFE序列被证明是快速评估病理性病变的一种有价值的方法。
