Tiling R, Fink U, Deimling M, Bauer W M, Yousry T, Krauss B
Radiologische Klinik, Ludwig-Maximilians Universität München.
Rofo. 1988 Sep;149(3):303-9. doi: 10.1055/s-2008-1048347.
Studies designed to optimise image contrasts of gradient echo sequences showed, that especially repetition times between 250 and 500 ms in combination with adequate echo times and flip angles provide new image contrasts. The clinical purpose of gradient echo sequences with longer TR was systematically evaluated in 450 patients. A major advantage of GE sequences was the low signal intensity of fat and bone tissue. On the other hand different pathologic changes showed a high signal intensity in comparison to T2 weighted spin echo sequences as well. With the possibility of multiple slices GE sequences were of outstanding diagnostic value especially in MR of soft tissue and of the musculoskeletal system. T2 weighted SE sequences provided no additional informations and could therefore be omitted in a great number of examinations.
旨在优化梯度回波序列图像对比度的研究表明，尤其是250至500毫秒之间的重复时间，结合适当的回波时间和翻转角度，可提供新的图像对比度。对450例患者系统评估了具有较长重复时间（TR）的梯度回波序列的临床用途。梯度回波序列的一个主要优点是脂肪和骨组织的信号强度低。另一方面，与T2加权自旋回波序列相比，不同的病理变化也显示出高信号强度。由于可以进行多层扫描，梯度回波序列在软组织和肌肉骨骼系统的磁共振成像中具有突出的诊断价值。T2加权自旋回波序列无法提供额外信息，因此在大量检查中可以省略。
