Arrivé L, Guinet C, Buy J N, Malbec L, Vadrot D, Laval-Jeantet M
J Radiol. 1985 Dec;66(12):763-9.
Multiparametric choice is needed in Magnetic Resonance Imaging (MRI). In addition to matrix definition, section thickness, accumulation number, the repetition time TR, the echo time TE (for the spin echo technique) and the plane selection are of great importance. In pelvic examination, information supplied by T1 and by T2 weighted images is complementary. So, comparison between the three dimensional sections is of great interest. Although long acquisition times could, in theory, provide better images and therefore more clinical information, the patient comfort must be considered in choosing a reasonable examination time. We believe that it is possible, without great loss of information, not to make inversion recovery sequences. Using a 0.5 T superconducting magnet, sequences were done with TR of 1,200 ms for T2 weighted images and two echoes with TE of 40 or 50 ms. Twice repeated sequences (for averaging purpose) and 256(2) matrix (with a 42 cm field diameter) seem to be well adapted to MRI clinical applications.
磁共振成像（MRI）需要进行多参数选择。除了矩阵定义、层厚、采集次数外，重复时间TR、回波时间TE（用于自旋回波技术）以及平面选择也非常重要。在盆腔检查中，T1加权图像和T2加权图像提供的信息是互补的。因此，三维切片之间的比较很有意义。虽然理论上较长的采集时间可以提供更好的图像，从而获得更多的临床信息，但在选择合理的检查时间时必须考虑患者的舒适度。我们认为，在不损失大量信息的情况下，可以不进行反转恢复序列。使用0.5T超导磁体，T2加权图像的TR为1200ms，有两个TE为40或50ms的回波。两次重复序列（用于平均）和256(2)矩阵（场直径为42cm）似乎非常适合MRI临床应用。
