磁共振成象与X线—CT比较,有许多突出的优点。例如诊断信息量大,对同一断层可以获取密度图象及T_1、T_2不同加权程度的图象,可以在任意方向取断层,软组织图象反差大等。在临床检查中,实现这些优点的方法便是根据诊断的需要灵活地设置各种脉冲序列。经常应用的脉冲序列有三种。 Magnetic resonance imaging and X-CT comparison, there are many outstanding advantages. For example, a large amount of diagnostic information can be obtained for the same fault density images and T_1, T_2 different degrees of weight of the image, you can take the fault in any direction, soft tissue image contrast and so on. In clinical examinations, the way to achieve these benefits is the flexibility to set up various pulse sequences for diagnostic purposes. There are three commonly used pulse sequences.