Contrast, spatial frequency, presentation time, moving velocity and phase reversal frequency of each grating are controlled independently.
每组光栅的对比度、空间频率、显示时间，移动速度和反相频率能单独控制。
Portal velocity and portal flow with phase contrast (PC) were measured.
相位对比法(PC)测门静脉血流速度、每分钟流量。
Results it was found that nerve conduction velocity, regenerated myelinated nerve fiber cross section area and number of nerve fiber were superior to those of the contrast.
结果实验组神经传导速度、再生的有髓神经纤维横截面积、数目均优于对照组。
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