高低信号选择器 high low signal selector ; [电子] low or high selector ; high-low signal selector ; low signal selector
高精度低频信号发生器 high precision LF signal generator
单变量分析发现脑微出血的出现和数量，低教育程度及白质高信号的程度与简易精神状况检查低分值有显著相关性。
Univariate analysis showed presence and number of MBs, short duration of education, and severe white matter hyperintensities as significantly associated with subnormal scores.
虽然由于缺少质子，两个序列都显示为低信号。高信号可以用钙盐颗粒沉积于脑内所致的表面弛豫效应来解释。
Although there is usually low signal on both sequences due to a paucity of protons, high signal can be explained by a surface relaxation effect by the calcium salt particle precipitated in the brain.
结果： 在T1像上，所有的应力性骨折与转移瘤都表现为信号减低，而在T2加权像上则表现为低或高信号。
Results. All the insufficiency fractures and metastasis at the sacrum revealed low signal intensity on T1-weighted MRI; low or high signal intensity was revealed on T2-weighted MRI.
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