扩散加权磁共振波谱采集策略优化：门控及循环模式影响

文玉林, 李改英, 武玉朋, 李建奇

Optimization of DW-MRS Acquisition Protocol: The Impact of Gating and Cycling Modes

WEN Yulin, LI Gaiying, WU Yupeng, LI Jianqi

图5 采用b值内循环和外循环模式时三种代谢物各ADC的变异系数分布情况. (a) tCho；(b) tCr；(c) tNAA. LR、AP和HF分别表示扩散梯度施加在受试者左右、前后方向和头脚方向时ADC的变异系数，mean表示在三个正交方向ADC的平均值的变异系数. 蓝色表示b值内循环；橙色表示b值外循环. * P <0.05；** P < 0.01

Fig. 5 The distribution of the coefficient of variation of the apparent diffusion coefficient (ADC) for three metabolites when using the internal and external b-value cycling modes. (a) tCho; (b) tCr; (c) tNAA. The LR, AP, and HF represent the coefficient of variation of the ADC when the diffusion gradient is applied in the left-right, anterior-posterior, and head-foot directions, respectively, while "mean" denotes the coefficient of variation of the averaged ADC across the three orthogonal directions. Blue indicates the internal b-value cycling mode; orange represents the external b-value cycling mode. * P < 0.05; ** P < 0.01