K空间填充策略对基于FLASH序列的APT图像脂肪伪影的影响

逄奇凡, 王志超, 武玉朋, 李建奇

The Impact of K-Space Filling Strategy on Fat Artifacts in APT Imaging Based on FLASH Sequence

PANG Qifan, WANG Zhichao, WU Yupeng, LI Jianqi

图2 五种不同K空间填充策略下饱和脂肪信号在采集过程的幅度调制曲线（第一行）及其对应的图像空间点扩散函数（第二行）. (a, f)单次饱和与顺序采集；(b, g)单次饱和与中心优先采集；(c, h)分段饱和与顺序采集；(d, i)分段饱和与中心优先采集；(e, j)分段饱和与重排中心优先采集

Fig. 2 Amplitude modulation curves after fat signal saturation for five different K-space filling strategies (the first row) and the corresponding point spread functions in image space (the second row). (a, f) single saturation with sequential acquisition; (b, g) single saturation with center-out acquisition; (c, h) multiple saturations with sequential acquisition; (d, i) multiple saturations with center-out acquisition; (e, j) multiple saturations with reordered center-out acquisition