【摘 要】
：
目的:评价在乳腺磁共振扩散加权成像(DWI)中应用全自动校准部分并行采集(GRAPPA)技术对改善图像质量及乳腺组织表观扩散系数(ADC)值测量的影响.方法:分别对28例女性乳腺MR受
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目的:评价在乳腺磁共振扩散加权成像(DWI)中应用全自动校准部分并行采集(GRAPPA)技术对改善图像质量及乳腺组织表观扩散系数(ADC)值测量的影响.方法:分别对28例女性乳腺MR受检者进行平面回波(EPI)序列的常规DWI和GRAPPA-DWI检查.常规DWI检查时扩散梯度因子(b)值取800 s/mm2,GRAPPA-DWI检查时b值分别取800、1000 s/mm2.比较不同参数条件下的图像质量分级、信噪比(SNR)及乳腺组织ADC值,并进行统计学分析.结果:在相同b值(b=800 s/mm2)条件下,GRAPPA-DWI组图像质量明显优于常规DWI组,乳腺组织的SNR高于常规DWI组,两组差异均有显著性意义(P0.05).在GRAPPA-DWI组中,b值为800 s/mm2组图像质量略优于b值为1000 s/mm2组,但二者差异无显著性意义(P>0.05),而b值为800 s/mm2组乳腺组织的SNR高于b值为1000 s/mm2组,两组差异有显著性意义(P
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