T1 WI BLADE Dark Fluid 序列在头颅增强扫描中的应用价值  

The value of contrast-enhanced T1 WI BLADE Dark Fluid sequence in the brain MR imaging

作　　者：张海平[1,2] 敖国昆[2] 李利佳[2] 刘杰爱[2] 石清磊[2] 李帅[3] 

机构地区：[1]河北北方学院,河北张家口075000 [2]中国人民解放军第309医院放射科 [3]西门子中国有限公司磁共振产品事业部

出　　处：《实用放射学杂志》2015年第8期1358-1361,共4页Journal of Practical Radiology

摘　　要：目的：探讨 MR T1 WI BLADE Dark Fluid 增强序列在减少头颅运动伪影方面的应用价值。方法纳入颅内病变患者40例（颅内病变者30例）,由2名放射科医师对 T1 WI BLADE Dark Fluid 增强序列和 T1 WI Dark Fluid 增强序列扫描所得图像分析,按照病变运动伪影程度行0-Ⅲ分级,并运用 Wilcoxon 符号秩检验比较分析。2名医师分别测量计算2种序列客观指标,灰白质对比度（CNRgw ）、病变对比噪声比（CNRle ）及脑白质信号噪声比（SNRwm ）,取其均值为最终结果,采用配对 t 检验比较分析。结果 T1 WI BLADE Dark Fluid 序列头部运动伪影0、Ⅰ、Ⅱ、Ⅲ级病例数分别为21、9、0、0例,T1 WI Dark Fluid 序列分别为8、11、6、5例,T1 WI BLADE Dark Fluid 序列在减少运动伪影方面优于 T1 WI Dark Fluid 序列（Z =-5.130,P =0.000）。T1 WI BLADE Dark Fluid 序列 CNRgw （30.37±10.96）与 CNRle （87.36±45.32）高于 T1 WI Dark Fluid 的 CNRgw （24.48±10.55）与 CNRle （60.46±25.22）,差异具有统计学意义（P =0.000,P =0.009）,2种序列 SNRwm 分别为84.12±20.08、79.71±25.37,差异无统计学意义（P =0.169）。结论T1 WI BLADE Dark Fluid 序列可明显减少头颅检查过程中运动产生的伪影,在头颅增强 T1 WI 检查中具有较大的应用价值。Objective To study the diagnostic value of contrast-enhanced T1 WI BLADE Dark Fluid in head MR examination. Methods Forty patients with suspected intracranial lesions were enrolled（thirty patients with intracranial lesions）.The images of contrast-enhanced T1 WI BLADE Dark Fluid and contrast-enhanced T1 WI Dark Fluid were analyzed by two radiologists and classified from 0 to III degrees by motion artifacts of lesions.The results were analyzed using the Wilcoxon signed-ranks test.The quantitative parameters including the contrast to noise ratio between gray and white matter （CNRgw ）,the contrast to noise ratio between white matter and lesion （CNRle ）and the signal to noise ratio of white matter（SNRwm ）were measured and calculated by the same two radi-ologists.The mean values of the quantitative parameters were compared using the Paired t-test.Results The grading values were 21,9,0 and 0 case in 0,Ⅰ,Ⅱ and Ⅲ grades scanned by T1 WI BLADE Dark Fluid and 8,1 1,6 and 5 cases in group scanned by T1 WI Dark Fluid and the difference between them was significant statistical difference（Z =-5.130,P =0.000）;The CNRgw （30.37 ±10.96 ）and CNRle （87.36±45.32）of T1 WI BLADE Dark Fluid were superior to the CNRgw （24.48±10.55）and CNRle （60.46 ±25.22）of T1 WI Dark Fluid,with significant statistical difference （P=0.000,P=0.009）.The mean values of SNRwm of the two sequences were 84.12±20.08, 79.71±25.37,with no significant statistical difference （P =0.1 69）.Conclusion Contrast-enhanced T1 WI BLADE Dark Fluid can significantly weaken the motion artifacts.It has great value in contrast-enhanced T1 WI head MR examination.

关 键 词：头颅 BLADE 运动伪影 磁共振成像 

分 类 号：R816.1[医药卫生—放射医学]