Rs-EPI弥散加权成像在颅内占位性病变的临床应用研究

发布时间：2018-04-29 22:34

本文选题：DWI + MRI　；参考：《四川大学学报(医学版)》2017年03期

【摘要】：目的与常规单次激发平面回波(Ss-EPI)弥散加权成像(DWI)比较,探讨读出方向分段采样平面回波(Rs-EPI)DWI序列在颅内占位性病变的临床应用价值。方法连续纳入临床诊断为颅内占位性病变的患者21例,采用SEIMENS Skyra 3.0T MRI及20通道的头颈联合线圈,行常规Ss-EPI DWI和Rs-EPI DWI序列扫描,由2名高年资影像诊断医师从对比噪声比(CNR)、信噪比(SNR)、伪影、图像整体质量及病变显示等方面进行评价分析。两种序列的图像质量比较采用非参数Wilcoxon符号秩和检验,2名阅片者之间一致性检测采用Kappa检验及组内相关系数(ICC)分析。结果 21例患者均成功完成两组序列扫描。Ss-EPI DWI序列的SNR、CNR(130.46±49.10,33.22±18.86)高于Rs-EPI DWI序列(71.58±30.43,17.92±18.72)(P均0.05)。鼻窦旁、乳突气房旁、额窦旁Rs-EPI DWI畸变伪影(3.67±0.48,3.57±0.50,3.90±0.30)小于Ss-EPI DWI(2.10±0.10,2.33±0.58,2.80±0.60)(P均0.05);Rs-EPI DWI病变显示优于Ss-EPI DWI(3.95±0.22vs.3.19±0.60,P0.05);RsEPI DWI图像整体质量优于Ss-EPI DWI(3.86±0.86vs.2.71±0.46,P0.05)。Rs-EPI DWI图像变形小于SsEPI DWI(0.016±0.021vs.0.037±0.069,P=0.00)。2名阅片者对两种序列的主观及客观评价一致性好[0.74≤Kappa值或ICC≤0.92]。结论 Rs-EPI DWI序列提高颅内占位性病变显示情况,降低了图像畸变伪影,可获得高分辨、高图像质量的弥散加权图像。
[Abstract]:Objective to compare with the conventional single excitation plane echo (Ss-EPI) diffusion-weighted imaging (DWI), the clinical value of the read direction piecewise sampling plane echo (Rs-EPI) DWI sequence in the intracranial space occupying lesions was discussed. Methods 21 patients with intracranial space occupying lesions were consecutively diagnosed with SEIMENS Skyra 3.0T MRI and 20 channels of the head and neck. Combined coils, routine Ss-EPI DWI and Rs-EPI DWI sequence scanning, 2 senior image diagnostics were evaluated from contrast to noise ratio (CNR), signal to noise ratio (SNR), artifact, image overall quality and lesion display. The image quality of the two sequences was compared with the non parametric Wilcoxon symbol rank sum test, and the agreement between 2 film readers. Kappa test and intra group correlation coefficient (ICC) analysis were used. Results all 21 patients successfully completed the SNR of the sequence of two sequences, CNR (130.46 + 49.10,33.22 + 18.86) were higher than Rs-EPI DWI sequence (71.58 + 30.43,17.92 + 18.72) (P all 0.05). Paranasal paranasal, papillomastoid gas room, paranasal sinus paranoid aberration artifacts (3.67 + 0.50,3.90 + 0.30) was less than Ss-EPI DWI (2.10 + 0.10,2.33 + 0.58,2.80 + 0.60) (P 0.05), and Rs-EPI DWI lesions showed better than Ss-EPI DWI (3.95 + 0.60, P0.05). The subjective and objective evaluation of the two sequences was consistent with the two sequences, such as good consistency, good [0.74 < Kappa value or ICC < 0.92]. conclusion Rs-EPI DWI sequence to improve the display of intracranial space occupying lesions, reduce the image distortion artifact, and obtain high resolution and high image quality of the diffusion weighted image.

【作者单位】：四川大学华西医院放射科;
【基金】：国家自然科学基金面上项目(No.81371528) 四川省科技厅科技支撑计划项目(No.2013SZ0047)资助
【分类号】：R445.2;R739.41

【相似文献】