RESOLVE技术减少磁敏感伪影的探讨

Discussion on RESOLVE Technology to Reduce Magnetic Sensitive Artifacts

目的探讨应用高清弥散多次激发弥散加权成像(Readout Segmentation of Long Variable Echo-trains,RESOLVE序列在颅脑磁共振成像(Magnetic Resonance Imaging,MRI)扫描时对减轻金属异物所致磁敏感伪影的影响的临床价值。方法回顾性分析2018年6月至2019年9月在我所行颅脑MRI常规扫描有磁敏感伪影的患者进行单次激发平面回波成像(Single Shot Echo Planar Imaging,SS-EPI)序列和RESOLVE序列扫描,并对图像采用SPSS 26.0数据分析软件进行统计学分析。结果对比分析30例磁敏感伪影患者SS-EPI序列图像和RESOLVE序列图像,应用RESOLVE技术扫描患者的图像较使用普通弥散加权成像(Diffusion Weighted Imaging,DWI)技术扫描的患者的伪影减轻率为30/30(100%)。RESOLVE序列可以减少图像畸变伪影、磁敏感伪影、提高图像对病灶显示的清晰度及图像的整体质量(P<0.001)。结论RESOLVE DWI序列能够很好地改善由金属假牙产生的磁敏感伪影,清晰显示病灶。

Objective To explore the clinical value of applying readout segmentation of long variable echo-trains(RESOLVE)sequence in the cranial magnetic resonance imaging(MRI)scanning to reduce the impact of magnetic sensitivity art ifacts caused by metal foreign bodies.Methods We retrospectively analyzed the sequence and sequence of single shot echo planar imaging(SS-EPI)in patients with magnetic sensitivity artifacts in our cranial MR routine scan from June 2018 to September 2019.The RESOLVE sequence was scanned,and the images were statistically analyzed using SPSS 26.0 data analysis software.Results The SS-EPI sequence images and RESOLVE sequence images of 30 patients with magnetically sensitive artifacts were compared and analyzed.The reduction rate of artifacts in patients scanned with RESOLVE technology was 30/30(100%)compared with patients scanned with ordinary diffusion weighted imaging(DWI)technology.The RESOLVE sequence can reduce image distortion artifacts,magnetic sensitivity artifacts,and improve the clarity of the image to the lesion and the overall quality of the image(P<0.001).Conclusion The RESOLVE DWI sequence can improve the magnetic sensitivity artifacts produced by metal dentures and clearly show the lesions.