目的探讨磁共振螺旋 桨 技 术 ( p e r i o d i c a l l y r o t a t e d overlapping parallel lines enhanced reconstruction，PROPELLER)在改善固定 义齿脑梗塞患者MR图像伪影中的作用。方 法 对2013年1月至2015年1月来我科行MRI 检查装有固定义齿的患者81例，分别采用 PROPELLER DWI技术和常规FSE DWI序列进 行头颅MRI扫描，对采集到的MRI图像进行 观察。结果 PROPELLER DWI检出脑梗塞病 灶78例，未检出病灶3例分别是额叶1例， 颞叶2例；FSE DWI检出脑梗塞病人20例， 未检出病灶61例，额叶、颞叶、小脑及脑 干出现伪影分别为19例、39例、1例、2 例。结论 PROPELLER技术能有效消除磁敏 感伪影，改善固定义齿脑梗塞患者的MR图 像质量，增加脑梗塞病灶的检出率，对改 善MR图像质量有非常好的作用。

Objective To evaluate the value of periodically rotated overlapping parallel lines enhanced reconstruction dwi technique for artifact reduction in MRI. Methods The 81patients of clinical suspicion of cerebral infarction from 2013 to 2015 with denture underwent MRI examination.To take the PROPELLERdwi and FSE dwi respectively. Results PROPELLER DWI in the detection of cerebral infarction lesion in 78 cases, frontal lobe, temporal lobe artifacts, respectively 1 cases, 2 cases; FSE DWI was detected in 20 patients with cerebral infarction, frontal lobe, temporal lobe, cerebellum and brainstem artifacts were 19 cases, 39 cases, 1 cases, 2 cases. Conclusion PROPELLER DWI for detection of cerebral infarction lesions have a good advantage, at the same time for the case with denture is effective, can eliminate the magnetic susceptibility artifacts, has a very active role in improving the image quality.