摘要
目的比较PROPELLER FSE和EPI两种扩散加权威像序列,探讨PROPELLER技术在诊断超急性脑梗塞中的应用价值。方法选取67例临床疑诊急性脑梗塞的患者分别行常规TIWI,T2WI,T2WI FLAIR序列检查和PROPELLER FSE扩散加权成像、EPI扩散加权成像,比较两种不同的弥散加权成像序列的图像质量,病灶检出率和对病变的显示程度。结果两个序列均可分辩出所有非颅底区域梗塞灶,对12个颅底病灶PROPELLER FSE DWI序列检出率达100%,而EPI DWI序列可检出率达58.3%。结论PROPELLER FSE扩散加权成像能提高图像信噪比,并有效消除颅底磁化率伪影,改善图像质量,提高颅底病变的检出率。
Objective To evaluate the diagnostic value for acute cerebral infarction by using PROPELLER FSE DWI Methods Compares PROPELLER FSE DWI with EPI DWI for image quality and visualization of acute cerebral infarction. 67 cases （36 males, 31 females, mean age, 57.32 ± 19.64 years ） who are suspected of having acute cerebral infarction （symptom duration, 2.9 ± 2.5 days） underwent PROPELLER and echoplanar diffusion-weighted MR imaging （ h = 1,000 sec/mm^2） as well as T1WI, T2WI, T2WI- FLAIR. Three radiologists compared unlabeled images for presence of artifacts, visualization of infarction, and their preference of images. The signal - to - noise ratio of lesions near the skull base or the frontal sinuses were assessed by using the statistic and the t test, respectively. Results Of the 67 patients ,46 acute infarction lesions were found. 12 focused in the part of the brain that located near the skull base or the frontal sinuses, all were clearly demonstrated at PROPELLER MR imaging , 7 were demonstrated clearly at EPI DWI（58.3% ） Conclusion PROPELLER FSE DWI imaging offers better image quality and detection of acute cerebral infarction than does echo - planar MR imaging , in the part of the brain located near the skull base or the frontal sinuses.
出处
《医疗设备信息》
2007年第5期92-94,91,共4页
Information of Medical Equipment
基金
福建省自然科学基金计划(2006J0371)
关键词
急性脑梗塞
磁共振扩散加权成像
伪影
螺旋桨
acute cerebral infarction
magnetic resonance imaging
diffusion
artifact
PROPELLER
