摘要
目的探讨低场永磁型磁共振弥散加权成像(DWI)在早期脑梗死诊断中的应用价值。方法对临床高度怀疑脑梗死的77例患者进行DWI和常规MRI扫描,并比较DWI与常规MRI对于早期脑梗死的敏感性;分析不同时期病灶信号强度及大小变化情况,总结病灶演变规律。结果①DWI发现梗塞病灶较常规MRI更为敏感,对超急性期的脑梗死灶的敏感度为100%;②急性期梗塞灶在DWI序列表现为异常信号,信号强度随着b值的增加而增强,急性期、亚急性、稳定期梗塞灶在DWI中异常信号强度由低向高变化的趋势更加明显。结论低场永磁型磁共振弥散加权成像不仅可行,而且在早期诊断、早期治疗超急性期的脑梗死中有着非常重要的应用价值。
Objective To evaluate the value of diffusion weighted imaging （DWI） in acute cerebral infarction using permanent type MR scanner. Methods DWI and conventional MRI sequences were done in 77 patients suspected with cerebral infarction. The sensitivity of DWI and conventional MRI was comparatively evaluated on lesion signal intensity and size. The characteristics and orderliness of lesions were studied. Results ① DWI has higher sensitivity than conventional MRI. ② The higher b value was applied in the imaging, the higher signal intensity of acute cerebral infarction was revealed. The lesions were easier to identify on DWI images than on conventional MRI. Conclusion DWI of permanent type MR imager is a feasible imaging modality, which is valuable in early diagnosis and management of acute cerebral infarction.
出处
《影像诊断与介入放射学》
2006年第3期102-104,共3页
Diagnostic Imaging & Interventional Radiology
关键词
磁共振成像
回波平面成像
脑缺血
评价研究
Magnetic Resonance Imaging
Echo Planner Imaging
cerebral infarction
evaluation studies
