The Application of MR Diffusion-Weighted Imaging and MR Angiography in Transient ischemic Attacks
- VernacularTitle:磁共振弥散成像与血管成像在短暂性脑缺血发作中的应用
- Author:
Zhensong CHEN
;
Zhihua MENG
;
Zhifang WAN
;
Xinchun LI
- Publication Type:Journal Article
- Keywords:
brain;
cerebral ischemic attacks,transient;
MR imaging;
MR angiography
- From:
Journal of Practical Radiology
2001;0(10):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the value of diffusion-weighted MRI ,time of flight MR angiography (TOF-MRA) and 3D dynamic contrast enhanced MR angiography (3D DCE-MRA) in the diagnosis of transient ischemic attacks(TIA). Methods 176 consecutive patients with TIA were undergone MRI, including FLAIR,DWI,TOF-MRA and 3D CE-MRA sequences. Results Of 176 cases,48.9% of patients were found having hyperacute ischemic lesions by DWI sequence and 18.2% of lesions could be detected by T2WI.TOF-MRA showed arterial stenosis and occlusion in 76 cases(43.2%),false positive rate and excessive diagnosis were happened in 20 cases.3D CE-MRA of brain showed arterial stenosis and occlusion in 69 cases(39.2%).3 cases with aneurysm and 2 cases with arteriovenous malformation were detected by two methods.3D CE-MRA of neck showed arterial stenosis and occlusion in 38 cases(21.6%).Conclusion DWI and MRA are helpful in detecting the hyperacute ischemic lesion and evaluating the arterial lesions in the patients with TIA.
