The differential diagnosis of hyperintensity lesions on high diffusion sensitive gradient diffusion-weighted imaging
- VernacularTitle:高扩散敏感系数扩散加权像异常高信号疾病的鉴别诊断
- Author:
Hongbin HAN
;
Jian WANG
;
Jingxia XIE
;
Jian LI
;
Ruping XIE
- Publication Type:Journal Article
- Keywords:
Multiple sclerosis;
Cerebral ischemia;
Magnetic resonance imaging;
Diffusion
- From:
Chinese Journal of Radiology
2001;0(09):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To summarized the diseases which were demonstrated as hyperintensity lesions on high diffusion sensitive gradien(high b value) diffusion weighted imaging(DWI) To investigate the differential diagnosis of the diseases and to discuss the corresponding biophysics mechanism Methods 90 cases were studied, which were clinically highly suspected of brain ischemic stroke onset and in which hyperintensity lesions were demonstrated on DWI The patients were divided to 2 groups according to the time between the onset and the MR examination:group A(1 5-6 0 h)with 13cases, group B(7 h to 8 d)with 77cases The appearances of the lesions on conventional MRI, ADC values and anistropy(CV )of the lesions were studied Results hyperintensity lesions on high b value DWI were demonstrated in following diseases: acute ischmia, hematoma, abcesses, mengioma, mutiple sclerosis(MS) The ADC value was decreased to(5 87?1 02)(10 -4 mm 2/s in superacute cerebral ischemia, while the ADC value increased to (8 08?1 15)?10 -4 mm 2/s in active MS The CV in cerebral ischemia lesions was higher than the control group( P
