Role of diffusion weighted imaging in distinguishing between brain abscess and necrotic or cystic tumor
- VernacularTitle:弥散加权图像在鉴别脑脓肿与坏死、囊变脑肿瘤中的作用
- Author:
Lin AI
;
Jianping DAI
;
Peiyi GAO
- Publication Type:Journal Article
- Keywords:
Magnetic resonance imaging;
Brain abscess;
Brain neoplasm
- From:
Chinese Journal of Radiology
2001;0(09):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the role of diffusion weighted (DW) echo planar MRI in differentiating between brain abscesses and necrotic or cystic tumors. Methods Five patients with brain abscesses, 7 with malignant gliomas, and 1 with brain metastasis were consecutively examined using conventional MRI and diffusion weighted imaging (DWI). The apparent diffusion coefficient (ADC) of ROI was measured with two different b values (0 and 1 000 s/mm 2 or 0 and 1 200 s/mm 2). The results were analyzed using two independent samples test. Results On diffusion weighted imaging, brain abscesses showed marked hyperintensity in all 5 patients, whereas necrotic or cystic brain tumors demonstrated hypointensity in all 8 patients. ADC mean values of brain abscesses, which was 0.43?10 -3 cm 2/s, were lower than those of necrotic or cystic portion of brain tumors ( T =15.00, P
