The value of T2 signal intensity in DTI to differentiate between brain tumor infiltration and pure vasogenic edema
10.3969/j.issn.1002-1671.2017.11.003
- VernacularTitle:T2信号强度在DTI鉴别脑肿瘤浸润与单纯血管性水肿中的价值
- Author:
Zhigang MIN
1
;
Ming ZHANG
;
Chen NIU
;
Long XU
;
Wenchao XIE
Author Information
1. 宜兴市人民医院放射科
- Keywords:
brain tumor;
edema;
infiltration;
diffusion tenor imaging
- From:
Journal of Practical Radiology
2017;33(11):1665-1667,1674
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the added value of T2-signal intensity (T2-SI) in discriminating tumor-infiltration from pure vasogenic edema with diffusion tensor imaging (DTI).Methods 55 patients with brain tumors [28 with high-grade glioma (HGG),13 with meningioma,and 14 with metastases] and concurrent peritumoral edema were scanned with DTI.The mean fractional anisotropy (FA),mean diffusivity (MD),longitudinal diffusivity (λ//) and radial diffusivity (λ⊥) in peritumoral edema of different tumors were measured and compared with each other.Results Only the mean FA showed significant difference between edema of HGG and meningioma (P＜0.05).When standardized T2-SI was used as the covariant,FA and λ⊥ showed significant differences among the tumor groups.The adjusted FA in edema of HGG was significantly lower than that of metastases (P＜0.05) and meningioma (P＜ 0.001).The adjusted λ⊥ in edema of HGG was significantly higher than that of meningioma (P＜0.05).Conclusion By controlling the effect of T2-SI,the value of DTI in distinguishing tumor-infiltration from pure vasogenic edema could be improved.
