In the abnormal group, solid components of tumor , necrotic tumor core, edematous brain and apparently normal white matter regions were determined on DTI compared with T2WI and contrast-enhanced T1WI.

• 所有患者术前均行MR增强扫描和MR扩散张量成像，对照T2WI与增强T1WI，在DTI上测量肿瘤实质区、肿瘤坏死区、水肿脑、正常白质区信号。