目的探讨高场磁共振扩散张量 成像(DTI)技术在恶性脑肿瘤中的应用价 值。方法 对5例恶性脑膜瘤、15例脑胶 质瘤、30例转移瘤行常规头颅平扫及增 强，三维成像(AX3DFSPGR)、扩散张量成 像(DTI)扫描，利用表观弥散系数(ADC) 值、各向异性分数(FA)值进行后处理重 建，测量肿瘤实质区、水肿区和瘤周白 质区的白质纤维束走行进行综合分析。 结果 恶性脑肿瘤周水肿区、瘤周白质纤 维束均发生破坏、中断，肿瘤周围白质 纤维束的破坏发生率与肿瘤的恶性程度 成正比。结论 扩散张量成像(DTI)技术 在鉴别颅内恶性肿瘤方面有重要应用价 值。

Objective To investigate the value of high field magnetic resonance diffusion tensor imaging (DTI) technique in malignant brain tumors. Methods Five cases of malignant meningiomas, 15 cases of gliomas and 30 cases of metastases were scanned by AX3DFSPGR and diffusion tensor imaging (DTI). The apparent diffusion coefficient (ADC) Value and anisotropy fraction (FA) were post-processed and reconstructed. The white matter fiber bundles in the tumor parenchyma area, edema area and peritumor white matter area were measured and analyzed. Results Malignant brain tumor edema area, peritumoral white matter fiber bundles were destroyed, interrupted, the incidence of white matter damage around the tumor and the tumor is proportional to the degree of malignancy. Conclusion Diffusion tensor imaging (DTI) has important application value in differentiating intracranial malignant tumors.