Study on Neuroepithelial Tumor Grading and Pseudoprogression After Glioma Therapy Using Advanced Functional MRI Techniques

Contrast-enhanced MRI is the most common way for evaluating neuroepithelial tumor grading and monitoring for tumor recurrence,but the ability to predict tumor behavior remains very limited.In this study, the investigators will use multi-b-value diffusion-weighted imaging(DWI),three-dimensional arterial spin labeling(3D-ASL) and dynamic contrast-enhanced MRI imaging(DCE) to evaluate neuroepithelial tumor grading and monitor for tumor recurrence.