Xiang Liu1, Wei Tian2, Sven Ekholm2
1Department of Imaging Sciences, University of Rochester Medical Center, Rochester, NY, United States; 2Department of Imaging Sciences, University of Rochester Medical Cente, Rochester, NY, United States
Although it is important, it is difficult to preoperatively differentiate between intracranial dural based metastases and meningiomas, on conventional MR images. We retrospectively analyzed diffusion tensor imaging in 21 patients with meningiomas and 18 cases of dural metastases. The FA and maximal FA values of meningiomas were significantly higher than for intracranial dural based metastases; but there was no significant difference in mean ADC and minimal ADC values. The maximal FA showed better sensitivity and specificity in these two groups. Therefore, mean and maximal FA may be adjuvant imaging parameters to differentiate between intracranial meningiomas and dural based metastases.