The difference of Ala peak and the significant difference of mI/NmI can be helpful in the differential diagnosis between benign meningioma and haemangiopericytoma.

• Ala峰及mI峰的差异(尤其是mI/NmI)对良性脑膜瘤和血管外皮瘤的鉴别诊断有帮助。