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作者回顾性研究了29例病人31个颅内脑膜瘤的MRI 影象及其与手术标本病理检查结果的关系。MRI 作T_1加权、T_2加权及质子加权成像。所有病人均行头颅CT 扫描,23例还做了血管造影。瘤—脑间界面的MRI 信号强度分4型。Ⅰ型,肿瘤边缘在T_1、T_2像上均表现为环状低强度信号;Ⅱ型,T_1为低强度信号而T_2为高强度信号;Ⅲ型,肿瘤无明晰的边缘;Ⅳ型,混合型。从手术标本取材制片2～3张做光镜观察,25个肿瘤的切片中包括了瘤一脑交界区,主要检查肿瘤浸入脑的边界的结缔组织情况。围绕肿瘤边缘的结缔组织有以下几种:厚,肉眼可见;薄,镜下可见;无,未见明显的结缔组织。结果:Ⅰ型界面5个肿瘤,4个肿瘤病理检查见这种环状低强度信号边界是肉眼可见的结缔组织
The authors retrospectively studied the MRI images of 31 patients with intracranial meningioma in 29 patients and their relationship with the pathological findings of surgical specimens. MRI as T_1 weighted, T_2 weighted and proton weighted imaging. All patients underwent CT scans and 23 patients underwent angiography. MRI signal intensity of tumor-brain interface is divided into 4 types. Type I, the edge of the tumor showed ring-shaped low-intensity signals on T_1 and T_2 images; type Ⅱ, T_1 was low-intensity signal and T_2 was high-intensity signal; type Ⅲ, tumor had no clear edge; type Ⅳ, mixed type. Obtained from the surgical specimens 2 to 3 sheets of light microscopy observations, 25 tumor sections include the tumor-brain junction area, the main check tumor border immersion of connective tissue. Connective tissue around the edge of the tumor are the following: Thick, macroscopic; thin, microscopic; no, no obvious connective tissue. RESULTS: Five tumors of type I interface and four of the tumor histopathologic findings showed that this ring-shaped, low-intensity signal boundary was visible to the naked eye