Rigamonti D, Drayer B P, Johnson P C, Hadley M N, Zabramski J, Spetzler R F
Division of Neurological Surgery, Barrow Neurological Institute, Phoenix, Arizona.
J Neurosurg. 1987 Oct;67(4):518-24. doi: 10.3171/jns.1987.67.4.0518.
The angiographic, computerized tomography (CT), and magnetic resonance imaging (MRI) findings were compared in 10 patients with a total of 16 pathologically verified cavernous angiomas. Only three lesions had abnormal vasculature in the form of venous pooling or a capillary blush. The CT scans were positive in seven patients and detected 14 lesions, while high-field strength (1.5 Tesla) MRI was positive in each case and demonstrated 27 distinct lesions. On T2-weighted MRI, the combination of a reticulated core of mixed signal intensity (SI) with a surrounding rim of decreased SI strongly suggests the diagnosis of a cavernous malformation. Smaller lesions appear as areas of decreased SI (black dots). The sensitivity of MRI is based on magnetic susceptibility and possibly diffusion effects related to field heterogeneity that is more conspicuous on high-field imaging and caused by the presence of excessive iron (hemosiderin).
对10例共16个经病理证实的海绵状血管瘤患者的血管造影、计算机断层扫描（CT）和磁共振成像（MRI）结果进行了比较。只有3个病灶有以静脉池或毛细血管造影剂外溢形式存在的异常血管。CT扫描在7例患者中呈阳性，检测到14个病灶，而高场强（1.5特斯拉）MRI在每种情况下均呈阳性，显示出27个不同的病灶。在T2加权MRI上，混合信号强度（SI）的网状核心与周围SI降低的边缘相结合强烈提示海绵状畸形的诊断。较小的病灶表现为SI降低的区域（黑点）。MRI的敏感性基于磁敏感性以及可能与场不均匀性相关的扩散效应，这种效应在高场成像上更为明显，是由过量铁（含铁血黄素）的存在引起的。
