Warakaulle D R, Anslow P
Department of Radiology, Radcliffe Infirmary, Oxford, UK.
Clin Radiol. 2003 Dec;58(12):922-33. doi: 10.1016/s0009-9260(03)00268-x.
Magnetic resonance imaging (MRI) is the preferred technique for examining intracranial pathology in the non-acute setting in most cases. The aim of this review is to demonstrate the imaging appearances on unenhanced spin-echo MRI of lesions that show characteristic, unusual signal changes, which occur due to the presence of fat, cholesterol, paramagnetic substances, rapidly flowing fluids, air, cortical bone or calcification. The nature of the MRI signal, together with the anatomical location of the lesion should allow the provision of a narrow differential diagnosis, before the use of intravenous contrast medium or additional imaging sequences.
在大多数情况下，磁共振成像（MRI）是检查非急性颅内病变的首选技术。本综述的目的是展示在未增强自旋回波MRI上，因存在脂肪、胆固醇、顺磁性物质、快速流动的液体、空气、皮质骨或钙化而呈现特征性、异常信号变化的病变的影像表现。在使用静脉内造影剂或额外的成像序列之前，MRI信号的性质以及病变的解剖位置应有助于提供一个狭窄的鉴别诊断。
