【摘要】 目的　对照研究颅内常见MRI环形强化病变的MR影像表现 ,分析常见病变的影像学特点。方法　回顾性分析了 65例颅内常见MRI环形强化病变的临床及MR影像资料。其中胶质母细胞瘤 17例 ,转移瘤 17例 ,脑脓肿 12例 ,听神经鞘瘤 8例 ,颅咽管瘤 7例 ,脑囊虫 3例 ,原发性恶性淋巴瘤 1例。全部病例均经手术、病理证实。结果　肿瘤性病变的环形强化表现为厚壁 ,且壁厚薄不均、形态不规整 ,其中高度恶性肿瘤的强化环明显厚薄不均一 ,尤其是内壁凹凸不平、毛糙不光滑。非肿瘤性病变的强化环通常表现为形态规整 ,厚薄较为均匀一致 ,内壁光滑。结论　颅内常见MRI环形强化病变的不同表现形式可以为诊断提供重要信息 ,同时结合病人的病史、年龄、部位以及MR平扫的影像表现 ,在大多数情况下是可以做出正确诊断的更多还原

【Abstract】 Objective To study and compare the clinical and MR imaging characteristics of common intracranial ring enhanced lesions.Methods MR imaging studies of 65 intracranial ring enhanced lesions were reviewed retrospectively. The lesions included 17 glioblastomas, 17 metastasises, 12 brain abscesses, 8 acoustic neurinomas, 7 craniopharyngiomas, 3 neurocysticercosises, 1 malignant lymphoma. All cases were confirmed by surgery and pathology. Results The ring enhancement of tumors presented heterogenous thickness of thick walls and irregular forms. Among them, the highly malignant tumors appeared very obviously heterogeneous thickness of the walls, especially the inner walls were uneven and coarse. While the ring enhancement of the non-tumor lesions usually were of homogeneous thickness of the walls, regular shapes and smooth inner walls. Conclusion The different patterns of intracranial ring enhanced lesions on MR can supply important diagnostic information. Combining the patients’ history, age, location and the information of magnetic resonance imaging, we may make correct diagnosis.更多还原