脉络膜血管瘤的MRI表现及动态增强研究  

MR imaging and dynamic contrast enhancement findings of choroidal hemangioma

作　　者：陈青华[1] 王振常[1] 鲜军舫[1] 田其昌[1] 燕飞[1] 杨本涛[1] 刘中林[1] 

机构地区：[1]首都医科大学附属北京同仁医院医学影像中心,100730

出　　处：《中华放射学杂志》2009年第7期735-738,共4页Chinese Journal of Radiology

基　　金：首都医学发展科研基金北京医学卫生科技重点支持项目（2005-2029）

摘　　要：目的探讨眼脉络膜血管瘤的常规及动态增强MRI表现。方法回顾性分析30例（31只眼共32个病灶）经临床、眼底相及荧光血管造影确诊的脉络膜血管瘤的MRI资料，其中行平扫和常规增强扫描30例，行动态增强扫描26例，观察各个序列MRI表现，计算动态增强曲线参数。结果32个脉络膜血管瘤病灶中，位于视乳头颞侧26个病灶，呈梭形28个病灶；与玻璃体信号相比，T1WI呈等信号23个病灶，T2WI呈等信号31个病灶；增强后明显强化32个病灶，强化均匀31个病灶，不均匀1个病灶，伴视网膜脱离18只眼；动态增强扫描出现填充征12个病灶，时间一信号曲线呈速升缓降型28个病灶，峰值时间为（91．00±25．27）S，上升斜率为3．03±1．13，流出率中位数为17．06％，强化率为2．87±0．79。结论脉络膜血管瘤MRI表现病灶形态、信号及动态增强具有一定特点，能为临床诊断和治疗方案制定提供重要信息。Objective To characterize the regular and the dynamic contrast enhancement MR imaging in choroidal hemangioma. Methods MR imaging findings of 30 cases （31 eyes, 32 lesions） with choroidal hemangioma confirmed by follow-up results were retrospectively analyzed. Among them, postcontrasted T1 -weighted imaging was performed in 30 patients and dynamic contrast enhancement scanning was performed in 26 cases. MRI findings and the time-intensity curve of dynamic contrast enhancement were analyzed. Results Among the 32 choroidal hemangiomas, 26 of them were at the temporal side of optic disc and 28 lesions were fusiform. Before enhancement, 23 lesions showed isointense T1 -weighted signal and 31 lesions were isointense on T2-weighted imaging. All the lesions showed strong enhancement on postcontrast T1-weighted imaging, including 31 homogenously enhanced lesions and one heterogeneously enhanced lesion. Retinal detachments were found in 18 eyes. Fill-in sign were observed in 12 lesions during dynamic contrast enhancement. The time-intensity curve of dynamic contrast enhancement in 28 lesions suggested a pattern with rapid enhancement and slow washout, time to peak （91.00 ±25.27） s, slope ratio 3.03 ± 1.13, the median of washout ratio 17.06%, enhancement ratio 2. 87 ± 0. 79. Conclusion MRI showed a few features of the location, shape, signal characteristics, and enhancement pattern in choroidal hemangioma, which may contribut to diagnosis and treatment plan of this disease.

关 键 词：脉络膜肿瘤 血管瘤 磁共振成像 

分 类 号：R686[医药卫生—骨科学]