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作者回顾了病理证实的5例葡萄膜恶性黑色素瘤的MRI表现,并与US、CT及病理所见进行了对照分析。肿瘤基本征象为:①US检查肿瘤呈弥漫性强回声区,继发性视网膜剥离呈线状强回声改变,视网膜下积液呈无回声改变。②CT平扫肿瘤密度均匀,较玻璃体密度高,增强扫描呈轻至中度强化。③MRIT_1加权象(SE,500～700/30～40)显示肿瘤呈高于眼外肌信号的高信号,信号最低者与眼外肌相似,亦可呈混杂信号;继发性视网膜剥离及积液的信号强度较肿瘤更高。根据MRI及US测量,肿瘤大小与病理标本所见近似;该组
The authors reviewed MRI findings of 5 cases of pathologically confirmed uveal melanoma and compared them with those of US, CT and pathology. The basic signs of tumor: ①US examination of tumors was diffuse hyperechoic area, secondary retinal detachment was linear hyperechoic change, subretinal fluid showed no echo change. ② CT scan uniform tumor density, higher than the vitreous, enhanced scan was mild to moderate enhancement. (3) MRIT_1 weighted image (SE, 500 ~ 700/30 ~ 40) showed that the tumor was higher than the extraocular muscle signal high signal, the lowest signal similar to the extraocular muscle, also showed a mixed signal; secondary retinal detachment and effusion The signal intensity is higher than the tumor. According to MRI and US measurements, tumor size was similar to that seen with pathological specimens; the group