CT和MRI诊断眼部非金属异物的实验研究  

Experimental Study of CT and MRI Detection of Intraocular Non-Metallic Foreign Bodies

作　　者：刁金中[1] 黄志兰[2] 张迎光[3] 施丁一[1] 杨宏美[1] 

机构地区：[1]武警江苏总队医院影像科,江苏扬州225003 [2]第四军医大学西京医院放射科 [3]第一军医大学珠江医院放射科

出　　处：《中国医学影像技术》2002年第5期403-405,共3页Chinese Journal of Medical Imaging Technology

摘　　要：目的　探讨CT和MRI诊断眼部非金属异物的价值和限度。方法　对 8种大小约 3～ 5mm的非金属异物包括干木屑、湿木屑、干竹签、湿竹签、棉线、塑料、玻璃、石块 ,随机植入 10只犬 2 0个眼球内或球后 ,做CT平扫 ,并对其中 2只犬做了MRI平扫。结果　共植入 3 2枚异物 ,CT检出 3 0枚 ,2枚未检出 ,其中一枚为湿木屑、另一枚为棉线 ,此 2只犬做了MRI平扫 ,异物全部检出。结论　CT能检出大部分眼部非金属异物 ,但对等密度异物检出有一定的困难。MRI对非金属异物的检出较CT更具有优势 ,MRI是CT的必要补充。Objective To discuss the value and limitation of CT and MRI in the detection of intraocular non metallic foreign bodies. Methods Eight kinds of non metallic foreign bodies (3-5mm) including wood (dry and wet),bamboo (dry and wet),cotton thread,plastic,glass and stone, were randomly lodged into 20 orbital regions of 10 dogs (intraocularly and extraocularly). CT and MRI scan were performed. Results Thirty of the 32 foreign bodies could be detected by computed tomography, the other two foreign bodies which could not be seen on CT films were wet wood and cotton thead. MRI was performed to the two dogs with the two foreign bodies and could detect them. Conclusion CT can detect most of the non metallic foreign bodies,but has some difficulties with medium density foreign bodies. MRI has a lot of advantages in dealing with these foreign bodies, which is a necessary complement to computed tomography.

关 键 词：实验研究 眼异物 磁共振成像 CT MRI 诊断 

分 类 号：R779.14[医药卫生—眼科]