摘要
将39枚非磁性异物(金属异物11枚,非金属异物28枚,其大小介于1.5mm×1mm×0.5mm~9mm×4.2mm×4.2mm)置入22只兔眼球壁行CT和MRI检查,评价CT和MRI对眼球壁异物的诊断价值。结果:SE序列T1WI、PDWI、T2WI、Flash2d序列和CT对39枚眼球壁异物的检出阳性率分别为39%、77%、82%、97%和80%。CT漏检的8枚异物分别是2枚干木块、2枚青枝柳条和4枚塑料,MRI则全部显示;Flash2d漏检的1枚铅异物(2mm×1mm×1mm),经CT确定。结果提示:CT和MRI均能有效地检出眼球壁异物,二者联合应用将提高眼球壁异物的检出率;
お? To investigate the value of CT and MRI in detecting nonmagnetic foreign bodies in ocular ball wall,39 foreign bodies were inserted into ocular ball walls of 22 rabbits.Among them,11 were metallic and 28 were nonmetallic,with their dimensions ranging from 1.5 mm×1 mm×0.5 mm to 9 mm×4.2 mm×4.2 mm.The positive rates of T1WI,PDWI,T2WI,Flash2d sequence and CT in 39 foreign bodies of ocular wall were 39%,77%,82%,97% and 80% respectively.Eight foreign bodies of ocular ball wall undetected on CT were shown on MRI and they were 2 dry wooden pieces,2 fresh willow and 4 plastic pieces respectively,but were shown on MRI.One lead particle(2 mm×1 mm×1 mm)within the ocular ball wall undetected on MRI was shown on CT.The results demonstrated that CT or MRI was an effective method for detecting foreign bodies of ocular ball wall.The diagnostic positive rate of foreign bodies ocular ball wall would be improved,when CT and MRI were performed in the same case.Flash2d sequence was the best sequence of MRI in detecting foreign bodies of ocular ball wall.
出处
《河南医科大学学报》
1998年第2期10-12,共3页
Journal of Henan Medical University
基金
河南省科技攻关项目
关键词
眼异物
磁共振成像
CT
诊断
眼球壁异物
rabbit
eye foreign bodies
tomography,Xray computed
magnetic resonance imaging