Shi G, Zhang X, Li Q
Department of Ophthalmology, First Teaching Hospital of Henan Medical University, Zhengzhou.
Zhonghua Yan Ke Za Zhi. 1997 Mar;33(2):100-2.
To approach the characteristics of magnetic resonance imaging (MRI) and CT in detection and localization of intraocular foreign bodies.
Detection and localization of 28 cases (42 foreign bodies) of non-magnetic intraocular foreign body were compared in MRI and CT with criteria of operative results.
The positive rates of MRI and CT in detection of 42 non-magnetic intraocular foreign bodies were respectively 90.5% and 95.2% (chi 2 test: P > 0.5). The positive rates of MRI and CT in localization were respectively 89.5% and 60.0% (chi 2 test: P < 0.05).
MRI could be used in detection and localization of non-magnetic intraocular foreign bodies with high positive rates in detection and superior to CT in demonstrating non-magnetic intraocular foreign bodies with low density and the relationship between foreign bodies and intraocular tissues. MRI was not as believable as CT in detection of foreign bodies in eye wall and not an appropriate modality in examinations of magnetic intraocular foreign body.
探讨磁共振成像（MRI）与CT在眼内异物检测及定位中的特点。
对28例（42个异物）非磁性眼内异物进行MRI和CT检查，并与手术结果标准进行比较，以检测和定位异物。
42个非磁性眼内异物的MRI和CT检测阳性率分别为90.5%和95.2%（卡方检验：P>0.5）。MRI和CT定位阳性率分别为89.5%和60.0%（卡方检验：P<0.05）。
MRI可用于非磁性眼内异物的检测和定位，检测阳性率高，在显示低密度非磁性眼内异物及异物与眼内组织的关系方面优于CT。在检测眼球壁异物方面，MRI不如CT可靠，不适用于磁性眼内异物检查。
