外伤性白内障的CT诊断(附53例分析)

目的探讨外伤性白内障的ＣＴ表现和诊断价值。材料与方法７５例共７７只受伤眼，其中５３例共５５只晶体为外伤性白内障。将伤眼晶体与健侧非受伤眼的正常晶体进行ＣＴ表现对照分析。结果２２只外伤后无白内障的晶体密度与对侧正常晶体密度相似。８３．６％（４６／５５）的白内障晶体密度降低，其中１７例晶体密度近似于玻璃体密度。晶体密度减低程度与病程长短及损伤程度有关，与受伤机制无关。ＣＴ诊断与临床诊断的符合率为８３．６％，假阴性率为１６．４％。结论伤眼晶体密度降低提示有白内障的形成。

CT findings of traumatic cataract (analysis of 53 cases)

Purpose To study the findings and the diagnostic value of CT in traumatic cataract. Materials and methods Out of 75 patients with orbital trauma, 55 cataractous lens were confirmed by clinical observations and operations. The CT appearances of cataract lens were analyzed and compared with the contralateral normal lens. Results The lens density of the injured eye without traumatic cataract was similar to that of the contralateral normal lens. In 83.6%(46/55) of traumatic cataractous lens,the density was lower than that of the contralateral normal lens and the lens density of 17 was similar to that of the vitreous body. The decrease of lens density was related to the course of disease and the degree of damage, but not related to the cause of trauma, the coincidence rate of the CT and clinical diagnoses was 83.6%. The false negative rate was 16.4%. Conclusion Decreased density of the injured len is suggestive of formation of traumatic cataract.