摘要
目的 :探讨不同低剂量CT扫描对眼眶部外伤病变的诊断价值。方法 :对 14 8例眼眶部外伤患者分为 4组行不同低剂量 (10mA组 4 0例、2 0mA组 30例、30mA组 4 8例、5 0mA组 30例 )CT扫描 ,并对每例患者选取晶状体视神经层面常规剂量 (10 0mA)CT扫描 ,比较该层面二者的图像质量、眼眶部外伤病变的显示和患者辐射剂量。结果 :低剂量 (10mA、2 0mA)CT扫描图像质量以差的为主 ,不能显示球内小血肿。低剂量 (30mA、5 0mA)CT扫描图像质量以较好为主 ,对眼眶外伤病变的显示与常规剂量 (10 0mA)CT扫描相同。结论 :低剂量 (30mA)CT扫描可以用于诊断眼眶部外伤。
Objective:To investigate the diagnostic value of low-dose CT scanning in orbital trauma. Methods:148 cases of orbital trauma were divided into four groups:10 mA in group one(40 cases), 20 mA in group two(30 cases),30 mA in group three(48 cases) and 50 mA in group four (30 cases). The lens optic nerves slice were scanned by regular dose(100 mA) CT scanning in all cases as control. The image quality, the display of orbital trauma and radiation dose of patients were compared.Results: In the group one and two(10 mA、20 mA),the image quality was much poorer and the small hematoma could not be found. In the group three and four(30 mA,50 mA),the image quality was much better and the display of pathological changes was equal to that obtained by the regular dose(100 mA) CT scanning in orbital trauma. Conclusion:The low-dose (30 mA)CT scanning can be used to diagnose orbital trauma reliably.
出处
《中国中西医结合影像学杂志》
2004年第2期100-103,共4页
Chinese Imaging Journal of Integrated Traditional and Western Medicine
