低管电压CT联合迭代重建技术在眼眶CT检查中的应用

发布时间：2018-04-04 07:52

本文选题：眼眶　切入点：体层摄影术　出处：《中国临床医学影像杂志》2015年09期

【摘要】：目的:探讨低管电压联合迭代重建技术(IR)在眼眶CT检查中的应用价值。方法 :2014年6月—2015年1月于我院行眼眶CT平扫患者90例,随机分为120 k V组(A组)、100 k V组(B组)、80 k V组(C组),每组30例。A组行滤波反投影(FBP)重建,B组和C组行IR重建(idose3)。对各组进行图像质量主观及客观评价,记录各组辐射剂量。对图像质量及辐射剂量进行统计学分析。结果:A、B、C组各组的有效剂量分别为(7.3±0.7)m Sv、(4.5±0.3)m Sv、(2.2±0.2)m Sv,各组间差异有统计学意义。各组图像均满足诊断要求,图像质量评分均高于3分,且两观察者对图像质量评价的一致性好或非常好。低剂量组的图像背景噪声较常规剂量组高,且差异有统计学意义(P0.05)。结论:低管电压联合IR技术在眼眶CT检查中能明显降低CT辐射剂量同时图像满足诊断要求。
[Abstract]:Objective: to evaluate the value of low tube voltage combined with iterative reconstruction (IRI) in orbital CT examination.Methods: from June 2014 to January 2015, 90 cases of orbital CT plain scan were randomly divided into two groups: group A (120 kV) and group A (100 kV).The image quality of each group was evaluated subjectively and objectively, and the radiation dose of each group was recorded.The image quality and radiation dose were analyzed statistically.Results the effective dose of the group C was 7.3 卤0.7mSvln 4.5 卤0.3mSv.There was a significant difference among the three groups (2.2 卤0.2mSv). The results showed that the effective dose of the two groups was higher than that of the control group (P < 0.01).The image quality score of each group was higher than 3, and the consistency of image quality evaluation between the two observers was good or very good.The background noise of the low dose group was higher than that of the conventional dose group, and the difference was statistically significant (P 0.05).Conclusion: low tube voltage combined with IR technique can significantly reduce the dose of CT radiation and meet the diagnostic requirements.
【作者单位】：中国医科大学附属盛京医院放射科;
【分类号】：R777.5;R816.97

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