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 kV组（A组）、100 kV组（B组）、80 kV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） mSv、（4.5±0.3） mSv、（2.2±0.2） mSv，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（P＜0.05）。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 investigate the combined application value of low tube voltage and iterative reconstruction(IR) for CT imaging of the orbit. Methods: From June 2014 to January 2015 in our hospital, 90 patients were referred for orbit CT. Patients were randomly assigned into three groups: 120 kV group(group A), 100 kV group(group B) and 80 kV group(group C), with 30 cases in each group. Group A underwent filtered back projection(FBP) reconstruction while group B and C underwent IR reconstruction. Subjective and objective evaluations were performed on image quality and radiation dose was recorded for each group, which were statistically analyzed. Results: The average effective dose of group A, B and C were (7.3±0.7) mSv, (4.5±0.3) mSv and (2.2±0.2) mSv respectively. There were significant difference among groups. The images of the three groups all met the diagnostic requirement. All image quality scores were higher than 3 points. The consistency of the two observers in evaluating image quality was either good or very good. The image background noise of low-dose group was higher than that of standard dose group, and the difference was statistically significant(P<0.05). Conclusion: Low tube voltage combined with IR algorithm in orbit CT examination can significantly reduce radiation dose, and the image quality can meet the diagnostic requirement.
关键词
眼眶 /
体层摄影术 /
螺旋计算机
Key words
Orbit /
Tomography /
spiral computed
吴 迪;郭文力;赵 珑;陈志安.
低管电压CT联合迭代重建技术在眼眶CT检查中的应用[J]. 中国临床医学影像杂志. 2015, 26(9): 623-626
WU Di;GUO Wen-li;ZHAO Long;CHEN Zhi-an.
Combined application of low tube voltage and iterative reconstruction for CT imaging of the orbit[J]. Journal of China Clinic Medical Imaging. 2015, 26(9): 623-626
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