能谱CT单能量技术优化髂静脉MSCTV血管成像质量的可行性研究

发布时间：2018-03-17 13:23

本文选题：髂静脉　切入点：体层摄影术　出处：《中国临床医学影像杂志》2015年12期 　论文类型：期刊论文

【摘要】：目的:探讨能谱CT单能量技术对提高间接法髂静脉MSCTV成像质量的应用价值。方法:44例患者行髂静脉能谱CT增强扫描,获得50 keV单能量、70 keV单能量和混合能量图像,并行髂静脉MPR、CPR和MIP重建。测量3组图像中髂静脉CT值、图像噪声及CNR,由2名高年资放射科医师采用双盲法对原始数据及图像质量进行独立主观评分。3组图像数据比较采用单因素方差分析,2名医师对图像质量主观评分一致性采用Kappa检验。结果:50 keV单能量图像的髂静脉CT值、图像噪声、CNR及主观评分均高于70 keV单能量和混合能量图像,3组图像的髂静脉CT值分别为(220.72±27.90)HU、(112.76±13.42)HU和(115.55±12.80)HU,图像噪声分别为29.83±5.15、15.25±2.73和18.46±3.05,CNR分别为4.55±1.74、3.63±1.60和2.68±1.22,差异均有统计学意义(F值分别为445.404、178.996和16.356,P值均0.01)。2名医师对3组图像的主观评价结果经检验差异有统计学意义(F值=63.825,P0.001:F值=64.938,P0.001)。2名医师对3组图像的主观评价结果一致性较好(Kappa=0.806,P0.001)。结论:能谱CT单能量技术能显著提高间接法髂静脉MSCTV成像质量。
[Abstract]:Objective: to evaluate the value of energy dispersive CT single energy technique in improving the quality of indirect iliac vein MSCTV imaging. Methods: forty four patients with iliac vein underwent enhanced scanning of energy spectrum of iliac vein, and 50 keV single energy and 70 keV single energy and mixed energy images were obtained. The CT value of iliac vein was measured in 3 groups. Image noise and CNR. Two senior radiologists used double blind method to evaluate the original data and image quality. 3 groups of image data were compared by single factor variance analysis of variance. 2 physicians scored image quality subjectively. The consistency was tested by Kappa. Results the CT value of iliac vein on single energy image of 50: 50 keV, The CT values of iliac veins in the three groups were higher than those in 70 keV single energy images and mixed energy images. The CT values of iliac veins were 112.76 卤13.42 Hu and 115.55 卤12.80 Hu, respectively, and the image noise were 29.83 卤5.1515, 15.25 卤2.73 and 18.46 卤3.05, respectively, which were 4.55 卤1.74 卤3.63 卤1.60 and 2.68 卤1.22, respectively. The results of subjective evaluation of the three groups of images were all 0.01n.2 for 445.404 / 178.996 and 16.356p respectively. There were significant differences in the results of subjective evaluation of the three groups of images. There was statistically significant difference in F value of 63.825p: 0.001F and 64.938g / P 0.001F respectively. The results of subjective evaluation of the three groups of images by physicians were in good agreement with those of the three groups. Conclusion: the energy spectrum of CT single energy technique is 0.806U / P 0.0010.Conclusion: Ct single energy technique has a good consistency in the results of subjective evaluation of the three groups of images. It can significantly improve the quality of indirect iliac vein MSCTV imaging.
【作者单位】：温州医科大学附属台州医院放射科;
【基金】：浙江省医药卫生科技计划A类项目(编号:2013KYA223)
【分类号】：R816.2

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