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  

The feasibility study on optimization of image quality of iliac vein MSCTV by gemstone spectral CT imaging technique

作　　者：朱华勇[1] 潘璟琍[1] 朱卫萍[1] 丁建荣[1] 李杨飞[1] 季文斌[1] 樊树峰[1] 

机构地区：[1]温州医科大学附属台州医院放射科,浙江临海317000

出　　处：《中国临床医学影像杂志》2015年第12期886-889,共4页Journal of China Clinic Medical Imaging

基　　金：浙江省医药卫生科技计划A类项目(编号:2013KYA223)

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,P<0.001:F值=64.938,P<0.001)。2名医师对3组图像的主观评价结果一致性较好(Kappa=0.806,P<0.001)。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。Objective： To investigate the application value of gemstone spectral CT single energy imaging technique to im- prove the image quality of indirect iliac vein MSCTV. Methods： Forty-four patients underwent iliac vein CT enhanced scan- ning by the GSI technique. 50 keV, 70 keV monochromatic images and the mixed energy images, and reconstructed images of iliac vein MPR, CPR, MIP were obtained. CT value, image noise and CNR of iliae vein were measured, and subjective scores of the original data and the image quality were evaluated by two senior radiologists at double-blinded. One-way ANOVA was used for statistical analysis. Kappa test was used for the consistency of subjective scores. Results： The CT value, image noise, CNR and subjective score of iliac vein of 50 keV monochromatic images were statistically higher than those of 70 keV images and the mixed energy images. The CT values of iliac vein were （220.72±27.90）HU, （112.76±13.42） HU and （115.55±12.80） HU, respectively. The values of image noise were （29.83±5.15）, （15.25±2.73） and （18.46±3.05）, respectively. The values of CNR were （4.55±1.74）, （3.63±1.60） and （2.68±1.22）, respectively. The differences of CT value, image noise and CNR were statisti- cally significant among three groups （F=445.404, 178.996 and 16.356, P〈0.01）. The consistency of subjective scores for three groups among radiologists was good （Kappa=0.806, P〈0.001）. Conclusion： The gemstone spectral CT single energy imaging technique can significantly improve the image quality of indirect iliac vein MSCTV.

关 键 词：髂静脉 体层摄影术 螺旋计算机 血管造影术 

分 类 号：R322.123[医药卫生—人体解剖和组织胚胎学] R814.42[医药卫生—基础医学]