双源CT上腹部低千伏扫描应用价值的研究  

Study on the application value of dual source computed tomography with low tube voltage in enhancement scanning in epigastric region

作　　者：杜煜[1] 时高峰[1] 王琦[1] 王亚宁[1] 李月考[1] 

机构地区：[1]河北医科大学第四医院,石家庄市050011

出　　处：《河北医药》2014年第3期339-341,共3页Hebei Medical Journal

摘　　要：目的利用双源CT(dual source computed tomography,DSCT)探讨低千伏在上腹部增强扫描中的应用价值。方法选择40例患者行DSCT上腹部强化扫描扫描,其中男22例,女18例。扫描完成后取得3组数据,A组融合图像(相当于120 kV)重建函数为D30(反投影滤过重建算法),B组和C组为80 kV数据,重建函数分别为D30和I30(迭代重建算法)。3组数据的动脉期及门静脉期图像分别测量腹主动脉、门静脉主干、肝脏、脾脏、胰腺、腹膜后脂肪及肌肉的平均CT值及噪声,并计算信噪比(SNR)。对3组影像质量评级评分。结果 A组和C组的噪声比较差异无统计学意义(P>0.05),且均高于B组(P<0.05);门静脉主干、主动脉、脾脏的平均CT值B组和C组差异无统计学意义(P>0.05),高于A组(P<0.05);门静脉主干、主动脉、脾脏的SNR A组和B组差异无统计学意义(P>0.05),均低于C组(P<0.05)。肝脏、胰腺的平均CT值3组差异无统计学意义(P>0.05),A、C组SNR差异无统计学意义(P>0.05),且均高于B组(P<0.05)。A组和C组图像满足诊断率均为100%,高于B组(P<0.05)。结论 80 kV管电压结合迭代重建算法可得到质量满意的上腹部强化扫描图像。Objective To investigate the application value of dual source computed tomography （DSCT） with low tube voltage in enhancement scanning in epigastric region .Methods Forty patients （22 males ＆amp; 18 females） underwent contrast-enhanced abdominal DSCT .The obtained data were reconstructed as three groups：group A,fused image reconstructed with D30 （ filter back projection FBP） ;group B,80kV image reconstructed with D30 and group C,80kV image reconstructed with I30 （iterative reconstruction IR）.The mean CT numbers,noise and SNR of abdominal organs were assessed quantitatively and qualitatively in each group .The image quality was scored in three groups .Results There was no significant difference in noise between group A and group C （ P ＆gt;0.05）,however,which in both groups was obviously higher than that in group B （P ＆lt;0.05）.There was no significant difference in CT average value in main portal vein ,aorta and spleen between group B and group C （ P ＆gt;0.05）,however,which in both groups was significantly higher than that in group A （ P ＆lt;0.05）.There was no significant difference in SNR in main portal vein ,aorta and spleen between group A and group B （ P ＆gt;0.05）,however, which in both groups was significantly lower than that in group C （ P ＆lt;0.05）.There was no significant difference in CT average value in liver and pancreas among three groups （ P ＆gt;0.05）.There was no significant difference in SNR between group A and group C （ P ＆gt;0.05）,however,which in both groups was significantly higher than that in group B （ P ＆lt;0.05）. The image satiation diagnostic rate in group A and group C was 100%,which was significantly higher than that in group B （P ＆lt;0.05）.Conclusion The iterative reconstruction method with 80kV tube voltage can obtain satisfactory enhancement scanning image in epigastric region.

关 键 词：体层摄影术 X线计算机 管电压 增强扫描 

分 类 号：R814.42[医药卫生—影像医学与核医学]