摘要
目的:探讨基于高级模型迭代重建算法(ADMIRE)的低管电压CT扫描对上腹部图像质量和辐射剂量的影响。方法:收集2016年11月至2017年9月丽水市中心医院上腹部平扫患者200例,随机分对照组50例和实验组150例,均采用ADMIRE,对照组管电压为120 k V。实验组根据体质量指数(BMI)分为低管电压A、B、C组,管电压分别为80、90、100 k V。比较各组图像的主观评分、背景噪声标准差(SD)、肝脏信噪比(SNR)、肝脏对比噪声比(CNR)以及有效辐射剂量(ED)。结果:对照组和低管电压A、B、C组患者间的年龄、性别构成、竖脊肌CT值及图像质量评分差异无统计学意义,且均满足临床诊断要求;低管电压组与对照组之间的BMI和肝脏CT值差异均有统计学意义(P<0.05),其中低管电压A、B组的BMI均显著小于对照组,而低管电压C组明显高于对照组;低管电压A组的肝脏CT值显著高于对照组。低管电压A、B、C组的图像的背景噪声SD值均显著低于对照组,而肝脏SNR及肝脏CNR明显高于对照组;同时,低管电压A、B、C组的ED显著低于对照组(P<0.05)。结论:应用第三代双源CT行上腹部平扫检查时,结合患者BMI的差异,利用基于ADMIRE的低管电压扫描模式能够在保证图像质量的同时,显著降低辐射剂量。
Objective:To explore the effect of low-tube voltage CT scanning on radiation dose and image quality of the upper abdomen based on advanced model iterative reconstruction algorithm(ADMIRE).Methods:Totally 200 patients who had undergone upper abdomen scanning in Lishui Central Hospital from November 2016 to September 2017 were enrolled and randomly assigned to the control group(n=50)and the experimental group(n=150),who were all treated with ADMIRE with the tube voltage of 120 kV in the control group.Meanwhile,the experimental group was divided as low-tube voltage A,B,and C according to the body mass index(BMI)with the tube voltage of 80 kV,90 kV and 100 kV respectively.Subjective scores of images,background noise standard deviation(SD),liver signal-to-noise ratio(SNR),liver contrast-to-noise ratio(CNR)and effective radiation dose(ED)were compared between each group.Results:There were no significant differences between the control group and all the low-tube voltage groups(P>0.05)in age,gender or CT values of erector spinal and the image quality scores,with all images meeting the clinical diagnostic requirements,but there were significant differences(P<0.05)in BMI and liver CT.The BMI of the low-tube voltage groups A and B was significantly lower than that of the control group,while that of the low-tube voltage group C was significantly higher than the control group.Liver CT value of the low-tube voltage group A was significantly higher than the control group.The background noise SD of the images of the low-tube voltage groups A,B,and C were significantly lower than those of the control group,while the liver SNR and liver CNR were significantly higher than those of the control group.Meanwhile,the ED of the low tube voltages A,B and C was significantly lower than that of the control group(P<0.05).Conclusion:When applying the third-generation dual-source CT to the upper abdominal scanning,ADMIRE-based low-tube voltage scanning mode can significantly reduce the radiation dose and ensure the image quality.
作者
陈春妙
林桂涵
吴徐璐
卢陈英
杨宏远
陈潇
纪建松
胡祥华
CHEN Chunmiao;LIN Guihan;WU Xulu;LU Chenying;YANG Hongyuan;CHEN Xiao;JI Jiansong;HU Xianghua(Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research,Department of Radiology,Lishui Central Hospital,Lishui 323000,China)
出处
《温州医科大学学报》
CAS
2020年第1期56-59,64,共5页
Journal of Wenzhou Medical University
基金
丽水市高层次人才培养项目（2016RC22）
浙江省医药卫生科技计划项目（2016KYB335）
关键词
高级模型迭代重建算法
辐射剂量
体层摄影术
X线计算机
advanced model iterative reconstruction algorithm
radiation dosage
tomography,X-Ray computed
