摘要
目的本研究旨在探讨低管电压扫描在冠脉CTA成像技术中KV值与体质量的关系。方法选取疑似为冠状动脉疾病患者120例为研究对象,所有患者均行冠状动脉CTA检查。根据KV值不同分为三组:A组120 KV(45例);B组100 KV(45例);C组80 KV(30例)。并将各组患者按体质量不同分为分为<70 kg、70~85kg、>85kg三个级别,C组不设>85kg级别。所有患者使用的对比剂为碘普罗胺(370 mgI/m1)。比较各组各个体质量级别的图像质量和有效辐射剂量。结果除80KV组70~85kg级别出现2分外,其余各组各级别患者图像质量主观评分均≥3分,A、B组中>85kg级别和C组70~85kg级别评分较低,与其他组评分差别明显。同样是≤70 kg体质量患者在不同KV组其血管CT值差异明显,均有统计学意义(均P<0.001)。同样是70~85kg体质量级别患者在不同KV组其血管CT值差异明显,差异均有统计学意义(均P<0.001)。同样是>85kg体质量级别患者在不同KV组其血管CT值差异明显,差异均有统计学意义(均P<0.001)。B组>85kg级别和C组70~85kg级别的SNR和CNR均较其他组降低,图像质量较差。同样<70 kg级别在100KV组比120KV组ED减少42.4%,80KV组比120KV组减少68.3%(P<0.001);同样是70~85kg级别在100KV组比在120KV组的ED减少40.4%,在80KV组比在120组ED减少68.3%(P<0.001);同样是>85kg级别在100KV组的ED比在120KV组减少40.8%(P<0.001)。结论在冠状动脉CTA成像,体质量≤70 kg的患者应用80 KV剂量、体质量70~85kg的患者应用100 KV剂量可获得与120 KV剂量相当的图像质量,而且可有效减少辐射剂量。
Objective This study aims to explore the relationship between KV value and body mass in coronary CTA imaging technology using low tube voltage scanning.Methods 120 patients with suspected coronary artery disease were selected as the research object,and all patients underwent coronary CTA.According to different kV values,they were divided into three groups:group A,120 kV(45 cases);Group B,100 kV(45 cases);80 kV in group C(30 cases).The patients in each group were divided into three levels according to their body weight:less than 70 kg,70-85kg,and>85kg.Group C did not have>85kg.The contrast agent used in all patients was iopromide(370 MGI/M1).The image quality and effective radiation dose of each individual quality level in each group were compared.Results Except for the 80kV group with a score of 2 at the level of 71-85kg,the subjective score of image quality of patients at all levels in other groups was≥3.The score of>85kg in groups A and B and 70-85kg in group C was lower,which was significantly different from other groups.Similarly,patients with body weight≤70 kg had significantly different vascular CT values in different kV groups(all P<0.001).The CT value of blood vessels of patients with 70-85kg body mass level in different kV groups was significantly different,and the differences were statistically significant(all P<0.001).Similarly,patients with body mass>85kg had significant differences in vascular CT values in different kV groups(all P<0.001).The SNR and CNR of group B>85kg and group C 70~85kg were lower than those of other groups,and the image quality was poor.Similarly,at the level of<70 kg,the ED of 100kV group was 42.4%less than that of 120kv group,and that of 80kV group was 68.3%less than that of 120kv group(P<0.001);Similarly,at the level of 70-85kg,the ED of 100kV group was reduced by 40.4%compared with that of 120kv group,and that of 80kV group was reduced by 68.3%compared with that of 120 group(P<0.001);Similarly,the ED of>85kg level in 100kV group was 40.8%lower than that in 120kv group(P<0
作者
邹才盛
梁萍
陈更瑞
叶佳国
王贤坤
夏世豪
高官华
胡宗宇
陈小妹
ZOU Cai-sheng;LIANG Ping;CHEN Geng-rui;YE Jia-guo;WANG Xian-kun;XIA Shi-hao;GAO Guan-hua;HU Zong-yu;CHEN Xiao-mei(The People's Hospittal of Beihai,Beihai 536000,Guangxi Zhuang Autonomous Region,China)
出处
《中国CT和MRI杂志》
2024年第7期93-95,共3页
Chinese Journal of CT and MRI
基金
北海市科技计划项目(北科合202082049)。