双源CT肺动脉成像的低对比剂量优化研究
李莉明;高剑波;刘杰;侯平;刘颖;王素雅;刘彦立
【期刊名称】《实用放射学杂志》 【年(卷),期】2016(032)007
【摘要】目的：探讨双源 CT 大螺距肺动脉成像在低对比剂量优化时的可行性。方法对80例疑似肺栓塞的患者行 CT 肺动脉造影(CTPA)检查。按照随机数表法分为 A、B 2组：A 组,常规组40例,对比剂50 mL,自动跟踪触发扫描；B 组,小剂量测试组40例,对比剂量=体质量×0.3 mL/kg。测量2组肺动脉 CT 值、动静脉 CT 差值、对比噪声比(CNR)、信噪比(SNR)、辐射剂量,进行两独立样本 t 检验。评价图像质量、肺栓塞诊断阳性率,进行卡方检验。结果2组肺栓塞诊断阳性率差异无统计学意义(P =0.655)。主观质量评分差异无统计学意义(P =0.174)。B 组与 A 组的肺动脉干 CT 值与左肺 SⅢ动静脉差值差异有统计学意义(P =0.001)。B 组与 A 组的肺动脉干 SNR、CNR 差异无统计学意义(P =0.250、0.203)。B 组有效辐射剂量明显低于 A 组,差异有统计学意义(P =0.001)。结论双源 CT 大螺距肺动脉成像低对比剂量优化时,在满足临床诊断肺栓塞的需要下,较大程度地减少了对比剂的用量。%Objective To explore the feasibility of high-pitch CT pulmonary angiography (CTPA)with low dose contrast medium optimization in dual-source CT.Methods Eighty patients with high risk of pulmonary embolism who underwent CTPA on a dual-source CT were divided into two groups randomly:Group A,40 patients,50 mL contrast medium per patient,with conventional bolus tracing
scanning;Group
B,40
patients,contrast
medium=body
weight×0.3 mL/kg,with test bolus of small dose contrast agent. Pulmonary artery CT value,the differences of CT values in the paired PA and PV,SNR,CNR,radiation dose of two Groups were compared by two sample t-test.The positive rate of pulmonary embolism and the subjective indexes for assessing CT image quality were compared byχ2 test.Results There were no difference of the positive rate of PE between two Groups (P =0.655),and no sta-tistical difference for image quality scores between two Groups(P =0.1 74).The MPA CT value and the differences of CT values in the paired PA and PV in L-SⅢ of Group B were higher than those in Group A (P =0.001).However,no significant differences in CNR and SNR in MPA were observed between the two Groups(P =0.250,0.203,respectively).The ED of Group B was lower than that of Group A (P =0.001).Conclusion High-pitch CTPA in dual-source CT with lower dose contrast medium optimization can minimize the amount of contrast agent while meeting the clinical requirements. 【总页数】4页(1112-1115)
【关键词】计算机体层成像;血管造影术;肺栓塞 【作者】李莉明;高剑波;刘杰;侯平;刘颖;王素雅;刘彦立
【作者单位】郑州大学第一附属医院放射科，河南 郑州 450052;郑州大学第一附属医院放射科，河南 郑州 450052;郑州大学第一附属医院放射科，河南 郑州 450052;郑州大学第一附属医院放射科，河南 郑州 450052;郑州大学第一附属医院放射科，河南 郑州 450052;郑州大学第一附属医院放射科，河南 郑州
450052;郑州大学第一附属医院放射科，河南 郑州 450052 【正文语种】中文
【中图分类】R814.42;R814.43;R563.5 【文献来源】
https://www.zhangqiaokeyan.com/academic-journal-cn_journal-practical-radiology_thesis/0201239600323.html 【相关文献】
1.双源CT肺动脉成像不同扫描模式图像质量及辐射剂量的对比研究 [J], 罗显丽; 黄婷婷; 刘盼; 孙辉; 王梦; 李邦国
2.双源CT低剂量对比剂肺灌注成像评估肺动脉内血栓与灌注缺损间的关系 [J], 谭四平; 沈比先; 陈丽兴; 薛水培; 楚二伟; 刘康; 汪春荣; 贾飞鸽
3.Mono-plus在肺动脉低对比剂量成像中的应用价值 [J], 杨玉姣; 刘杰; 李莉明; 王素雅; 王攀鸽; 高剑波
4.双源CT肺动脉造影与双能量肺灌注成像诊断急性肺栓塞的对比研究 [J], 吴京兰; 庄瑞强; 谭四平; 高德宏; 刘岩松; 杨新明; 张海钢; 周俊领; 肖水明; 洪全球
5.双源双能量不同管电压CT肺动脉成像质量的对比研究 [J], 路莉; 张龙江; 周长圣; 赵艳娥; 罗松; 梁泉; 卢光明
以上内容为文献基本信息，获取文献全文请下载
双源CT肺动脉成像的低对比剂量优化研究
