双源CT冠状动脉造影:成像质量因素分析 |
|
|
作者:蒲锘 蒲红 蒋瑾 陶客言
【摘要】 目的 探讨影响双源CT冠状动脉造影成像质量的因素。方法 对我院双源CT冠状动脉造影病例210例的图像质量进行分级(1~4级)评估,并对造成冠脉成像质量下降的影响因素进行分析。结果 影响双源CT冠状动脉造影成像质量的因素有多种,对不同心率组冠脉成像清晰度分析,各组间无显著性差异,呼吸运动是冠脉成像质量下降的最主要的影响因素。结论 双源CT冠脉成像清晰度基本不受心率影响,扫描过程中正确屏气是获取最佳图像质量的关键。
【关键词】 双源CT; 冠状动脉; 体层摄影术; X线计算机; 血管造影; 成像质量
【Abstract】 Objective To investigate the influence factors of imaging quality of coronary artery imaging with dualsource CT.Methods Dualsource CT coronary artery angiography was performed in 210 cases.The imaging quality was classified and evaluated,then the influence factors of coronary artery angiography imaging were analyzed.Results There are several influence factors of coronary artery angiography imaging.No significant differences existed among different heart rate groups of imaging quality of coronary artery imaging.Breath movement was the main negative influence factor of imaging quality of coronary artery imaging.Conclusions Imaging quality of coronary artery imaging with dualsource CT was not influenced by heart rate.Right breath holding is the key for obtaining the best imaging quality.
【Key words】 dualsource; coronary artery; tomography; Xray computer; angiography; imaging quality
1 资料与方法
1.1 患者资料
搜集我院2007年5月20日~9月30日行双源CT冠状动脉成像病例共210例。其中,男116例,女94例,年龄36~79岁,平均64.5岁。所有患者扫描前未采取控制心率措施。心率54~134次/min,平均83.5次/min, 其中<75次/min 118人、76~95次/min 77人、>95次/min 15人,有心率不齐患者3例。
1.2 成像方法
扫描方法:采用西门子SOMATOM Definition 双源CT机,该仪器装备了两套 X线球管和相应的探测器,两套系统成 90°夹角安装在机架上。设置双源CT机采用心脏扫描模式:机架转速为0.33 s/转, 两组球管采用相同管电压120 [1] [2] [3] [4] 下一页 |
|
|
|
上一个论文: 一个植物乳杆菌隐蔽质粒的测序和注释 下一个论文: 我国旅游保险存在问题与对策分析 |
|