两种64排GE CT冠脉成像信噪比与剂量对比分析研究

Comparative analysis of signal to noise ratio and dose in two 64 row GE CT images

目的基于两种64排GE CT进行相关信噪比与剂量对比研究,分析冠心病有效的检查方式,提高早期诊断的正确率,以减少患者的发病率和死亡率.方法选取标准内人群为样本,提取并分析图像信息及参数,使用统计软件对数据进行分析得出规律,探讨两种CT在冠心病的早期筛查和诊断中成像信噪比和X线剂量之间的用量关系,从而分析两种设备在辐射剂量受控的前提下的图像质量.结果对照两组噪声平均值和信噪比平均值,得出GE宝石CT与Light Speed螺旋CT在同等情况下宝石CT噪声平均值较Light Speed螺旋CT明显减小,信噪比平均值明显较高.结论宝石CT冠脉成像更加清晰,且宝石CT在显示冠脉钙化斑块、混合性斑块、脂质斑块之间的界限区分及管腔狭窄程度的判断更加清晰易区分,推荐冠心病患者使用宝石CT做冠脉成像.

Objective To study the correlation signal-to-noise ratio(SNR)and dose comparison of two 64-slice GE CT in order to analyze the effective examination methods for coronary heart disease and improve the accuracy of early diagnosis,so as to reduce the morbidity and mortality of patients.Methods selection criteria in the crowd as sample,extraction and analysis of image information and parameters,the use of statistical software to analyze data obtained regularity,discusses two kinds of CT imaging in the early screening and diagnosis of coronary heart disease signal-to-noise ratio and the dosage of the relationship between X-ray dose,and analysis of two kinds of equipment on the premise of radiation dose control of image quality.Results Compared with Light Speed spiral CT(VCT),GE gemstone CT and Light Speed spiral CT showed that the average noise of GEM stone CT was significantly lower than that of Light Speed spiral CT(VCT),and the average SNR was significantly higher.Conclusion Gemstone CT coronary imaging is more clear,and gemstone CT can display the distinction between calcified plaque,mixed plaque and lipid plaque and distinguish the degree of lumen stenosis more clearly and easily.It is recommended to use gemstone CT for coronary artery imaging in patients with coronary heart disease.