滤波反投影与迭代算法的图像质量及左心室功能评价准确性的比较研究
发布时间：2018-07-29 14:19
【摘要】：目的:比较滤波反投影(Filtered back projection,FBP)与迭代算法(Sinogram-affirmed iterative reconstruction,SAFIRE)的图像质量及左心室功能评价的准确性。材料与方法:纳入我院先后3天内行冠状动脉CT检查和心脏MR检查者82例为研究对象,分别采用FBP和SAFIRE重建系列图像。将82例按照体质量指数(BMI)分成A组(BMI≤24 kg/m~2,共30例)和B组(BMI24 kg/m~2,共52例),测量主动脉根部及皮下脂肪组织CT值及标准差,计算图像信噪比(SNR)和对比噪声(CNR),分别比较两个BMI组不同重建方法的图像质量。利用心功能分析软件测量两种重建图像的左心室舒张末期容积(EDV)、收缩末期容积(ESV)、每搏输出量(SV)和射血分数(EF),并以MRI心功能测量结果作为金标准,对比分析两种重建方法评价左心室功能的准确性。统计分析采用配对t检验和Pearson相关分析。结果:A组和B组SAFIRE重建图像噪声分别下降18.98%和17.40%,SNR和CNR分别提高23.99%、32.54%和22.07%、31.73%,差异均有显著的统计学意义(P0.001)。与MRI相比较,两种重建算法测得的左心室EDV、ESV、SV和EF值均无统计学差异(P0.05),经Pearson相关分析,两种重建方法与MRI的结果均具有相关性。结论:SAFIRE重建较FBP重建可提高图像质量。两组重建方法测量左心室功能与MRI均具有相关性,SAFIRE重建图像测量结果更为准确。
[Abstract]:Aim: to compare the image quality and the accuracy of left ventricular function evaluation between filtered backprojection (Filtered back projection (FBP) and Sinogram-affirmed iterative construction algorithm (SAFIRE). Materials and methods: 82 patients who underwent coronary artery CT and cardiac Mr examination within 3 days were included in the study. FBP and SAFIRE were used to reconstruct serial images respectively. According to the body mass index (BMI), 82 cases were divided into two groups: group A (BMI 鈮，
本文编号：2152951
[Abstract]:Aim: to compare the image quality and the accuracy of left ventricular function evaluation between filtered backprojection (Filtered back projection (FBP) and Sinogram-affirmed iterative construction algorithm (SAFIRE). Materials and methods: 82 patients who underwent coronary artery CT and cardiac Mr examination within 3 days were included in the study. FBP and SAFIRE were used to reconstruct serial images respectively. According to the body mass index (BMI), 82 cases were divided into two groups: group A (BMI 鈮，
本文编号：2152951
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