期刊文献+

弹性成像中不同频率子图像的相关性与频率复合 被引量:1

Correlation Analysis and Compounding of Frequency Sub-elastogram Pairs
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摘要 研究使用不同频率探头对同一个感兴趣区域(ROI)产生的弹性子图像之间是否具有解相关性,频率间隔大小对解相关性的影响以及不同频率子弹性图像进行复合后图像信噪比的变化。实验仿真整体应变为1%的40mm×40 mm均匀组织弹性模型,又仿真使用3、3.5、4、4.5、5、5.5、6、6.5、7、7.5 MHz频率探头分别对其弹性成像,对3和3.5 MHz、3和4 MHz、3和4.5 MHz、3和5 MHz、3和5.5 MHz、3和6 MHz、3和6.5 MHz、3和7 MHz、3和7.5 MHz产生的子弹性图像对的相关系数分别进行计算,然后对各子对图像对进行平均加权复合。仿真实验结果表明,不同频率的子弹性图像具有一定的解相关性,频率间隔越大,相关系数越低;不同频率的子弹性图像复合后,能提高弹性图像的信噪比,且频率间隔越大,信噪比提高越多。
出处 《中国生物医学工程学报》 CAS CSCD 北大核心 2010年第5期797-800,共4页 Chinese Journal of Biomedical Engineering
基金 郧阳医学院中青年基金(2009ZQN3)
关键词 超声 频率复合 弹性成像 相关系数 解相关 ultrasound frequency compounding elastography correlation coefficient decorrelation
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参考文献16

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