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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Correlation processing for correction of phase distortions insubaperture imaging
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Correlation processing for correction of phase distortions insubaperture imaging

机译：影射成像中相位失真校正的相关处理

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摘要

Ultrasonic subaperture imaging combines synthetic aperture andnphased array approaches and permits low-cost systems with improved imagenquality. In subaperture processing, a large array is synthesized usingnecho signals collected from a number of receive subapertures by multiplenfirings of a phased transmit subaperture. Tissue inhomogeneities andndisplacements in subaperture imaging may cause significant phasendistortions on received echo signals. Correlation processing onnreference echo signals can be used for correction of the phasendistortions, for which the accuracy and robustness are criticallynlimited by the signal correlation. In this study, we explore correlationnprocessing techniques for adaptive subaperture imaging with phasencorrection for motion and tissue inhomogeneities. The proposedntechniques use new subaperture data acquisition schemes to producenreference signal sets with improved signal correlation. The experimentalntest results were obtained using raw radio frequency (RF) data acquirednfrom two different phantoms with 3.5 MHz, 128-element transducer array.nThe results show that phase distortions can effectively be compensatednby the proposed techniques in real-time adaptive subaperture imaging
机译：超声波子孔径成像结合了合成孔径和相控阵方法，并允许低成本系统提高成像质量。在子孔径处理中，使用从多个接收子孔径收集的回波信号通过相控发射子孔径的多次发射来合成大型阵列。小孔成像中的组织不均匀性和位移可能会在接收到的回声信号上引起明显的相位扭曲。基准回波信号的相关处理可以用于相位失真的校正，其精度和鲁棒性受到信号相关性的严格限制。在这项研究中，我们探索用于运动和组织不均匀性的相位校正的自适应子孔径成像的相关处理技术。所提出的技术使用新的子孔径数据采集方案来产生具有改善的信号相关性的参考信号集。使用从两个不同的幻像中获得的原始射频（RF）数据（具有3.5 MHz，128元素换能器阵列）获得了实验结果.n结果表明，所提出的技术可以在实时自适应亚孔径成像中有效地补偿相位失真。

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