A COMPARATIVE-EVALUATION OF SEVERAL ALGORITHMS FOR PHASE ABERRATION CORRECTION
A COMPARATIVE-EVALUATION OF SEVERAL ALGORITHMS FOR PHASE ABERRATION CORRECTION
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DOI：
10.1109/58.308498
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发表时间：
1994-09-01
影响因子：
3.6
通讯作者：
TRAHEY, GE
中科院分区：
文献类型：
--
作者：
NG, GC;WORRELL, SS;TRAHEY, GE
给出了对几种相位校正技术进行分类的通用框架。这些技术的一个子集是通过利用在乳房中测量的2-D相位像差曲线的模拟来评估的。基于它们降低相位误差、稳定性以及对换能器阵列中的噪声和缺失元件的敏感性的能力，对这些技术进行了比较。当用于产生相位参考信号的孔径区域的大小和位置变化时，在这些性能测量中观察到显著的差异。与使用较大参考区域的技术相比，使用较小校正参考区域的技术更容易受到噪声和缺失元素的影响。在从一行过渡到下一行时，由于过渡点的元素间相关性较低，算法在二维相位校正中遇到了问题。结果表明，元素间关联的大小是决定相位校正性能的关键参数。
A common framework is presented to classify several phase correction techniques. A subset of these techniques are evaluated through simulations which utilize 2-D phase aberration profiles measured in the breast. The techniques are compared based on their ability to reduce phase errors, stability, and sensitivity to noise and missing elements in the transducer array. Significant differences are observed in these measures of performance when the size and location of the aperture area used to generate a phase reference signal are varied. Techniques that utilize a small correction reference region are more susceptible to noise and missing elements than techniques which use larger reference regions. The algorithms encounter problems in 2-D phase correction when making the transition from one row to the next, due to the low interelement correlation at the transition points. It is shown that the magnitude of the interelement correlation is the key parameter governing phase correction performance.