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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >2-D Ultrasound Sparse Arrays Multidepth Radiation Optimization Using Simulated Annealing and Spiral-Array Inspired Energy Functions
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2-D Ultrasound Sparse Arrays Multidepth Radiation Optimization Using Simulated Annealing and Spiral-Array Inspired Energy Functions

机译：使用模拟退火和螺旋阵列启发的能量函数的二维超声稀疏阵列多深度辐射优化

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摘要

Full matrix arrays are excellent tools for 3-D ultrasound imaging, but the required number of active elements is too high to be individually controlled by an equal number of scanner channels. The number of active elements is significantly reduced by the sparse array techniques, but the position of the remaining elements must be carefully optimized. This issue is faced here by introducing novel energy functions in the simulated annealing (SA) algorithm. At each iteration step of the optimization process, one element is freely translated and the associated radiated pattern is simulated. To control the pressure field behavior at multiple depths, three energy functions inspired by the pressure field radiated by a Blackman-tapered spiral array are introduced. Such energy functions aim at limiting the main lobe width while lowering the side lobe and grating lobe levels at multiple depths. Numerical optimization results illustrate the influence of the number of iterations, pressure measurement points, and depths, as well as the influence of the energy function definition on the optimized layout. It is also shown that performance close to or even better than the one provided by a spiral array, here assumed as reference, may be obtained. The finite-time convergence properties of SA allow the duration of the optimization process to be set in advance.
机译：全矩阵阵列是进行3D超声成像的出色工具，但是所需的有源元件数量过多，无法由相同数量的扫描仪通道单独控制。稀疏阵列技术可显着减少有源元件的数量，但必须仔细优化其余元件的位置。通过在模拟退火（SA）算法中引入新颖的能量函数，在此面临此问题。在优化过程的每个迭代步骤中，一个元素可以自由转换，并模拟关联的辐射图。为了控制多个深度处的压力场行为，引入了三个能量函数，这些函数受Blackman锥形螺旋阵列辐射的压力场的启发。这种能量功能旨在限制主瓣宽度，同时在多个深度降低旁瓣和光栅瓣水平。数值优化结果说明了迭代次数，压力测量点和深度的影响，以及能量函数定义对优化布局的影响。还显示出可以获得接近于甚至什至优于由螺旋阵列提供的性能，在此假设为参考。 SA的有限时间收敛特性允许提前设置优化过程的持续时间。

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  • 作者

    Emmanuel Roux; Alessandro Ramalli; Piero Tortoli; Christian Cachard; Marc C. Robini; Hervé Liebgott;

  • 作者单位

    Department of Information Engineering, Università degli Studi di Firenze, Florence, Italy;

    Department of Information Engineering, Università degli Studi di Firenze, Firenze, Italy;

    Department of Information Engineering, Università degli Studi di Firenze, Firenze, Italy;

    Centre de Recherche en Applications et Traitement de l’image pour la Santé, Institut national de la santé et de la recherche médicale and the Institut national des sciences appliquées de Lyon, Université de Lyon, Lyon, France;

    Centre de Recherche en Applications et Traitement de l’image pour la Santé, Institut national de la santé et de la recherche médicale and the Institut national des sciences appliquées de Lyon, Université de Lyon, Lyon, France;

    Centre de Recherche en Applications et Traitement de l’image pour la Santé, Institut national de la santé et de la recherche médicale and the Institut national des sciences appliquées de Lyon, Université de Lyon, Lyon, France;

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  • 正文语种 eng
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  • 关键词

    Simulated annealing; Spirals; Finite element analysis; Probes; Two dimensional displays; Acoustics;

    机译：模拟退火;螺旋;有限元分析;探针;二维显示;声学;

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