Computational Validation of a 3-D Microwave Imaging System for Breast-Cancer Screening
Computational Validation of a 3-D Microwave Imaging System for Breast-Cancer Screening
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DOI：
10.1109/tap.2009.2021879
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发表时间：
2009-07-01
影响因子：
5.7
通讯作者：
Meincke, Peter
中科院分区：
文献类型：
--
作者：
Rubaek, Tonny;Kim, Oleksiy S.;Meincke, Peter
描述了丹麦技术大学目前正在开发的微波成像系统，并根据模拟数据测试了其性能。该系统使用基于迭代牛顿的成像算法来重建图像，并结合相关前向散射问题的有效矩量法解决方案。具有 32 个水平定向天线的圆柱形多基地天线装置用于收集数据。已经发现，与更常用的复杂相量公式相比，根据测量信号的幅度的对数和展开相位来公式化成像算法可以提高其性能。通过使用两种配方对模拟半球形乳房模型进行成像来说明这种改进。除此之外，通过使用天线垂直定向的测量设置对同一乳房模型进行成像，显示了在测量系统中使用天线的正确位置和方向的重要性。
The microwave imaging system currently being developed at the Technical University of Denmark is described and its performance tested on simulated data. The system uses an iterative Newton-based imaging algorithm for reconstructing the images in conjunction with an efficient method-of-moments solution of the associated forward scattering problem. A cylindrical multistatic antenna setup with 32 horizontally oriented antennas is used for collecting the data. It has been found that formulating the imaging algorithm in terms of the logarithm of the amplitude and the unwrapped phase of the measured signals improves its performance when compared to the more commonly used complex phasor formulation. This improvement is illustrated by imaging a simulated hemispherical breast model using both formulations. In addition to this, the importance of using the correct position and orientation of the antennas in the measurement system is shown by imaging the same breast model using a measurement setup in which the antennas are vertically oriented.