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Investigation of noise effect on image quality in microwave head imaging systems

机译：噪声对微波头成像系统图像质量的影响

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The effect of noise on the ability to detect strokes in the human head using microwave-based systems is investigated using both simulations and measurements. The simulations, which are implemented using the full-wave electromagnetic solver (CST), utilise a realistic numerical head model generated from magnetic resonance imaging slices. On the other hand, the experiments are performed using a wideband microwave system with a frequency range of 1-4 GHz. The experiments use a head phantom consisting of materials that accurately emulate (within 3% of reported properties of human brain tissues) the main tissues found in the human brain. It is shown, in both of the simulations and measurements, that a minimum signal-to-noise ratio of around 10 dB is required to accurately detect the presence of a stroke. Below this level, the microwave-based system either does not detect or falsely indicates the location of the stroke. Based on the presented results, the required microwave power to achieve acceptable detection is well within the recommended safe levels.
机译：使用仿真和测量方法，研究了噪声对使用基于微波的系统检测人的头部中风的能力的影响。使用全波电磁求解器（CST）进行的仿真利用了从磁共振成像切片生成的逼真的数值头部模型。另一方面，使用频率范围为1-4 GHz的宽带微波系统进行实验。实验使用的头部模型由能够准确模拟（在人类大脑组织的报告属性的3％之内）人类大脑中发现的主要组织的材料组成。在仿真和测量中均显示，需要约10 dB的最小信噪比才能准确检测笔画的存在。低于此水平，基于微波的系统不会检测到或错误地指示行程位置。根据给出的结果，实现可接受的检测所需的微波功率完全在建议的安全级别之内。

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