A wideband wearable electromagnetic (EM) head imaging system for brain stroke detection is presented. The proposed system aims at overcoming the challenges of size, rigidity, and complex structures of existing systems. The proposed system is built into a light-weight and compact imaging platform, which integrates a 16-element antenna array into a highly flexible custom-made wearable cap made of a cost-effective and robust room-temperature-vulcanizing (RTV) silicone. The system mitigates the mismatch between the skin and antenna array by introducing a flexible high-permittivity matching layer. The utilized compact antenna demonstrates wideband operational frequency over 0.6-2.5 GHz with a low signal distortion, safe values of SAR, and unidirectional radiations. The system is experimentally validated on realistic head phantoms. The polar sensitivity encoding (PSE) image processing algorithm is utilized to generate 2D images of different testing scenarios. The obtained images of a stroke-like target inside the head phantoms demonstrate the merits and feasibility of the system for preclinical trials.

中文翻译：

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用于头部成像的柔性电磁帽。

提出了一种用于脑中风检测的宽带可穿戴电磁 (EM) 头部成像系统。所提出的系统旨在克服现有系统的尺寸、刚性和复杂结构的挑战。所提议的系统内置于轻巧紧凑的成像平台中，该平台将 16 单元天线阵列集成到高度灵活的定制可穿戴帽中，该帽由经济高效且坚固的室温硫化 (RTV) 硅胶制成。该系统通过引入灵活的高介电常数匹配层来减轻皮肤和天线阵列之间的失配。使用的紧凑型天线展示了超过 0.6-2.5 GHz 的宽带工作频率，具有低信号失真、安全的 SAR 值和单向辐射。该系统在真实的头部幻影上进行了实验验证。利用极敏感编码（PSE）图像处理算法生成不同测试场景的二维图像。获得的头部幻影内中风样目标的图像证明了该系统在临床前试验中的优点和可行性。