This work demonstrates an application of near field indirect microwave holography for the detection of malignant tissues in human breast in an effective way. The holograms are recorded by two directive antennas aligned along each other's boresight while performing a raster scan over a 2D plane utilizing XYlinear motorized translation stage and a uniform reference wave. The whole
In this work, a compact indirect microwave holographic setup is proposed and developed by utilizing the low cost, specifically designed directive antennae as transmitter and receiver. Microwave holograms are recorded while scanning the 2D plane using (x-y) motorized translation stage. The recorded holograms are then reconstructed numerically employing the angular spectrum diffraction phenomenon. The quality of the reconstructed amplitude image is further enhanced through the deep neural network, in order to combat with the low resolution of reconstructed images. The quantitative and qualitative results exploit the possibility of developing the miniaturized indirect microwave holographic system for near field applications.
K E Y W O R D Sangular spectrum, diffraction, holograms, holography, imaging, interference, ultra wide band antenna
Microwave holography utilizes antennae for the detection of cancerous tissues in the human breast. The safety assessment of an antenna is required prior to its radiation interaction with biological tissues. In this work, a specially designed and developed Vivaldi antenna with directivity at 45° for microwave holographic imaging has been presented. A detailed simulation of Specific Absorption Rate (SAR) and thermal analysis due to the radiation exposure of the designed antenna on self‐designed anatomically real breast phantoms is performed in CST environment. SAR values for 3D printed breast phantoms are also calculated experimentally. The quantitative results of SAR reveal the variation of ±10% in between the simulation and experimental results. It has been found that SAR due to the radiation of the designed antenna lies in the permissible limit. The thermal analysis in CST shows the rise of 0.096% in temperature after the exposure of 2 hours. Hence, the antenna can be used in microwave holography for breast cancer detection.
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